Back to GetFilings.com








FORM 10-K
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
(Mark One)

[x] Annual report pursuant to Section 13 or 15(d) of the Securities
Exchange Act of 1934 [Fee Required]

For the fiscal year ended December 31, 1997

OR

[ ] Transition report pursuant to Section 13 or 15(d) of the Securities
Exchange Act of 1934 [No Fee Required]

For the transition period from to

Commission File Number 33-38511

Southwest Developmental Drilling Fund 91-A, L.P.
Exact name of registrant as specified in
its limited partnership agreement

Delaware 75-2387814
(State or other jurisdiction (I.R.S. Employer
of incorporation or organization) Identification No.)

407 N. Big Spring, Suite 300, Midland, Texas 79701
(Address of principal executive office) (Zip Code)

Registrant's telephone number, including area code (915) 686-9927

Securities registered pursuant to Section 12(b) of the Act:

None

Securities registered pursuant to Section 12(g) of the Act:

limited and general partner interests

Indicate by check mark whether registrant (1) has filed reports required to
be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934
during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days: Yes x No

Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K (229.405 of this chapter) is not contained herein,
and will not be contained, to the best of registrant's knowledge, in
definitive proxy or information statements incorporated by reference in
Part III of this Form 10-K or any amendment to this Form 10-K. [x]

The registrant's outstanding securities consist of Units of limited
partnership interests for which there exists no established public market
from which to base a calculation of aggregate market value.

The total number of pages contained in this report is 43. There is no
exhibit index.


Table of Contents

Item Page

Part I

1. Business 3

2. Properties 6

3. Legal Proceedings 8

4. Submission of Matters to a Vote of Security Holders 8

Part II

5. Market for Registrant's Common Equity and Related
Stockholder Matters 9

6. Selected Financial Data 10

7. Management's Discussion and Analysis of
Financial Condition and Results of Operations 11

8. Financial Statements and Supplementary Data 18

9. Changes in and Disagreements with Accountants
on Accounting and Financial Disclosure 36

Part III

10. Directors and Executive Officers of the Registrant 37

11. Executive Compensation 40

12. Security Ownership of Certain Beneficial Owners and
Management 40

13. Certain Relationships and Related Transactions 41

Part IV

14. Exhibits, Financial Statement Schedules, and Reports
on Form 8-K 42

Signatures 43


Part I

Item 1. Business

General
Southwest Developmental Drilling Fund 91-A, L.P. (the "Partnership" or
"Registrant") was organized as a Delaware limited partnership on January 7,
1991. The offering of limited and general partner interests began
September 17, 1991 as part of a shelf offering registered under the name
Southwest Developmental Drilling Program 1991-92, reached minimum capital
requirements on April 22, 1992 and concluded April 30, 1992. The
Partnership has no subsidiaries.

The Partnership has expended its capital and acquired leasehold interests
and completed drilling operations. The Partnership has produced and
marketed the crude oil and natural gas produced from such properties.

The principal executive offices of the Partnership are located at 407 N.
Big Spring, Suite 300, Midland, Texas, 79701. The Managing General Partner
of the Partnership, Southwest Royalties, Inc. (the "Managing General
Partner") and its staff of 130 individuals, together with certain
independent consultants used on an "as needed" basis, perform various
services on behalf of the Partnership, including the selection of oil and
gas properties and the marketing of production from such properties. The
Partnership has no employees.

Principal Products, Marketing and Distribution
The Partnership has acquired leasehold interests and drilled oil and gas
properties located in Texas and New Mexico. All activities of the
Partnership are confined to the continental United States. All oil and gas
produced from these properties is sold to unrelated third parties in the
oil and gas business.

The revenues generated from the Partnership's oil and gas activities are
dependent upon the current market for oil and gas. The prices received by
the Partnership for its oil and gas production depend upon numerous factors
beyond the Partnership's control, including competition, economic,
political and regulatory developments and competitive energy sources, and
make it particularly difficult to estimate future prices of oil and natural
gas.


1997 was another volatile year in the oil market. Prices ranged from a
high of approximately $26 in the first quarter to a low near $18 per
barrel. Two contributing factors that influence the oil industry are the
strength of the economy and activity in the Middle East. Both influenced
the supply and demand of oil, and both played roles in price swings this
year. Economic expansion throughout the world enabled consumption to
surpass 70 million barrels of oil per day. However, early in the year,
producing countries failed to make up the difference in supply, placing
upward pressure on prices. U.S. production fell slightly in 1997 to
average roughly 6.4 million barrels of oil per day. Over the Thanksgiving
weekend, OPEC agreed to increase their crude oil production ceiling by
approximately 10%, but experts have said that many OPEC countries were
already producing beyond their quotas, therefore, capacity is not expected
to expand severely. Then on December 4th, the UN Security Council approved
a renewal of the Iraqi oil-for-food program. The OPEC agreement and the
UN's decision on the oil-for-food program will certainly increase the world
supply of oil and most likely depress prices in the near term. However,
world demand is expected to continue with strong growth in 1998.

The December 31, 1997 NYMEX oil price of $17.64 dropped to $14.32 as of
March 18, 1998. The price decline in the first quarter of 1998 could cause
a material write down in oil and gas properties and a possible reduction in
future distributions to investors.

Overall the 1997 average price of natural gas increased nationwide from the
1996 rates. In some areas the increase was as high as 15%. The 1996 and
1997 average prices are by far the highest realized by the industry since
1985. The 1998 average price is expected to remain above the $2.00 per
MMBTU level, however some early signs indicate that the prices will be
softer in 1998 than they were in 1997. Forecasts for a mild winter and the
lack of gas storage withdrawals are fueling speculation that the U.S. has
an excess supply of gas thus driving the prices down to the early 1996
levels.

Following is a table of the ratios of revenues received from oil and gas
production for the last three years:

Oil Gas

1997 85% 15%
1996 82% 18%
1995 84% 16%

As the table indicates, the majority of the Partnership's revenue is from
its oil production; therefore, Partnership revenues will be highly
dependent upon the future prices and demands for oil.

Seasonality of Business
Although the demand for natural gas is highly seasonal, with higher demand
in the colder winter months and in very hot summer months, the Partnership
has been able to sell all of its natural gas, either through contracts in
place or on the spot market at the then prevailing spot market price. As a
result, the volumes sold by the Partnership have not fluctuated materially
with the change of season.


Customer Dependence
No material portion of the Partnership's business is dependent on a single
purchaser, or a very few purchasers, where the loss of one would have a
material adverse impact on the Partnership. Two purchasers accounted for
83% of the Partnership's total oil and gas production during 1997: Navajo
Refining Company, Inc. 49%, and Scurlock Permian Corporation 34%. Three
purchasers accounted for 94% of the Partnership's total oil and gas
production during 1996: Navajo Refining Company, Inc. 48%, Scurlock
Permian Corporation 34% and Aquila Southwest Pipeline Corporation 12%. Two
purchasers accounted for 85% of the Partnership's total oil and gas
production during 1995: Navajo Refining Company and Scurlock Permian
Corporation accounted for 59% and 26%, respectively. All purchasers of the
Partnership's oil and gas production are unrelated third parties. In the
event this purchaser were to discontinue purchasing the Partnership's
production, the Managing General Partner believes that a substitute
purchaser or purchasers could be located without undue delay. No other
purchaser accounted for an amount equal to or greater than 10% of the
Partnership's total oil and gas production.

Competition
Because the Partnership has utilized all of its funds available for the
acquisition of interests in producing oil and gas properties or drilling
operations, it is not subject to competition from other oil and gas
property purchasers. See Item 2, Properties.

Factors that may adversely affect the Partnership include delays in
completing arrangements for the sale of production, availability of a
market for production, rising operating costs of producing oil and gas and
complying with applicable water and air pollution control statutes,
increasing costs and difficulties of transportation, and marketing of
competitive fuels. Moreover, domestic oil and gas must compete with
imported oil and gas and with coal, atomic energy, hydroelectric power and
other forms of energy.

Oil and Gas Production - The production and sale of oil and gas is subject
to federal and state governmental regulation in several respects, such as
existing price controls on natural gas and possible price controls on crude
oil, regulation of oil and gas production by state and local governmental
agencies, pollution and environmental controls and various other direct and
indirect regulation. Many jurisdictions have periodically imposed
limitations on oil and gas production by restricting the rate of flow for
oil and gas wells below their actual capacity to produce and by imposing
acreage limitations for the drilling of wells. The federal government has
the power to permit increases in the amount of oil imported from other
countries and to impose pollution control measures.


Various aspects of the Partnership's oil and gas activities are regulated
by administrative agencies under statutory provisions of the states where
such activities are conducted and by certain agencies of the federal
government for operations on Federal leases. Moreover, certain prices at
which the Partnership may sell its natural gas production are controlled by
the Natural Gas Policy Act of 1978, the Natural Gas Wellhead Decontrol Act
of 1989 and the regulations promulgated by the Federal Energy Regulatory
Commission.

Environmental - The Partnership's oil and gas activities are subject to
extensive federal, state and local laws and regulations governing the
generation, storage, handling, emission, transportation and discharge of
materials into the environment. Governmental authorities have the power to
enforce compliance with their regulations, and violations carry substantial
penalties. This regulatory burden on the oil and gas industry increases
its cost of doing business and consequently affects its profitability. The
Managing General Partner is unable to predict what, if any, effect
compliance will have on the Partnership.

Industry Regulations and Guidelines - Certain industry regulations and
guidelines apply to the registration, qualification and operation of oil
and gas programs in the form of limited partnerships. The Partnership is
subject to these guidelines which regulate and restrict transactions
between the Managing General Partner and the Partnership. The Partnership
complies with these guidelines and the Managing General Partner does not
anticipate that continued compliance will have a material adverse effect on
Partnership operations.

Partnership Employees
The Partnership has no employees; however, the Managing General Partner has
a staff of geologists, engineers, accountants, landsmen and clerical staff
who engage in Partnership activities and operations and perform additional
services for the Partnership as needed. In addition to the Managing
General Partner's staff, the Partnership engages independent consultants
such as petroleum engineers and geologists as needed. As of December 31,
1997 there were 130 individuals directly employed by the Managing General
Partner in various capacities.

Item 2. Properties

In determining whether an interest in a particular property was to be
acquired, the Managing General Partner considered such criteria as
estimated oil and gas reserves, estimated drilling costs, estimated cash
flow from the sale of production, present and future prices of oil and gas,
the extent of undeveloped and unproved reserves, the potential for
secondary, tertiary and other enhanced recovery projects and the
availability of markets.


As of December 31, 1997, the Partnership possessed an interest in oil and
gas properties located in Eddy County of New Mexico and Rains, Van Zandt
and Ward County of Texas. These properties consist of various interests in
4 wells.

Due to the Partnership's objective of maintaining current operations
without engaging in the drilling of any developmental or exploratory wells,
or additional acquisitions of producing properties, there has not been any
significant changes in properties during 1997, 1996 and 1995.

Significant Properties
The following table reflects the significant properties in which the
Partnership has an interest:

Date
Purchased No. of Proved Reserves*
Name and Location and Interest Wells Oil (bbls) Gas (mcf)
- ----------------- ------------ ----- ---------- ---------

Carson F #1 6/92 1 23,723 16,606
Ward County, 89%
Texas working
interest

Dagger Draw A #1 11/92 2 28,143 46,084
Eddy County, 45%
New Mexico working
interest

*The reserve estimates were prepared as of January 1, 1998, by Donald R.
Creamer, P.E., an independent registered petroleum engineer. The reserve
estimates were made in accordance with guidelines established by the
Securities and Exchange Commission pursuant to Rule 4-10(a) of Regulation S-
X. Such guidelines require oil and gas reserve reports be prepared under
existing economic and operating conditions with no provisions for price and
cost escalation except by contractual arrangements.

The New York Mercantile Exchange price at December 31, 1997 of $17.64 was
used as the beginning basis for the oil price. Oil price adjustments from
$17.64 per barrel were made in the individual evaluations to reflect oil
quality, gathering and transportation costs. The results are an average
price received at the lease of $17.53 per barrel in the preparation of the
reserve report as of January 1, 1998.


In the determination of the gas price, the New York Mercantile Exchange
price at December 31, 1997 of $2.26 was used as the beginning basis. Gas
price adjustments from $2.26 per Mcf were made in the individual
evaluations to reflect BTU content, gathering and transportation costs and
gas processing and shrinkage. The results are an average price received at
the lease of $2.23 per Mcf in the preparation of the reserve report as of
January 1, 1998.

As also discussed in Part II, Item 7, Management's Discussion and Analysis
of Financial Condition and Results of Operations, oil and gas prices were
subject to frequent changes in 1997.

The evaluation of oil and gas properties is not an exact science and
inevitably involves a significant degree of uncertainty, particularly with
respect to the quantity of oil or gas that any given property is capable of
producing. Estimates of oil and gas reserves are based on available
geological and engineering data, the extent and quality of which may vary
in each case and, in certain instances, may prove to be inaccurate.
Consequently, properties may be depleted more rapidly than the geological
and engineering data have indicated.

Unanticipated depletion, if it occurs, will result in lower reserves than
previously estimated; thus an ultimately lower return for the Partnership.
Basic changes in past reserve estimates occur annually. As new data is
gathered during the subsequent year, the engineer must revise his earlier
estimates. A year of new information, which is pertinent to the estimation
of future recoverable volumes, is available during the subsequent year
evaluation. In applying industry standards and procedures, the new data
may cause the previous estimates to be revised. This revision may increase
or decrease the earlier estimated volumes. Pertinent information gathered
during the year may include actual production and decline rates, production
from offset wells drilled to the same geologic formation, increased or
decreased water production, workovers, and changes in lifting costs, among
others. Accordingly, reserve estimates are often different from the
quantities of oil and gas that are ultimately recovered.

The Partnership has reserves which are classified as proved developed
producing and proved developed non-producing. All of the proved reserves
are included in the engineering reports which evaluate the Partnership's
present reserves.

Item 3. Legal Proceedings

There are no material pending legal proceedings to which the Partnership is
a party.

Item 4. Submission of Matters to a Vote of Security Holders

No matter was submitted to a vote of security holders during the fourth
quarter of 1997 through the solicitation of proxies or otherwise.


Part II


Item 5. Market for the Registrant's Common Equity and Related Stockholder
Matters

Market Information
Investor partner interests, or units, in the Partnership were initially
offered and sold for a price of $1,000. Investor partner units are not
traded on any exchange and there is no public or organized trading market
for them. Further, a transferee may not become a substitute limited or
general partner without the consent of the Managing General Partner.

Each Additional General Partner interest, whom elected at the time of
subscription into the Partnership, has been converted into a limited
partner effective January 1, 1994.

The Managing General Partner has the right, but not the obligation, to
purchase limited partnership units should an investor desire to sell. The
value of the unit is determined by adding the sum of (1) current assets
less liabilities and (2) the present value of the future net revenues
attributable to proved reserves and by discounting the future net revenues
at a rate not in excess of the prime rate charged by NationsBank, N.A. of
Midland, Texas plus one percent (1%), which value shall be further reduced
by a risk factor discount of no more than one-third (1/3) to be determined
by the Managing General Partner in its sole and absolute discretion. As of
December 31, 1997, 1996 and 1995, no limited partner units were purchased
by the Managing General Partner.

Number of Limited and General Partner Interest Holders
As of December 31, 1997, there were 99 holders of limited partner units and
no holders of general partner units in the Partnership.

Distributions
Pursuant to Article IV, Section 4.01 of the Partnership's Certificate and
Agreement of Limited Partnership "Net Cash Flow" is distributed to the
partners on a monthly basis. "Net Cash Flow" is defined as "the cash
generated by the Partnership's drilling activities, less (i) General and
Administrative Costs, (ii) Operating Costs, and (iii) any reserves
necessary to meet current and anticipated needs of the Partnership,
including, but not limited to drilling cost overruns, as determined in the
sole discretion of the Managing General Partner."


During 1997, twelve monthly distributions were made totaling $290,000, with
$258,100 distributed to the investor partners and $31,900 to the Managing
General Partner. For the year ended December 31, 1997, distributions of
$225.51 per investor partner unit were made, based upon 1,144.50 investor
partner units outstanding. During 1996, twelve monthly distributions were
made totaling $253,000, with $225,170 distributed to the investor partners
and $27,830 to the Managing General Partner. For the year ended December
31, 1996, distributions of $196.74 per investor partner unit were made,
based upon 1,144.5 investor partner units outstanding. For the period
ended December 31, 1995, twelve monthly distributions were made totaling
$111,000 with $98,790 distributed to the investor partners and $12,210 to
the Managing General Partner. For the period ended December 31, 1995,
distributions of $86.32 per investor partner unit were made, based upon
1,144.5 investor partner units outstanding.

Item 6. Selected Financial Data

The following selected financial data for the years ended December 31,
1997, 1996, 1995, 1994 and 1993 should be read in conjunction with the
financial statements included in Item 8:

Years ended December 31,
-----------------------------------------------------
Restated
1997 1996 1995 1994 1993
---- ---- ---- ---- ----
Revenues $ 307,526 480,994 276,584 383,345 351,073

Net income (loss) 126,704 278,970 40,828 98,047 (321,798)

Partners' share of
net income (loss):

Managing General
Partner 20,529 38,903 14,247 23,841 20,224

Investor partners 106,175 240,067 26,581 74,206 (342,022)

Investor partners'
net income (loss)
per unit 92.77 209.76 23.22 64.84 (298.84)

Investor partners'
cash distributions
per unit 225.51 196.74 86.32 138.42 137.42

Total assets $ 236,923 399,872 373,960 447,164 524,552


Item 7. Management's Discussion and Analysis of Financial Condition and
Results of Operations

General
Southwest Developmental Drilling Fund 91-A, L.P. was organized as a
Delaware limited partnership on January 7, 1991. The offering of limited
and general partner interests began on September 17, 1991 as part of a
shelf offering registered under the name Southwest Developmental Drilling
Program 1991-92. Minimum capital requirements for the Partnership were met
on April 22, 1992, with the offering of limited and general partner
interests concluding on April 30, 1992, with total investor partner
contributions of $1,144,500. The Managing General Partner made a
contribution to the capital of the Partnership at the conclusion of its
offering period in an amount equal to 1% of its net capital contributions.
The Managing General Partner contribution was $9,800. Total capital
contributions were $1,154,300.

The Partnership was formed to engage primarily in the business of drilling
developmental and exploratory wells, to produce and market crude oil and
natural gas produced from such properties, to distribute any net proceeds
from operations to the general and limited partners and to the extent
necessary, acquire leases which contain drilling prospects. Net revenues
will not be reinvested in other revenue producing assets except to the
extent that performance of remedial work is needed to improve a well's
producing capabilities. The economic life of the Partnership thus depends
on the period over which the Partnership's oil and gas reserves are
economically recoverable.

Based on current conditions, management anticipates a normal decline for
the life of these properties.



Results of Operations

A. General Comparison of the Years Ended December 31, 1997 and 1996,
Restated

The following table provides certain information regarding performance
factors for the years ended December 31, 1997 and 1996:

Year Ended
December 31, Percentage
Restated Increase
1997 1996 (Decrease)
---- ---- ---------

Average price per barrel of oil $ 20.10 20.88 (4%)
Average price per mcf of gas $ 2.14 2.40 (11%)
Oil production in barrels 12,900 18,700 (31%)
Gas production in mcf 21,200 36,800 (43%)
Gross oil and gas revenue $ 304,617 478,785 (37%)
Net oil and gas revenue $ 201,996 370,034 (46%)
Partnership distributions $ 290,000 253,000 15%
Limited partner distributions $ 258,100 225,170 15%
Per unit distribution to limited partners $ 225.51 196.74 15%
Number of limited partner units 1,144.5 1,144.5

Revenues

The Partnership's oil and gas revenues decreased to $304,617 from $478,785
for the years ended December 31, 1997 and 1996, respectively, a decrease of
37%. The principal factors affecting the comparison of the years ended
December 31, 1997 and 1996 are as follows:

1. The average price for a barrel of oil received by the Partnership
decreased during the year ended December 31, 1997 as compared to the
year ended December 31, 1996 by 4%, or $.78 per barrel, resulting in a
decrease of approximately $14,580 in revenues. Oil sales represented
85% of total oil and gas sales during the year ended December 31, 1997
as compared to 82% during the year ended December 31, 1996.

The average price for an mcf of gas received by the Partnership
decreased during the same period by 11%, or $.26 per mcf, resulting in
a decrease of approximately $9,560 in revenues.

The total decrease in revenues due to the change in prices received
from oil and gas production is approximately $24,140. The market price
for oil and gas has been extremely volatile over the past decade and
management expects a certain amount of volatility to continue in the
foreseeable future.


2. Oil production decreased approximately 5,800 barrels or 31% during the
year ended December 31, 1997 as compared to the year ended December 31,
1996, resulting in a decrease of approximately $116,580 in revenues.

Gas production decreased approximately 15,600 mcf or 43% during the
same period, resulting in a decrease of approximately $33,400 in
revenues.

The total decrease in revenues due to the change in production is
approximately $149,980. The decrease in production is due to normal
decline.

Costs and Expenses

Total costs and expenses decreased to $180,822 from $202,024 for the years
ended December 31, 1997 and 1996, respectively, a decrease of 11%. The
decrease is the result of lower lease operating costs, general and
administrative expense and depletion expense.

1. Lease operating costs and production taxes were 6% lower, or
approximately $6,000 less during the year ended December 31, 1997 as
compared to the year ended December 31, 1996.

2. General and administrative costs consist of independent accounting and
engineering fees, computer services, postage, and Managing General
Partner personnel costs. General and administrative costs decreased 2%
or approximately $300 during the year ended December 31, 1997 as
compared to the year ended December 31, 1996.

3. Depletion expense decreased to $58,000 for the year ended December 31,
1997 from $67,000 for the same period in 1996. This represents a
decrease of 14%. Depletion is calculated using the units of revenue
method of amortization based on a percentage of current period gross
revenues to total future gross oil and gas revenues, as estimated by
the Partnership's independent petroleum consultants.

A contributing factor to the decline in depletion expense between the
comparative periods was the impact of revisions of previous estimates
on reserves. Revisions of previous estimates can be attributed to the
changes in production performance, oil and gas price and production
costs. The impact of the revision would have increased depletion
expense approximately $8,000 as of December 31, 1996.



Results of Operations

B. General Comparison of the Year Ended December 31, 1996 Restated and
1995

The following table provides certain information regarding performance
factors for the years ended December 31, 1996 and 1995:

Year Ended Percentage
December 31,
Increase
Restated
1996 1995 (Decrease)
---- ---- ----------

Average price per barrel of oil $ 20.88 17.63 18%
Average price per mcf of gas $ 2.40 1.90 26%
Oil production in barrels 18,700 13,200 42%
Gas production in mcf 36,800 22,900 61%
Gross oil and gas revenue $ 478,785 275,628 74%
Net oil and gas revenue $ 370,034 147,505 151%
Partnership distributions $ 253,000 111,000 128%
Investor partner distributions $ 225,170 98,790 128%
Per unit distribution to
investor partners $ 196.74 86.32 128%
Number of investor partner units 1,144.50 1,144.50

Revenues

The Partnership's oil and gas revenues increased to $478,785 from $275,628
for the years ended December 31, 1996 and 1995, respectively, an increase
of 74%. The principal factors affecting the comparison of the years ended
December 31, 1996 and 1995 are as follows:

1. The average price for a barrel of oil received by the Partnership
increased during the year ended December 31, 1996 as compared to the
year ended December 31, 1995 by 18%, or $3.25 per barrel, resulting in
an increase of approximately $42,900 in revenues. Oil sales
represented 82% of total oil and gas sales during the year ended
December 31, 1996 as compared to 84% during the year ended December 31,
1995.

The average price for an mcf of gas received by the Partnership
increased during the same period by 26%, or $.50 per mcf, resulting in
an increase of approximately $11,500 in revenues.

The total increase in revenues due to the change in prices received
from oil and gas production is approximately $54,400. The market price
for oil and gas has been extremely volatile over the past decade, and
management expects a certain amount of volatility to continue in the
foreseeable future.


2. Oil production increased approximately 5,500 barrels or 42% during the
year ended December 31, 1996 as compared to the year ended December 31,
1995, resulting in an increase of approximately $114,800 in revenues.

Gas production increased approximately 13,900 mcf or 61% during the
same period, resulting in an increase of approximately $33,400 in
revenues.

The total increase in revenues due to the change in production is
approximately $148,200. The increase is primarily a result of a
successful workover in 1996.

Costs and Expenses

Total costs and expenses decreased to $202,024 from $235,756 for the years
ended December 31, 1996 and 1995, respectively, a decrease of 15%. The
decrease is the result of lower lease operating costs, general and
administrative expense and depletion expense.

1. Lease operating costs and production taxes were 16% lower, or
approximately $19,400 less during the year ended December 31, 1996 as
compared to the year ended December 31, 1995.

2. General and administrative costs consist of independent accounting and
engineering fees, computer services, postage, and Managing General
Partner personnel costs. General and administrative costs decreased 2%
or approximately $400 during the year ended December 31, 1996 as
compared to the year ended December 31, 1995.

3. Depletion expense decreased to $67,000 for the year ended December 31,
1996 from $81,000 for the same period in 1995. This represents a
decrease of 18%. Depletion is calculated using the units of revenue
method of amortization based on a percentage of current period gross
revenues to total future gross oil and gas revenues, as estimated by
the Partnership's independent petroleum consultants.

A contributing factor to the decline in depletion expense between the
comparative periods was the increase in the price of oil and gas used
to determine the Partnership's reserves for January 1, 1997 as compared
to 1996. Another contributing factor was due to the impact of
revisions of previous estimates on reserves. Revisions of previous
estimates can be attributed to the changes in production performance,
oil and gas price and production costs. The impact of the revision
would have decreased depletion expense approximately $36,000 as of
December 31, 1995.


C. Revenue and Distribution Comparison

Partnership net income for the years ended December 31, 1997, 1996 and 1995
was $126,704, $278,970 and $40,828, respectively. Excluding the effects of
depreciation, depletion and amortization, net income for the years ended
December 31, 1997, 1996 and 1995 was $186,627, $353,662 and $129,520,
respectively. Correspondingly, Partnership distributions for the years
ended December 31, 1997, 1996 and 1995 were $290,000, $253,000 and
$111,000, respectively. These differences are indicative of the changes in
oil and gas price, production and property during 1997, 1996 and 1995.

The sources for the 1997 distributions of $290,000 were oil and gas
operations of approximately $229,500 and the change in oil and gas
properties of approximately $(9,400), with the balance from available cash
on hand at the beginning of the period. The sources for the 1996
distributions of $253,000 were oil and gas operations of approximately
$320,800, offset additions to oil and gas properties of approximately
$(46,000), resulting in excess cash for contingencies or subsequent
distributions. The sources for the 1995 distributions of $111,000 were
operating activities of approximately $149,400 and property sales of
approximately $1,700, offset by additions to oil and gas property of
approximately $6,100, resulting in excess cash for contingencies or
subsequent distributions.

Total distributions during the year ended December 31, 1997 were $290,000
of which $258,100 was distributed to the investor partners and $31,900 to
the Managing General Partner. The per unit distribution to investor
partners during the same period was $225.51. Total distributions during
the year ended December 31, 1996 were $253,000 of which $225,170 was
distributed to the investor partners and $27,830 to the Managing General
Partner. The per unit distribution to investor partners during the same
period was $196.74. Total distributions during the year ended December 31,
1995 were $111,000 of which $98,790 was distributed to the investor
partners and $12,210 to the Managing General Partner. The per unit
distribution to investor partners during the same period was $86.32.

Since inception of the Partnership, cumulative monthly cash distributions
of $1,087,240 have been made to the partners. As of December 31, 1997,
$969,555 or $847.14 per investor partner unit, has been distributed to the
investor partners, representing a 85% return of the capital contributed.


Liquidity and Capital Resources

The primary source of cash is from operations, the receipt of income from
oil and gas properties. The Partnership anticipates the primary source of
cash to continue being from the oil and gas operations.

The December 31, 1997 NYMEX oil price of $17.64 dropped to $14.32 as of
March 18, 1998. The price decline in the first quarter of 1998 could cause
a material write down in oil and gas properties and a possible reduction in
future distributions to investors.

Cash flows provided by operating activities were approximately $229,500 in
1997 compared to $320,800 in 1996 and approximately $149,400 in 1995. The
primary source of the 1997 cash flow from operating activities was
profitable operations.

Cash flows used by investing activities were approximately $9,400 in 1997
compared to $46,300 in 1996 and approximately $4,400 in 1995. The principal
use of the 1997 cash flow from investing activities was additions to oil
and gas properties.

Cash flows used in financing activities were approximately $289,600 in 1997
compared to $253,100 in 1996 and approximately $110,900 in 1995. The only
use in the 1997 financing activities was the distributions to partners.

As of December 31, 1997, the Partnership had approximately $20,800 in
working capital. The Managing General Partner knows of no unusual
contractual commitments and believes the revenue generated from operations
are adequate to meet the needs of the Partnership.

Information Systems for the Year 2000

The Managing General Partner provides all data processing needs of the
Partnership. The Managing General Partner has reviewed and evaluated its
information systems to determine if its systems accurately process data
referencing the year 2000. Primarily all necessary programming
modifications to correct year 2000 referencing in the Managing General
Partners internal accounting and operating systems have been made to-date.
However the Managing General Partner has not completed its evaluation of
its vendors and suppliers systems to determine the effect, if any, the non-
compliance of such systems would have on the operation of the Managing
General Partner or the operations of the Partnership.



Item 8. Financial Statements and Supplementary Data

Index to Financial Statements

Page

Independent Auditors Reports 19

Balance Sheets 21

Statements of Operations 22

Statement of Changes in Partners' Equity 23

Statements of Cash Flows 24

Notes to Financial Statements 26











INDEPENDENT AUDITORS REPORT

The Partners
Southwest Developmental Drilling
Fund 91-A, L.P.
(A Delaware Limited Partnership):


We have audited the accompanying balance sheet of Southwest Developmental
Drilling Fund 91-A, L.P. (the "Partnership") as of December 31, 1997, and
the related statement of operations, changes in partners' equity and cash
flows for the year then ended. These financial statements are the
responsibility of the Partnership's management. Our responsibility is to
express an opinion on these financial statements based on our audit.

We conducted our audit in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles
used and significant estimates made by management, as well as evaluating
the overall financial statement presentation. We believe that our audit
provides a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Southwest Developmental
Drilling Fund 91-A, L.P. as of December 31, 1997 and the results of its
operations and its cash flows for the year then ended in conformity with
generally accepted accounting principles.



KPMG Peat Marwick LLP



Midland, Texas
March 18, 1998












REPORT OF INDEPENDENT ACCOUNTANTS


To the Partners
Southwest Developmental Drilling
Fund 91-A, L.P.
(A Delaware Limited Partnership)

We have audited the accompanying balance sheet of Southwest Developmental
Drilling Fund 91-A, L.P. as of December 31, 1996 and the related statements
of operations, changes in partners' equity and cash flows for the years
ended December 31, 1996 and 1995. These financial statements are the
responsibility of the partnership's management. Our responsibility is to
express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free
of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles
used and significant estimates made by management, as well as evaluating
the overall financial statement presentation. We believe that our audits
provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Southwest Developmental
Drilling Fund 91-A, L.P. as of December 31, 1996 and the results of its
operations and its cash flows for the years ended December 31, 1996 and
1995, in conformity with generally accepted accounting principles.


JOSEPH DECOSIMO AND COMPANY
A Tennessee Registered Limited Liability
Partnership


Chattanooga, Tennessee
March 14, 1997, except for note 7,
as to which the date is March 25, 1998


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)
Balance Sheets
December 31, 1997 and 1996

Restated
1997 1996
---- ----

Assets

Current assets:
Cash and cash equivalents $ 3,477 72,991
Receivable from Managing General Partner 17,702 60,583

- --------- ---------
Total current assets
21,179 133,574

- --------- ---------
Oil and gas properties - using the full-
cost method of accounting 1,075,744 1,066,375
Less accumulated depreciation,
depletion and amortization
860,000 802,000

- --------- ---------
Net oil and gas properties
215,744 264,375

- --------- ---------
Organization costs, net of amortization of
$0 and $36,537 for 1997 and 1996 - 1,923

- --------- ---------
$
236,923 399,872

========= =========
Liabilities and Partners' Equity

Current liability - Distribution payable $ 347 -

- --------- ---------
Partners' equity:

Managing General Partner 20,686 32,057

Investor partners 215,890 367,815

- --------- ---------
Total partners' equity
236,576 399,872

- --------- ---------
$
236,923 399,872

========= =========


















The accompanying notes are an integral
part of these financial statements.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)
Statements of Operations
For the years ended December 31, 1997, 1996 and 1995


Restated
1997 1996 1995
---- ---- ----

Revenues

Oil and gas sales $ 304,617 478,785 275,628
Interest income from operations 2,909 2,209 956
-------
- ------- -------
307,526
480,994 276,584
-------
- ------- -------
Expenses

Production 102,621 108,751 128,123
General and administrative 18,278 18,581 18,941
Depreciation, depletion and amortization 59,923 74,692 88,692
-------
- ------- -------
180,822
202,024 235,756
-------
- ------- -------
Net income $ 126,704 278,970 40,828
=======
======= =======
Net income allocated to:

Managing General Partner $ 20,529 38,903 14,247
=======
======= =======
Investor partners $ 106,175 240,067 26,581
=======
======= =======
Per investor partner unit $ 92.77 209.76 23.22
=======
======= =======


























The accompanying notes are an integral
part of these financial statements.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)
Statement of Changes in Partners' Equity
For the years ended December 31, 1997, 1996 and 1995


Managing
General Investor
Partner Partners Total
------- -------- -----

Balance at December 31, 1994 $ 18,947 425,127 444,074

Net income 14,247 26,581 40,828

Distributions (12,210) (98,790)(111,000)
-------
- -------- --------
Balance at December 31, 1995 20,984 352,918 373,902

Net income 38,903 240,067 278,970

Distributions (27,830) (225,170)(253,000)
-------
- -------- --------
Balance at December 31, 1996, Restated 32,057 367,815 399,872

Net income 20,529 106,175 126,704

Distributions (31,900) (258,100)(290,000)
-------
- -------- --------
Balance at December 31, 1997 $ 20,686 215,890 236,576
=======
======== ========






























The accompanying notes are an integral
part of these financial statements.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)
Statements of Cash Flows
For the years ended December 31, 1997, 1996 and 1995


Restated
1997 1996 1995
---- ---- ----

Cash flows from operating activities:

Cash received from oil and gas sales $ 343,716 447,823 300,039
Cash paid to Managing General Partner
for administrative fees and general
and administrative overhead
(117,118) (129,254)(151,593)
Interest received 2,909 2,209 956
--------
- -------- --------
Net cash provided by operating activities 229,507 320,778
149,402
--------
- -------- --------
Cash flows from investing activities:

Additions to oil and gas properties (9,368) (46,330) (6,105)
Sale of oil and gas properties - - 1,659
--------
- -------- --------
Net cash used in investing activities (9,368) (46,330) (4,446)
--------
- -------- --------
Cash flows used in financing activities:

Distributions to partners (289,653) (253,058)(110,942)
--------
- -------- --------
Net increase in cash and cash equivalents (69,514) 21,390 34,014

Beginning of period 72,991 51,601 17,587
--------
- -------- --------
End of period $ 3,477 72,991 51,601
========
======== ========


(continued)






















The accompanying notes are an integral
part of these financial statements.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)
Statements of Cash Flows, continued
Years ended December 31, 1997, 1996 and 1995


Restated
1997 1996 1995
---- ---- ----

Reconciliation of net income to net cash
provided by operating activities:

Net income $ 126,704 278,970 40,828

Adjustments to reconcile net income to net
cash provided by operating activities:

Depreciation, depletion and amortization 59,923 74,692
88,692
(Increase) decrease in receivables 39,099 (30,962) 24,411
Increase (Decrease) in payables 3,781 (1,922) (4,529)
-------
- ------- -------
Net cash provided by operating activities $ 229,507 320,778 149,402
=======
======= =======





































The accompanying notes are an integral
part of these financial statements.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


1. Organization
Southwest Developmental Drilling Fund 91-A, L.P. was organized under
the laws of the state of Delaware on January 7, 1991 for the purpose
of drilling developmental and exploratory wells and to produce and
market crude oil and natural gas produced from such properties for a
term of 50 years, unless terminated at an earlier date as provided for
in the Partnership Agreement. The Partnership sells its oil and gas
production to a variety of purchasers with the prices it receives
being dependent upon the oil and gas economy. Southwest Royalties,
Inc. serves as the Managing General Partner. Revenues, costs and
expenses are allocated as follows:

Managing
General Investor
Partner Partners
-------- --------
Interest income on capital contributions - 100%
Oil and gas sales* 11% 89%
All other revenues* 11% 89%
Organization and offering costs (1) - 100%
Syndication costs - 100%
Amortization of organization costs - 100%
Lease acquisition costs 1% 99%
Gain/loss on property disposition* 11% 89%
Operating and administrative costs*(2) 11% 89%
Depreciation, depletion and amortization
of oil and gas properties - 100%
Intangible drilling and development costs - 100%
All other costs* 11% 89%

*After the Investor Partners have received distributions totaling 150%
of their capital contributions, the allocation will change to 15%
Managing General Partner and 85% Investor Partners.

(1) All organization costs in excess of 4% of initial capital
contributions will be paid by the Managing General Partner and will be
treated as a capital contribution. The Partnership paid the Managing
General Partner an amount equal to 4% of initial capital contributions
for such organization costs.

(2) Administrative costs in any year which exceed 2% of capital
contributions shall be paid by the Managing General Partner and will
be treated as a capital contribution.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


2. Summary of Significant Accounting Policies

Oil and Gas Properties
Oil and gas properties are accounted for at cost under the full-cost
method. Under this method, all productive and nonproductive costs
incurred in connection with the acquisition, exploration and
development of oil and gas reserves are capitalized. Gain or loss on
the sale of oil and gas properties is not recognized unless
significant oil and gas reserves are involved.

The Partnership's policy for depreciation, depletion and amortization
of oil and gas properties is computed under the units of revenue
method. Under the units of revenue method, depreciation, depletion
and amortization is computed on the basis of current gross revenues
from production in relation to future gross revenues, based on current
prices, from estimated production of proved oil and gas reserves.

Under the units of revenue method, the Partnership computes the
provision by multiplying the total unamortized cost of oil and gas
properties by an overall rate determined by dividing (a) oil and gas
revenues during the period by (b) the total future gross oil and gas
revenues as estimated by the Partnership's independent petroleum
consultants. It is reasonably possible that those estimates of
anticipated future gross revenues, the remaining estimated economic
life of the product, or both could be changed significantly in the
near term due to the potential fluctuation of oil and gas prices or
production. The depletion estimate would also be affected by this
change.

Should the net capitalized costs exceed the estimated present value of
oil and gas reserves, discounted at 10%, such excess costs would be
charged to current expense. As of December 31, 1997, 1996 and 1995
the net capitalized costs did not exceed the estimated present value
of oil and gas reserves.

Estimates and Uncertainties
The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets and
liabilities and disclosure of contingent assets and liabilities at the
date of the financial statements and the reported amounts of revenues
and expenses during the reporting period. Actual results could differ
from those estimates.

Organization Costs
Organization costs are stated at cost and are amortized over sixty
months using the straight-line method.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


2. Summary of Significant Accounting Policies - continued

Syndication Costs
Syndication costs are accounted for as a reduction of partnership
equity.

Environmental Costs
The Partnership is subject to extensive federal, state and local
environmental laws and regulations. These laws, which are constantly
changing, regulate the discharge of materials into the environment and
may require the Partnership to remove or mitigate the environmental
effects of the disposal or release of petroleum or chemical substances
at various sites. Environmental expenditures are expensed or
capitalized depending on their future economic benefit. Costs which
improve a property as compared with the condition of the property when
originally constructed or acquired and costs which prevent future
environmental contamination are capitalized. Expenditures that relate
to an existing condition caused by past operations and that have no
future economic benefits are expensed. Liabilities for expenditures
of a non-capital nature are recorded when environmental assessment
and/or remediation is probable, and the costs can be reasonably
estimated.

Gas Balancing
The Partnership utilizes the sales method of accounting for gas-
balancing arrangements. Under this method the Partnership recognizes
sales revenue on all gas sold. As of December 31, 1997, 1996 and
1995, there were no significant amounts of imbalance in terms of units
and value.

Income Taxes
No provision for income taxes is reflected in these financial
statements, since the tax effects of the Partnership's income or loss
are passed through to the individual partners.

In accordance with the requirements of Statement of Financial
Accounting Standards No. 109, "Accounting for Income Taxes," the
Partnership's tax basis in its net oil and gas properties at December
31, 1997 and 1996 is $155,958 and $139,909, respectively, less than
that shown on the accompanying Balance Sheets in accordance with
generally accepted accounting principles.

Cash and Cash Equivalents
For purposes of the statement of cash flows, the Partnership considers
all highly liquid debt instruments purchased with a maturity of three
months or less to be cash equivalents. The Partnership maintains its
cash at one financial institution.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


2. Summary of Significant Accounting Policies - continued

Number of Investor Partner Units
As of December 31, 1997, 1996 and 1995, there were 1,144.5 investor
partner units outstanding held by 99 partners.

Concentrations of Credit Risk
The Partnership is subject to credit risk through trade receivables.
Although a substantial portion of its debtors' ability to pay is
dependent upon the oil and gas industry, credit risk is minimized due
to a large customer base. All partnership revenues are received by
the Managing General Partner and subsequently remitted to the
partnership and all expenses are paid by the Managing General Partner
and subsequently reimbursed by the partnership.

Fair Value of Financial Instruments
The carrying amount of cash and accounts receivable approximates fair
value due to the short maturity of these instruments.

Recent Accounting Pronouncements
In June 1997, the FASB issued "Reporting Comprehensive Income," SFAS
No. 130, which establishes standards for reporting and display of
comprehensive income and its components in a full set of general-
purpose financial statements. Specifically, this statements requires
that an enterprise (i) classify items of other comprehensive income by
their nature in a financial statement and (ii) display the accumulated
balance of other comprehensive income separately from retained
earnings and additional paid-in capital in the equity section of a
statement of financial position. This statement is effective for
fiscal years beginning after December 15, 1997. The Partnership
anticipates adoption of SFAS No. 130 in its year ended December 31,
1998 financial statements.

Comprehensive income consists of the change in equity of a business
enterprise during a period from transactions and other events and
circumstances from nonowner sources. Specifically, this includes net
income and other comprehensive income, which is made up of certain
changes in assets and liabilities that are not reported in a statement
of operations but are included in the balances within a separate
component of equity in a statement of financial position. Such
changes include, but are not limited to, unrealized gains for
marketable securities and futures contracts, foreign currency
translation adjustments and minimum pension liability adjustments.

Net Income (loss) per limited partnership unit
The net income (loss) per limited partnership unit is calculated by
using the number of outstanding limited partnership units.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


3. Commitments and Contingent Liabilities
The Managing General Partner has the right, but not the obligation, to
purchase limited partnership units should an investor desire to sell.
The value of the unit is determined by adding the sum of (1) current
assets less liabilities and (2) the present value of the future net
revenues attributable to proved reserves and by discounting the future
net revenues at a rate not in excess of the prime rate charged by
NationsBank, N.A. of Midland, Texas plus one percent (1%), which value
shall be further reduced by a risk factor discount of no more than one-
third (1/3) to be determined by the Managing General Partner in its
sole and absolute discretion.

The Partnership is subject to various federal, state and local
environmental laws and regulations which establish standards and
requirements for protection of the environment. The Partnership
cannot predict the future impact of such standards and requirements,
which are subject to change and can have retroactive effectiveness.
The Partnership continues to monitor the status of these laws and
regulations.

As of December 31, 1997, the Partnership has not been fined, cited or
notified of any environmental violations and management is not aware
of any unasserted violations which would have a material adverse
effect upon capital expenditures, earnings or the competitive position
in the oil and gas industry. However, the Managing General Partner
does recognize by the very nature of its business, material costs
could be incurred in the near term to bring the Partnership into total
compliance. The amount of such future expenditures is not reliably
determinable due to several factors, including the unknown magnitude
of possible contaminations, the unknown timing and extent of the
corrective actions which may be required, the determination of the
Partnership's liability in proportion to other responsible parties and
the extent to which such expenditures are recoverable from insurance
or indemnifications from prior owners of Partnership's properties.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


4. Related Party Transactions
A significant portion of the oil and gas properties in which the
Partnership has an interest are operated by and purchased from the
Managing General Partner. As is usual in the industry and as provided
for in the operating agreement for each respective oil and gas
property in which the Partnership has an interest, the operator is
paid an amount for administrative overhead attributable to operating
such properties, with such amounts to Southwest Royalties, Inc. as
operator approximating $12,000, $13,000 and $11,000 for the years
ended December 31, 1997, 1996 and 1995, respectively. In addition,
the Managing General Partner and certain officers and employees may
have an interest in some of the properties that the Partnership also
participates.

Certain subsidiaries or affiliates of the Managing General Partner
perform various oilfield services for properties in which the
Partnership owns an interest. Such services aggregated approximately
none, $6,600 and $5,000 for the years ended December 31, 1997, 1996
and 1995, respectively, and the Managing General Partner believes that
these costs are comparable to similar charges paid by the Partnership
to unrelated third parties.

Southwest Royalties, Inc., the Managing General Partner, was paid
$12,000 during 1997, 1996 and 1995 for indirect general and
administrative overhead expenses.

Receivables from Southwest Royalties, Inc., the Managing General
Partner, of approximately $17,702 and $60,583 are from oil and gas
production, net of lease operating costs and production taxes, as of
December 31, 1997 and 1996, respectively.

In addition, a director and officer of the Managing General Partner is
a partner in a law firm, with such firm providing legal services to
the Partnership approximating $30, $20 and $200 for the years ended
December 31, 1997, 1996 and 1995, respectively.

5. Major Customers
No material portion of the Partnership's business is dependent on a
single purchaser, or a very few purchasers, where the loss of one
would have a material adverse impact on the Partnership. Two
purchasers accounted for 83% of the Partnership's total oil and gas
production during 1997: Navajo Refining Company, Inc. 49%, and
Scurlock Permian Corporation 34%. Three purchasers accounted for 94%
of the Partnership's total oil and gas production during 1996: Navajo
Refining Company, Inc. 48%, Scurlock Permian Corporation 34% and
Aquila Southwest Pipeline Corporation 12%. Two purchasers accounted
for 85% of the Partnership's total oil and gas production during 1995:
Navajo Refining Company and Scurlock Permian Corporation accounted for
59% and 26%, respectively. All purchasers of the Partnership's oil
and gas production are unrelated third parties. In the event this
purchaser were to discontinue purchasing the Partnership's production,
the Managing General Partner believes that a substitute purchaser or
purchasers could be located without undue delay. No other purchaser
accounted for an amount equal to or greater than 10% of the
Partnership's total oil and gas production.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


6. Estimated Oil and Gas Reserves (unaudited)
The Partnership's interest in proved oil and gas reserves is as
follows:

Oil (bbls) Gas (mcf)
---------- ---------
Proved developed and undeveloped
reserves -

January 1, 1995 65,000 110,000

Revision of estimates in place (8,000) 11,000
Production (13,000) (23,000)
------- -------
December 31, 1995 44,000 98,000

Revisions of estimates in place 49,000 80,000
Production (19,000) (37,000)
------- -------
December 31, 1996 74,000 141,000

Revisions of estimates in place (6,000) (50,000)
Production (13,000) (21,000)
------- -------
December 31, 1997 55,000 70,000
======= =======

Proved developed reserves -

December 31, 1995 44,000 98,000
======= =======
December 31, 1996 66,000 129,000
======= =======
December 31, 1997 55,000 70,000
======= =======

All of the Partnership's reserves are located within the continental
United States.

*The reserve estimates were prepared as of January 1, 1998, by Donald
R. Creamer, P.E., an independent registered petroleum engineer. The
reserve estimates were made in accordance with guidelines established
by the Securities and Exchange Commission pursuant to Rule 4-10(a) of
Regulation S-X. Such guidelines require oil and gas reserve reports
be prepared under existing economic and operating conditions with no
provisions for price and cost escalation except by contractual
arrangements.

The New York Mercantile Exchange price at December 31, 1997 of $17.64
was used as the beginning basis for the oil price. Oil price
adjustments from $17.64 per barrel were made in the individual
evaluations to reflect oil quality, gathering and transportation
costs. The results are an average price received at the lease of
$17.53 per barrel in the preparation of the reserve report as of
January 1, 1998.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


6. Estimated Oil and Gas Reserves (unaudited) - continued
In the determination of the gas price, the New York Mercantile
Exchange price at December 31, 1997 of $2.26 was used as the beginning
basis. Gas price adjustments from $2.26 per Mcf were made in the
individual evaluations to reflect BTU content, gathering and
transportation costs and gas processing and shrinkage. The results
are an average price received at the lease of $2.23 per Mcf in the
preparation of the reserve report as of January 1, 1998.

The evaluation of oil and gas properties is not an exact science and
inevitably involves a significant degree of uncertainty, particularly
with respect to the quantity of oil or gas that any given property is
capable of producing. Estimates of oil and gas reserves are based on
available geological and engineering data, the extent and quality of
which may vary in each case and, in certain instances, may prove to be
inaccurate. Consequently, properties may be depleted more rapidly
than the geological and engineering data have indicated.

Unanticipated depletion, if it occurs, will result in lower reserves
than previously estimated; thus an ultimately lower return for the
Partnership. Basic changes in past reserve estimates occur annually.
As new data is gathered during the subsequent year, the engineer must
revise his earlier estimates. A year of new information, which is
pertinent to the estimation of future recoverable volumes, is
available during the subsequent year evaluation. In applying industry
standards and procedures, the new data may cause the previous
estimates to be revised. This revision may increase or decrease the
earlier estimated volumes. Pertinent information gathered during the
year may include actual production and decline rates, production from
offset wells drilled to the same geologic formation, increased or
decreased water production, workovers, and changes in lifting costs,
among others. Accordingly, reserve estimates are often different from
the quantities of oil and gas that are ultimately recovered.

The Partnership has reserves which are classified as proved developed
producing and proved developed non-producing. All of the proved
reserves are included in the engineering reports which evaluate the
Partnership's present reserves


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


6. Estimated Oil & Gas Reserves (unaudited) - continued
The standardized measure of discounted future net cash flows relating
to proved oil and gas reserves at December 31, 1997, 1996 and 1995 is
presented below:

1997 1996 1995
---- ---- ----

Future cash inflows $ 1,127,000 2,464,000 1,144,000
Production and development costs 565,000 983,000 664,000
--------- --------- ---------
Future net cash flows 562,000 1,481,000 480,000
10% annual discount for estimated
timing of cash flows 112,000 357,000 100,000
--------- --------- ---------
Standardized measure of discounted
future net cash flows $ 450,000 1,124,000 380,000
========= ========= =========

The principal sources of change in the standardized measure of
discounted future net cash flows for the years ended December 31,
1997, 1996 and 1995 are as follows:

1997 1996 1995
---- ---- ----

Sales of oil and gas produced,
net of production costs $ (202,000) (403,000) (211,000)
Changes in prices and production costs (472,000) 290,000
201,000
Changes of production rates
(timing) and others (19,000) 47,000 2,000
Revisions of previous
quantities estimates (93,000) 767,000 (244,000)
Accretion of discount 112,000 43,000 49,000
Discounted future net
cash flows -
Beginning of year 1,124,000 380,000 583,000
--------- -------- --------
End of year $ 450,000 1,124,000 380,000
========= ======== ========

Future net cash flows were computed using year-end prices and costs
that related to existing proved oil and gas reserves in which the
Partnership has mineral interests.


Southwest Developmental Drilling Fund 91-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


Note 7 - Prior Period adjustment

The Managing General Partner, who is a related party, incorrectly billed
the Partnership for property costs as workover expense on one lease during
March 1996. This error resulted in the understatement of previously
reported property costs and the overstatement of depletion expense in the
prior year. The error was corrected in the September 1997 10-Q. The
correction resulted in the following changes to partners' equity as of
December 31, 1996.

Managing
Investor General
Partners Partner
Equity Equity
--------- --------

As previously reported, December 31, 1996 $ 335,760 26,983

Property cost - 1996 41,055 5,074
Depletion expense - 1996 (9,000) -
--------- --------
December 31, 1996, as adjusted $ 367,815 32,057
========= ========

The following schedule shows the effect of the prior period adjustment,
before and after the restatement, to net income for the year ended December
31, 1996.

Before After
Prior Period Prior Period
Restatement Restatement
--------- --------
For the year ended December 31, 1996
Net income $ 241,841 278,970
Managing General Partner 33,829 38,903
Investor partners 208,012 240,067
Per investor partner unit 181.75 209.76




Item 9. Changes in and Disagreements With Accountants on Accounting and
Financial Disclosure

On June 9, 1997 Southwest Royalties, Inc. the Partnership's Managing
General Partner (Southwest Royalties, Inc.) dismissed Joseph Decosimo and
Company as the Partnership's independent accountants. The Managing General
Partner's Board of Directors approved the decision to change the
Partnership's independent accountants.

The reports of Joseph Decosimo and Company on the financial statements for
the past two fiscal years contained no adverse opinion or disclaimer of
opinion and were not qualified or modified as to uncertainty, audit scope
or accounting principle.

In connection with its audits for the two most recent fiscal years and
through June 9, 1997, there have been no disagreements with Joseph Decosimo
and Company on any matter of accounting principles or practices, financial
statements disclosure, or auditing scope or procedure, which disagreements
if not resolved to the satisfaction of Joseph Decosimo and Company would
have caused them to make reference thereto in their report on the financial
statements for such years.

The Registrant has requested that Joseph Decosimo and Company furnish it
with a letter addressed to the SEC stating whether or not is agrees with
the above statements. A copy of that letter is included as Exhibit 16 and
has been filled with the Securities and Exchange Commission.


Part III

Item 10. Directors and Executive Officers of the Registrant

Management of the Partnership is provided by Southwest Royalties, Inc., as
Managing General Partner. The names, ages, offices, positions and length
of service of the directors and executive officers of Southwest Royalties,
Inc. are set forth below. Each director and executive officer serves for a
term of one year. The present directors of the Managing General Partner
have served in their capacity since the Company's formation in 1983.

Name Age Position
- -------------------- --- -----------------------------------
- -------
H. H. Wommack, III 42 Chairman of the Board,
President,
Chief Executive Officer, Treasurer
and Director

H. Allen Corey 43 Secretary and Director

Bill E. Coggin 44 Vice President and Chief
Financial Officer

Phillip F. Hock, Jr. 54 Vice President, Exploration

Jon P. Tate 40 Vice President, Land and
Assistant Secretary

Joel D. Talley 36 Vice President, Acquisitions and
Exploitation Manager

R. Douglas Keathley 42 Vice President, Operations

J. Steven Person 39 Vice President, Marketing

H. H. Wommack, III, is Chairman of the Board, President, Chief Executive
Officer, Treasurer, principal stockholder and a director of the Managing
General Partner, and has served as its President since the Company's
organization in August, 1983. Prior to the formation of the Company, Mr.
Wommack was a self-employed independent oil producer engaged in the
purchase and sale of royalty and working interests in oil and gas leases,
and the drilling of exploratory and developmental oil and gas wells. Mr.
Wommack holds a J.D. degree from the University of Texas from which he
graduated in 1980, and a B.A. from the University of North Carolina in
1977.

H. Allen Corey, a founder of the Managing General Partner, has served as
the Managing General Partner's secretary and a director since its
inception. Mr. Corey is President of Trolley Barn Brewery, Inc., a brew
pub restaurant chain based in the Southeast. Prior to his involvement with
Trolley Barn, Mr. Corey was a partner at the law firm of Miller & Martin in
Chattanooga, Tennessee. He is currently of counsel to the law firm of
Baker, Donelson, Bearman & Caldwell, with the offices in Chattanooga,
Tennessee. Mr. Corey received a J.D. degree from the Vanderbilt University
Law School and B.A. degree from the University of North Carolina at Chapel
Hill.


Bill E. Coggin, Vice President and Chief Financial Officer, has been with
the Managing General Partner since 1985. Mr. Coggin was Controller for Rod
Ric Corporation of Midland, Texas, an oil and gas drilling company, during
the latter part of 1984. He was Controller for C.F. Lawrence & Associates,
Inc., an independent oil and gas operator also of Midland, Texas during the
early part of 1984. Mr. Coggin taught public school for four years prior
to his business experience. Mr. Coggin received a B.S. in Education and a
B.B.A. in Accounting from Angelo State University.

Phillip F. Hock, Jr., Vice President, Exploration, assumed his
responsibilities with the Managing General Partner as a geologist in
November 1993. Prior to joining the Managing General Partner, Mr. Hock was
employed four (4) years by Ramco Oil and Gas as Exploitation Manager (1989-
1993), Robinson Brothers Drilling Company as Exploration Manager (1980-
1984), and as petroleum geologist by several companies throughout his
career, Magic Circle Oil and Gas (1988-1989), Reading and Bates Petroleum
Company (1984-1988), and Exxon (1971-1980). Mr. Hock received a B. S. in
Geology from Morehead State University and a M. S. in Geology form the
University of New Mexico.

Jon P. Tate, Vice President, Land and Assistant Secretary, assumed his
responsibilities with the Managing General Partner in 1989. Prior to
joining the Managing General Partner, Mr. Tate was employed by C.F.
Lawrence & Associates, Inc., an independent oil and gas company, as Land
Manager from 1981 through 1989. Mr. Tate is a member of the Permian Basin
Landman's Association and received his B.B.S. degree from Hardin-Simmons
University.

Joel D. Talley, Vice President, Acquisitions and Exploitation Manager,
assumed his responsibilities with the Managing General Partner on July 15,
1996. Prior to joining the Managing General Partner, Mr. Talley was
employed for four (4) years by Merit Energy Company as Acquisitions Manager
and then as Region Manager over West Texas, New Mexico and Wyoming (1992-
1996) and eight (8) years by ARCO Oil & Gas Company in various engineering
positions (1984-1992). Mr. Talley received his B.S. in Mechanical
Engineering in 1984 from Texas A&M University.

R. Douglas Keathley, Vice President, Operations, assumed his
responsibilities with the Managing General Partner as a Production Engineer
in October, 1992. Prior to joining the Managing General Partner, Mr.
Keathley was employed for four (4) years by ARCO Oil & Gas Company as
senior drilling engineer working in all phases of well production (1988-
1992), eight (8) years by Reading & Bates Petroleum Company as senior
petroleum engineer responsible for drilling (1980-1988) and two (2) years
by Tenneco Oil Company as drilling engineer responsible for all phases of
drilling (1978-1980). Mr. Keathley received his B.S. in Petroleum
Engineering in 1977 from the University of Oklahoma.

J. Steven Person, Vice President, Marketing, assumed his responsibilities
with the Managing General Partner as National Marketing Director in 1989.
Prior to joining the Managing General Partner, Mr. Person served as Vice
President of Marketing for CRI, Inc., and was associated with Capital
Financial Group and Dean Witter (1983). He received a B.B.A. from Baylor
University in 1982 and an M.D.A. from Houston Baptist University in 1987.



Key Employees

Accounting and Administrative Officer - Debbie A. Brock, age 45, assumed
her position with the Managing General Partner in 1991. Prior to joining
the Managing General Partner, Ms. Brock was employed with Western Container
Corporation as Accounting Manager (1982-1990), Synthetic Industries
(Texas), Inc. as Accounting Manager (1976-1982) and held various accounting
positions in the manufacturing industry (1971-1975). Ms. Brock received a
B.B.A. from the University of Houston.

Controller - Robert A. Langford, age 48, assumed his responsibilities with
the Managing General Partner in 1992. Mr. Langford received his B.B.A.
degree in Accounting in 1975 from the University of Central Arkansas.
Prior to joining the Managing General Partner, Mr. Langford was employed
with Forest Oil Corporation as Corporate Coordinator, Regional Coordinator,
Accounting Manager. He held various other positions from 1982-1992 and
1976-1980 and was Assistant Controller of National Oil Company from 1980-
1982.

Financial Reporting Manager - Bryan Dixon, C.P.A., age 31, assumed his
responsibilities with the Managing General Partner in 1992. Mr. Dixon
received his B.B.A. degree in Accounting in 1988 from Texas Tech University
in Lubbock, Texas. Prior to joining the Managing General Partner, Mr.
Dixon was employed as a Senior Auditor with Johnson, Miller & Company from
1991-1992 and Audit Supervisor for Texas Tech University and the Texas Tech
University Health Sciences Center from 1988-1991.

Production Superintendent - Steve C. Garner, age 56, assumed his
responsibilities with the Managing General Partner as Production
Superintendent in July, 1989. Prior to joining the Managing General
Partner, Mr. Garner was employed 16 years by Shell Oil Company working in
all phases of oil field production as operations foreman, one and one-half
years with Petroleum Corporation of Delaware as Production Superintendent,
six years as an independent engineering consultant, and one year with
Citation Oil & Gas Corp. as a workover, completion and production foreman.
Mr. Garner has worked extensively in the Permian Basin oil field for the
last 25 years.

Tax Manager - Carolyn Cookson, age 41, assumed her position with the
Managing General Partner in April, 1989. Prior to joining the Managing
General Partner, Ms. Cookson was employed as Director of Taxes at C.F.
Lawrence & Associates, Inc. from 1983 to 1989, and worked in public
accounting at McCleskey, Cook & Green, P.C. from 1981 to 1983 and Deanna
Brady, C.P.A. from 1980 to 1981. She is a member of the Permian Basin
Chapter of the Petroleum Accountants' Society, and serves on its Board of
Directors and is liaison to the Tax Committee. Ms. Cookson received a
B.B.A. in accounting from New Mexico State University.


Investor Relations Manager - Sandra K. Flournoy, age 51, came to Southwest
Royalties, Inc. in 1988 from Parker & Parsley Petroleum, where she was
Assistant Manager of Investor Services and Broker/Dealer Relations for two
years. Prior to that, Ms. Flournoy was Administrative Assistant to the
Superintendent at Greenwood ISD for four years.

In certain instances, the Managing General Partner will engage professional
petroleum consultants and other independent contractors, including
engineers and geologists in connection with property acquisitions,
geological and geophysical analysis, and reservoir engineering. The
Managing General Partner believes that, in addition to its own "in-house"
staff, the utilization of such consultants and independent contractors in
specific instances and on an "as-needed" basis allows for greater
flexibility and greater opportunity to perform its oil and gas activities
more economically and effectively.

Item 11. Executive Compensation

The Partnership does not have any directors or executive officers. The
executive officers of the Managing General Partner do not receive any cash
compensation, bonuses, deferred compensation or compensation pursuant to
any type of plan, from the Partnership. The Managing General Partner
received $12,000 during 1997, 1996 and 1995 as an annual administrative fee
for reimbursement of indirect general and administrative costs.

Item 12. Security Ownership of Certain Beneficial Owners and Management

There are no limited partners who own of record, or are known by the
Managing General Partner to beneficially own, more than five percent of the
Partnership's limited partnership interests.

The Managing General Partner owns an 11 percent interest as a Managing
General Partner.

No officer or director of the Managing General Partner owns Units in the
Partnership. There are no arrangements known to the Managing General
Partner which may at a subsequent date result in a change of control of the
Partnership.


Item 13. Certain Relationships and Related Transactions

In 1997, the Managing General Partner received $12,000 as an administrative
fee. This amount is part of the general and administrative expenses
incurred by the Partnership.

In some instances the Managing General Partner and certain officers and
employees may be working interest owners in an oil and gas property in
which the Partnership also has a working interest. Certain properties in
which the Partnership has an interest are operated by the Managing General
Partner, who was paid approximately $12,000 for administrative overhead
attributable to operating such properties during 1997.

The law firm of Baker, Donelson, Bearman & Caldwell, of which H. Allen
Corey, an officer and director of the Managing General Partner, is a
partner, is counsel to the Partnership. Baker, Donelson, Bearman &
Caldwell provided services totaling approximately $30 during the year ended
December 31, 1997, which constitutes an immaterial portion of that firm's
business.

In the opinion of management, the terms of the above transactions are
similar to ones with unaffiliated third parties.


Part IV


Item 14. Exhibits, Financial Statement Schedules and Reports on Form 8-K

(a)(1) Financial Statements:

Included in Part II of this report --

Reports of Independent Accountants
Balance Sheets
Statement of Operations
Statement of Changes in Partners' Equity
Statement of Cash Flows
Notes to Financial Statements

(2) Schedules required by Article 12 of Regulation S-
X are either omitted because they are not applicable or
because the required information is shown in the
financial statements or the notes thereto.

(3) Exhibits:

4 (a) Certificate of Limited
Partnership of Southwest Developmental Drilling
Fund 91-A, L.P., dated January 9, 1991.
(Incorporated by reference from Partnership's
Form 10-K for the fiscal year ended December 31,
1991.)

(b) Agreement of Limited
Partnership of Southwest Developmental Drilling
Fund 91-A, L.P. dated January 9, 1991.
(Incorporated by reference from Partnership's
Form 10-K for the fiscal year ended December 31,
1991.)

(c) Second Amended and Restated
Certificate of Limited Partnership of Southwest
Developmental Drilling Fund 91-A. L.P., dated as
of February 1, 1993. (Incorporated by reference
from Partnership's Form 10-K for the fiscal year
ended December 31, 1993.)

(d) Second Amended and Restated
Certificate of Limited Partnership of Southwest
Developmental Drilling Fund 91-A. L.P., dated as
of January 12, 1994. (Incorporated by reference
from Partnership's Form 10-K for the fiscal year
ended December 31, 1993.)

16 Letter on Changes in Certifying Accountant
(Incorporated by reference from Partnership's Form 8-K
dated June 9, 1997.)

27 Financial Data Schedule

(b) Reports on Form 8-K

There were no reports filed on Form 8-K during the
quarter ended December 31, 1997.


Signatures


Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Partnership has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.


Southwest Developmental Drilling Fund 91-
A, L.P.,
a Delaware limited partnership


By: Southwest Royalties, Inc.,
Managing
General Partner


By: /s/ H. H. Wommack, III
-----------------------------
H. H. Wommack, III, President


Date: March 31, 1998


Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below by the following persons on behalf of the
Partnership and in the capacities and on the dates indicated.


By: /s/ H. H. Wommack, III
-----------------------------------
H. H. Wommack, III, Chairman of the
Board, President, Chief Executive
Officer, Treasurer and Director


Date: March 31, 1998


By: /s/ H. Allen Corey
-----------------------------
H. Allen Corey, Secretary and
Director


Date: March 31, 1998