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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, 2000

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 0-18996

Southwest Oil & Gas Income Fund X-A, L.P.
(Exact name of registrant as specified in
its limited partnership agreement)

Delaware 75-2310854
(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 partnership 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 40. There is no
exhibit index.


Table of Contents

Item Page

Part I

1. Business 3

2. Properties 6

3. Legal Proceedings 9

4. Submission of Matters to a Vote of Security Holders 9

Part II

5. Market for Registrant's Common Equity and Related
Stockholder Matters 10

6. Selected Financial Data 11

7. Management's Discussion and Analysis of
Financial Condition and Results of Operations 12

8. Financial Statements and Supplementary Data 19

9. Changes in and Disagreements with Accountants
on Accounting and Financial Disclosure 34

Part III

10. Directors and Executive Officers of the Registrant 35

11. Executive Compensation 36

12. Security Ownership of Certain Beneficial Owners and
Management 36

13. Certain Relationships and Related Transactions 37

Part IV

14. Exhibits, Financial Statement Schedules, and Reports
on Form 8-K 39

Signatures 41


Part I


Item 1. Business

General
Southwest Oil & Gas Income Fund X-A, L.P. (the "Partnership" or
"Registrant") was organized as a Delaware limited partnership on January
29, 1990. The offering of limited partnership interests began May 11, 1990
as part of a shelf offering registered under the name Southwest Oil & Gas
1990-91 Income Program (the "Program"). Minimum capital requirements for
the Partnership were met on August 15, 1990, with the offering of limited
partnership interests concluding on November 30, 1990. The Partnership has
no subsidiaries.

The Partnership has acquired interests in producing oil and gas properties,
and produced and marketed the crude oil and natural gas produced from such
properties. In most cases, the Partnership purchased working interests in
oil and gas properties. The Partnership purchased either all or part of
the rights and obligations under various oil and gas leases.

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 92 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. H. H.
Wommack, III, a stockholder, director, President and Treasurer of the
Managing General Partner, is also a general partner. The Partnership has
no employees.

Principal Products, Marketing and Distribution
The Partnership has acquired and holds working interests in oil and gas
properties located in New Mexico and Texas. 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.


The year 2000 was a record year for crude oil prices. The world energy
markets witnessed a continuation of the 1999 recovery seeing prices in the
U.S. peak at $37 per barrel in September. Increasing demand and depleting
inventories appeared to be the motivators in crude's dramatic rise. At the
beginning of 2000, U.S. crude oil inventories were approximately 16% lower
than at the beginning of 1999 and summer vacationers made it through a
travel season that saw gasoline prices top $2 per gallon in some U.S.
markets. The lack of crude oil inventory in the U.S. was also magnified by
the colder than normal winter that much of the country experienced.
However, several production increases from OPEC coupled with President
Clinton's release of 30 million barrels of oil from the U.S. Strategic
Petroleum Reserve in September contributed to the slow in prices toward the
end of the year. After averaging $30 per barrel for the year and over $32
from August through November, oil prices closed out the year 2000 at $26.80
per barrel.

Tighter supplies, rising demand, and the return of more seasonal summer and
winter weather catapulted spot gas prices in 2000 to the highest levels
since the market was deregulated in the mid-1980's. Average monthly spot
prices rose an astounding 72.9% over 1999 levels to average $3.77/MMBTU.
The climb in prices was fairly steady throughout the year, with the first-
quarter spot prices averaging $2.44/MMBtu. After the winter season ended
with a huge storage deficit of 306 BCF, a combination of factors
contributed further to the upward trend in spot prices. As the summer
temperatures heated up and the rate of storage injections remained
sluggish, competition for gas supplies became fierce between power
generators and gas utilities attempting to refill storage. Spot prices
really took off in the fourth quarter as competition for storage gas in the
waning days of the refill season became supercharged. And then came weeks
of early heating-season cold, which caused gas utilities to scramble to
meet the heating loads. A year of record high prices was capped off in
December, with spot prices averaging $6.14/MMBtu, more than two-and-a-half
times the previous five-year December average of $2.43/MMBtu.

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

Oil Gas

2000 85% 15%
1999 86% 14%
1998 87% 13%

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. Four purchasers accounted for
85% of the Partnership's total oil and gas production during 2000: Plains
Marketing LP for 27%, Eaglewing Trading Inc. for 23%, Navajo Refining
Company for 22% and Phillips 66 for 13%. Three purchasers accounted for
73% of the Partnership's total oil and gas production during 1999:
Scurlock Permian Corporation for 27%, Navajo Refining Company for 26% and
Eaglewing Trading Inc. for 20%. Four purchasers accounted for 78% of the
Partnership's total oil and gas production during 1998: Scurlock Permian
Corporation for 33%, Navajo Refining Company for 21%, Eaglewing Trading
Inc. for 13% and Mobil Corporation for 11%. All purchasers of the
Partnership's oil and gas production are unrelated third parties. In the
event any of these purchasers were to discontinue purchasing the
Partnership's production, the Managing General Partner believes that a
substitute purchaser or purchasers could be located without delay. No
other purchaser accounted for an amount equal to or greater than 10% of the
Partnership's sales of 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, 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.

Regulation

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, landmen 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,
2000, there were 92 individuals directly employed by the Managing General
Partner in various capacities.

Item 2. Properties

In determining whether an interest in a particular producing property was
to be acquired, the Managing General Partner considered such criteria as
estimated oil and gas reserves, 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, 2000, the Partnership possessed an interest in oil and
gas properties located in Eddy and Lea Counties of New Mexico, Duval,
Hockley, Midland, Pecos, Runnels and Ward Counties of Texas. These
properties consist of various interests in approximately 170 wells and
units.


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 have not been any
significant changes in properties during 2000, 1999 and 1998.

There were no property sales during 2000. During 1999, nine leases were
sold for $42,770. During 1998, eight leases were sold for $67,800.

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)
- ----------------- ------------ ------ ---------- ---------

Texas Crude 12/90* at 17.5% 8 101,000 41,000
Acquisition to 50% working
Gaines, Hockley, interest
Terry and Culberson
Counties, Texas
Lea County, New
Mexico

*Per the terms of the purchase, the Partnership received production runs
from a period prior to the date of purchase.


*Ryder Scott Petroleum Engineers prepared the reserve and present value
data for the Partnership's existing properties as of January 1, 2001. 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, 2000 of $26.80 was
used as the beginning basis for the oil price. Oil price adjustments from
$26.80 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 $24.82 per barrel in the preparation of the
reserve report as of January 1, 2001.

In the determination of the gas price, the New York Mercantile Exchange
price at December 31, 2000 of $9.78 was used as the beginning basis. Gas
price adjustments from $9.78 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 $9.62 per Mcf in the preparation of the reserve report as of
January 1, 2001.

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 2000.

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, proved developed non-producing and proved undeveloped. All of
the proved reserves are included in the engineering reports which evaluate
the Partnership's present reserves.

Because the Partnership does not engage in drilling activities, the
development of proved undeveloped reserves in conducted pursuant to farm-
out arrangements with the Managing General Partner or unrelated third
parties. Generally, the Partnership retains a carried interest such as an
overriding royalty interest under the terms of a farm-out or receives cash.

The Partnership or the owners of properties in which the Partnership owns
an interest can engage in workover projects or supplementary recovery
projects, for example, to extract behind the pipe reserves which qualify as
proved developed non-producing reserves. See Part II, Item 7, Management's
Discussion and Analysis of Financial Condition and Results of Operations.

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 2000 through the solicitation of proxies or otherwise.


Part II


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

Market Information
Limited partnership interests, or units, in the Partnership were initially
offered and sold for a price of $500. Limited partner units are not traded
on any exchange and there is no public or organized trading market for
them. The Managing General Partner has become aware of certain limited and
sporadic transfers of units between limited partners and third parties, but
has no verifiable information regarding the prices at which such units have
been transferred. Further, a transferee may not become a substitute
limited partner without the consent of the Managing General Partner.

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. In
2000, no limited partner units were purchased by the Managing General
Partner. In 2000, 32 limited partner units were tendered to and purchased
by the Managing General Partner at an average base price of $13.75 per
unit. In 1999, 17 limited partner units were tendered to and purchased by
the Managing General Partner at an average base price of $22.57 per unit.
In 1998, 75 limited partner units were tendered to and purchased by the
Managing General Partner at an average base price of $18.77 per unit.

Number of Limited Partner Interest Holders
As of December 31, 2000, there were 564 holders of limited partner units in
the Partnership.

Distributions
Pursuant to Article III, Section 3.05 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 investments in producing oil and gas
properties, less (i) General and Administrative Costs, (ii) Operating
Costs, and (iii) any reserves necessary to meet current and anticipated
needs of the Partnership, as determined in the sole discretion of the
Managing General Partner."


During 2000, quarterly distributions were made totaling $74,026, with
$73,769 distributed to the limited partners. For the year ended December
31, 2000, distributions of $7.04 per limited partner unit were made, based
upon 10,484 limited partner units outstanding. Distributions for 2000
increased significantly due to the record high oil and gas prices received
during the year. There were no distributions during the year ended
December 31, 1999. During 1998, distributions were made totaling $32,000,
with $28,800 distributed to the limited partners and $3,200 to the general
partners. For the year ended December 31, 1998, distributions of $2.75 per
limited partner unit were made, based upon 10,484 limited partner units
outstanding.

Item 6. Selected Financial Data

The following selected financial data for the years ended December 31,
2000, 1999, 1998, 1997, and 1996 should be read in conjunction with the
financial statements included in Item 8:

Years ended December 31,
------------------------------------------------------
2000 1999 1998 1997 1996
---- ---- ---- ---- ----
Revenues $ 447,515 273,357 288,218 565,975 832,224

Net income (loss) 125,731 (26,816) (263,850) 40,793 173,666

Partners' share
of net income (loss):

General
partners 13,373 (1,782) (11,946) 10,479 23,067

Limited
partners 112,358 (25,034) (251,904) 30,314 150,599

Limited partners'
net income (loss)
per unit 10.72 (2.39) (24.03) 2.89 14.36

Limited partners'
cash distributions
per unit 7.04 - 2.75 14.83 13.13

Total assets $ 176,340 124,769 183,103 447,383 579,581



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

General
The Partnership was formed to acquire interests in producing oil and gas
properties, to produce and market crude oil and natural gas produced from
such properties and to distribute any net proceeds from operations to the
general and limited partners. Net revenues from producing oil and gas
properties are not reinvested in other revenue producing assets except to
the extent that producing facilities and wells are reworked or where
methods are, employed to improve or enable more efficient recovery of oil
and gas reserves. The economic life of the Partnership thus depends on the
period over which the Partnership's oil and gas reserves are economically
recoverable.

Increases or decreases in Partnership revenues and, therefore,
distributions to partners will depend primarily on changes in the prices
received for production, changes in volumes of production sold, lease
operating expenses, enhanced recovery projects, offset drilling activities
pursuant to farm-out arrangements and on the depletion of wells. Since
wells deplete over time, production can generally be expected to decline
from year to year.

Well operating costs and general and administrative costs usually decrease
with production declines; however, these costs may not decrease
proportionately. Net income available for distribution to the limited
partners is therefore expected to fluctuate in later years based on these
factors.

Based on current conditions, management anticipates performing a few
workovers during 2001 to enhance production. The partnership may have an
increase in production volumes for the year 2001, otherwise, the
partnership will most likely experience the historical production decline
of approximately 7% per year.



Results of Operations

A. General Comparison of the Years Ended December 31, 2000 and 1999

The following table provides certain information regarding performance
factors for the years ended December 31, 2000 and 1999:

Year Ended Percentage
December 31, Increase
2000 1999 (Decrease)
---- ---- ---------
Average price per barrel of oil $ 28.15 16.18 74%
Average price per mcf of gas $ 4.28 2.31 85%
Oil production in barrels 13,500 14,550 (7%)
Gas production in mcf 15,700 16,430 (4%)
Gross oil and gas revenue $ 447,179 273,357 64%
Net oil and gas revenue $ 216,159 65,632 229%
Partnership distributions $ 74,026 - 100%
Limited partner distributions $ 73,769 - 100%
Per unit distribution to limited partners $ 7.04 - 100%
Number of limited partner units 10,484 10,484

Revenues

The Partnership's oil and gas revenues increased to $447,179 from $273,357
for the years ended December 31, 2000 and 1999, respectively, an increase
of 64%. The principal factors affecting the comparison of the years ended
December 31, 2000 and 1999 are as follows:

1. The average price for a barrel of oil received by the Partnership
increased during the year ended December 31, 2000 as compared to the
year ended December 31, 1999 by 74%, or $11.97 per barrel, resulting in
an increase of approximately $161,600 in revenues. Oil sales
represented 85% of total oil and gas sales during the year ended
December 31, 2000 as compared to 86% during the year ended December 31,
1999.

The average price for an mcf of gas received by the Partnership
increased during the same period by 85%, or $1.97 per mcf, resulting in
an increase of approximately $30,900 in revenues.

The total increase in revenues due to the change in prices received
from oil and gas production is approximately $192,500. 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 1,050 barrels or 7% during the
year ended December 31, 2000 as compared to the year ended December 31,
1999, resulting in a decrease of approximately $17,000 in revenues.

Gas production decreased approximately 730 mcf or 4% during the same
period, resulting in a decrease of approximately $1,700 in revenues.

The total decrease in revenues due to the change in production is
approximately $18,700.

Costs and Expenses

Total costs and expenses increased to $321,784 from $300,173 for the years
ended December 31, 2000 and 1999, respectively, an increase of 7%. The
increase is the result of higher lease operating costs, partially offset by
a decrease in depletion expense and general and administrative expense.

1. Lease operating costs and production taxes were 11% higher, or
approximately $23,300 more during the year ended December 31, 2000 as
compared to the year ended December 31, 1999.

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 1%
or approximately $700 during the year ended December 31, 2000 as
compared to the year ended December 31, 1999.

3. Depletion expense decreased to $8,000 for the year ended December 31,
2000 from $9,000 for the same period in 1999. This represents a
decrease of 11%. 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.

The major factor to the decrease 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, 2001 as compared
to 2000. 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 $1,000 as of December 31, 1999.




Results of Operations

B. General Comparison of the Years Ended December 31, 1999 and 1998

The following table provides certain information regarding performance
factors for the years ended December 31, 1999 and 1998:

Year Ended Percentage
December 31, Increase
1999 1998 (Decrease)
---- ---- ---------
Average price per barrel of oil $ 16.18 11.65 39%
Average price per mcf of gas $ 2.31 1.83 26%
Oil production in barrels 14,550 21,500 (32%)
Gas production in mcf 16,430 20,500 (20%)
Gross oil and gas revenue $ 273,357 288,182 (5%)
Net oil and gas revenue $ 65,632 (23,689) 377%
Partnership distributions $ - 32,000 (100%)
Limited partner distributions $ - 28,800 (100%)
Per unit distribution to limited partners $ - 2.75 (100%)
Number of limited partner units 10,484 10,484

Revenues

The Partnership's oil and gas revenues decreased to $273,357 from $288,182
for the years ended December 31, 1999 and 1998, respectively, a decrease of
5%. The principal factors affecting the comparison of the years ended
December 31, 1999 and 1998 are as follows:

1. The average price for a barrel of oil received by the Partnership
increased during the year ended December 31, 1999 as compared to the
year ended December 31, 1998 by 39%, or $4.53 per barrel, resulting in
an increase of approximately $97,400 in revenues. Oil sales
represented 86% of total oil and gas sales during the year ended
December 31, 1999 as compared to 87% during the year ended December 31,
1998.

The average price for an mcf of gas received by the Partnership
increased during the same period by 26%, or $.48 per mcf, resulting in
an increase of approximately $9,800 in revenues.

The total increase in revenues due to the change in prices received
from oil and gas production is approximately $107,200. 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 6,950 barrels or 32% during the
year ended December 31, 1999 as compared to the year ended December 31,
1998, resulting in a decrease of approximately $112,500 in revenues.

Gas production decreased approximately 4,070 mcf or 20% during the same
period, resulting in a decrease of approximately $9,400 in revenues.

The total decrease in revenues due to the change in production is
approximately $121,900. The decrease in production is due primarily to
property sales and the shut-in of one gas well.

Costs and Expenses

Total costs and expenses decreased to $300,173 from $552,068 for the years
ended December 31, 1999 and 1998, respectively, a decrease of 46%. The
decrease is the result of lower general and administrative expense,
depletion expense, provision for impairment and lease operating costs.

2. Lease operating costs and production taxes were 33% lower, or
approximately $104,100 less during the year ended December 31, 1999 as
compared to the year ended December 31, 1998. The decrease in lease
operating costs are primarily due to property sales and the shut-in of one
gas well.

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
13% or approximately $12,400 during the year ended December 31, 1999 as
compared to the year ended December 31, 1998. The decrease of general
and administrative costs were due in part to additional accounting
costs incurred in 1998 in relation to the outsourcing of K-1 tax
package preparation and a change in auditors requiring opinions from
both the predecessors and successor auditors. Additionally, the
Managing General Partner in its effort to cut back on general and
administrative costs whenever and wherever possible was able to reduce
the cost of reserve reports and K-1 tax package preparation during
1999.

3. Depletion expense decreased to $9,000 for the year ended December 31,
1999 from $101,000 for the same period in 1998. This represents a
decrease of 91%. 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 decrease 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, 2000 as compared
to 1999. 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 $64,000 as of
December 31, 1998.

4. The Partnership reduced the net capitalized costs of oil and gas
properties during 1998 by $43,386. This provision for impairment had
the effect of reducing net income, but did not affect cash flow or
partner distributions. See Summary of Significant Accounting Policies
- Oil and Gas Properties.



C. Revenue and Distribution Comparison

Partnership income (loss) for the years ended December 31, 2000, 1999 and
1998 was $125,731, $(26,816) and $(263,850), respectively. Excluding the
effects of depreciation, depletion, amortization and provision for
impairment, net income (loss) would have been $133,731 in 2000, $(17,816)
in 1999 and $(119,464) in 1998. Correspondingly, Partnership distributions
for the years ended December 31, 2000, 1999 and 1998 were $74,026, 0 and
$32,000, respectively. These differences are indicative of the changes in
oil and gas prices, production and property sales.

The sources for the 2000 distributions of $74,026 were oil and gas
operations of approximately $83,100 and the change in oil and gas
properties of approximately $6,300, resulting in excess cash for
contingencies ore subsequent distributions. There were no distributions
for the year ending December 31, 1999. The sources for the 1998
distributions of $32,000 were oil and gas operations of approximately
$(47,400) and the change in oil and gas properties of approximately
$89,800, resulting in excess cash for contingencies or subsequent
distributions.

Total distributions during the year ended December 31, 2000 were $74,026 of
which $73,769 was distributed to the limited partners. The per unit
distribution to limited partners during the same period was $7.04. There
were no distributions during the year ending December 31, 1999. Total
distributions during the year ended December 31, 1998 were $32,000 of which
$28,800 was distributed to the limited partners and $3,200 to the general
partners. The per unit distribution to limited partners during the same
period was $2.75.

Since inception of the Partnership, cumulative monthly cash distributions
of $2,767,732 have been made to the partners. As of December 31, 2000,
$2,548,573 or $243.09 per limited partner unit, has been distributed to the
limited partners, representing a 49% return of the capital contributed.


Liquidity and Capital Resources

The primary source of cash is from operations, the receipt of income from
interests in oil and gas properties. The Partnership knows of no material
change, nor does it anticipate any such change.

Cash flows provided by (used in) operating activities were approximately
$83,100 in 2000 compared to $(57,300) in 1999 and approximately $(47,400)
in 1998. The primary source of the 2000 cash flow from operating
activities was for operations.

Cash flows provided by investing activities were approximately $6,300 in
2000 compared to $43,600 in 1999 and approximately $89,800 in 1998. The
principal source of the 2000 cash flow from investing activities was the
sale of oil and gas properties.

Cash flows provided by (used in) financing activities were approximately
$(74,200) in 2000 compared to $260 in 1999 and approximately $(32,200) in
1998.

As of December 31, 2000, the Partnership had approximately $74,200 in
working capital. The Managing General Partner knows of no unusual
contractual commitments and believes the revenues generated from operations
are adequate to meet the needs of the Partnership.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

The Partnership is not a party to any derivative or embedded derivative
instruments.




Item 8. Financial Statements and Supplementary Data

Index to Financial Statements

Page

Independent Auditors Report 20

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 Oil & Gas Income Fund X-A, L.P.
(A Delaware Limited Partnership):


We have audited the accompanying balance sheets of Southwest Oil & Gas
Income Fund X-A, L.P. (the "Partnership") as of December 31, 2000 and 1999,
and the related statements of operations, changes in partners' equity and
cash flows for each of the years in the three-year period ended December
31, 2000. 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 auditing standards generally accepted
in the United States of America. 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 Oil & Gas
Income Fund X-A, L.P. as of December 31, 2000 and 1999 and the results of
its operations and its cash flows for each of the years in the three-year
period ended December 31, 2000 in conformity with accounting principles
generally accepted in the United States of America.








KPMG LLP



Midland, Texas
March 21, 2001


Southwest Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)
Balance Sheets
December 31, 2000 and 1999


2000 1999
---- ----

Assets

Current assets:
Cash and cash equivalents $ 16,448 1,204
Receivable from Managing General Partner 58,391 7,752

- --------- ---------
Total current assets
74,839 8,956

- --------- ---------
Oil and gas properties - using the full-
cost method of accounting 3,796,887 3,803,199
Less accumulated depreciation,
depletion and amortization
3,695,386 3,687,386

- --------- ---------
Net oil and gas properties
101,501 115,813

- --------- ---------
$
176,340 124,769

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

Liabilities and Partners' Equity

Current liabilities
Distributions payable $ 677 811

- --------- ---------
Partners' equity:
General partners (15,461) (28,577)
Limited partners 191,124 152,535

- --------- ---------
Total partners' equity
175,663 123,958

- --------- ---------
$
176,340 124,769

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


















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


Southwest Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)
Statements of Operations
Years ended December 31, 2000, 1999 and 1998


2000 1999 1998
---- ---- ----
Revenues

Oil and gas income $ 447,179 273,357 288,182
Interest 336 - 33
Miscellaneous income - - 3
-------
- ------- ---------
447,515
273,357 288,218
-------
- ------- ---------

Expenses

Production 231,020 207,725 311,871
General and administrative 82,764 83,448 95,811
Depreciation, depletion and amortization 8,000 9,000 101,000
Provision for impairment of oil and gas
properties - - 43,386
-------
- ------- ---------
321,784
300,173 552,068
-------
- ------- ---------
Net income (loss) $ 125,731 (26,816)(263,850)
=======
======= =========

Net income (loss) allocated to:

Managing General Partner $ 12,036 (1,604) (10,751)
=======
======= =========
General Partner $ 1,337 (178) (1,195)
=======
======= =========
Limited partners $ 112,358 (25,034)(251,904)
=======
======= =========
Per limited partner unit $ 10.72 (2.39) (24.03)
=======
======= =========





















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


Southwest Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)
Statement of Changes in Partners' Equity
Years ended December 31, 2000, 1999 and 1998


General Limited
Partners Partners Total
-------- -------- -----

Balance at December 31, 1997 $ (11,649) 458,273 446,624

Net loss (11,946) (251,904)(263,850)

Distributions (3,200) (28,800) (32,000)
-------
- --------- ---------
Balance at December 31, 1998 (26,795) 177,569 150,774

Net loss (1,782) (25,034) (26,816)

Distributions - - -
-------
- --------- ---------
Balance at December 31, 1999 (28,577) 152,535 123,958

Net income 13,373 112,358 125,731

Distributions (257) (73,769) (74,026)
-------
- --------- ---------
Balance at December 31, 2000 $ (15,461) 191,124 175,663
=======
========= =========































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


Southwest Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)
Statements of Cash Flows
Years ended December 31, 2000, 1999 and 1998


2000 1999 1998
---- ---- ----

Cash flows from operating activities:

Cash received from oil and gas sales $ 415,489 248,321 337,610
Cash paid to Managing General Partner
for administrative fees and general
and administrative overhead
(332,733) (305,667)(385,018)
Interest received 336 - 33
--------
- -------- --------
Net cash provided by (used in) operating
activities 83,092 (57,346)
(47,375)
--------
- -------- --------
Cash flows from investing activities:

Additions to oil and gas properties - (1,252) -
Sale of oil and gas properties 6,312 44,870 89,847
--------
- -------- --------
Net cash provided by investing activities 6,312 43,618
89,847
--------
- -------- --------
Cash flows (used in) provided by financing
activities:

Distributions to partners (74,160) 260 (32,208)
--------
- -------- --------
Net increase (decrease) in cash and
cash equivalents 15,244 (13,468) 10,264

Beginning of year 1,204 14,672 4,408
--------
- -------- --------
End of year $ 16,448 1,204 14,672
========
======== ========


(continued)




















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


Southwest Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)
Statements of Cash Flows, continued
Years ended December 31, 2000, 1999 and 1998


2000 1999 1998
---- ---- ----

Reconciliation of net income (loss) to
net cash provided by (used in)
operating activities:

Net income (loss) $ 125,731 (26,816)(263,850)

Adjustments to reconcile net income
(loss) to net cash provided by
(used in) operating activities:

Depreciation, depletion and amortization 8,000 9,000
101,000
Provision of impairment of oil and gas
Properties - -
43,386
(Increase) decrease in receivables (31,690) (25,036) 49,425
(Decrease) increase in payables (18,949) (14,494) 22,664
-------
- ------- -------
Net cash provided by (used in) operating
activities $ 83,092 (57,346) (47,375)
=======
======= =======

































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


Southwest Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


1. Organization
Southwest Oil and Gas Income Fund X-A, L.P. was organized under the
laws of the state of Delaware on January 29, 1990, for the purpose of
acquiring producing oil and gas properties 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 the Managing General Partner and H. H. Wommack, III, as
the individual general partner. Revenues, costs, and expenses are
allocated as follows:

Limited General
Partners Partners
-------- --------

Interest income on capital contributions 100% -
Oil and gas sales 90% 10%
All other revenues 90% 10%
Organization and offering costs (1) 100% -
Syndication costs 100% -
Amortization of organization costs 100% -
Property acquisition costs 100% -
Gain/loss on property disposition 90% 10%
Operating and administrative costs (2) 90% 10%
Depreciation, depletion and amortization
of oil and as properties 100% -
All other costs 90% 10%

(1) All organization costs in excess of 3% 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 3% 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 Oil & Gas Income Fund X-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, 2000 and 1999 the net
capitalized costs did not exceed the estimated present value of oil
and gas reserves. As December 31, 1998, the net capitalized cost
exceeded the estimated present value of oil and gas reserves, thus an
adjustment of $43,386 was made to the financial statement.

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.

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


Southwest Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements


2. Summary of Significant Accounting Policies - continued

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, 2000, 1999 and
1998, 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, 2000 and 1999 is $67,656 and $74,231, respectively, more 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.

Number of Limited Partner Units
As of December 31, 2000, 1999 and 1998 there were 10,484 limited
partner units outstanding held by 564, 564 and 570 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.

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 Oil & Gas Income Fund X-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, 2000, 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 Oil & Gas Income Fund X-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 $45,100, $56,700 and $70,200 for the years
ended December 31, 2000, 1999 and 1998, 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
$12,800, $3,200 and $1,900 for the years ended December 31, 2000, 1999
and 1998, 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
$78,000 during 2000, 1999 and 1998, as an administrative fee, for
indirect general and administrative overhead expenses.

Receivables from Southwest Royalties, Inc., the Managing General
Partner, of approximately $58,400 and $7,800 are from oil and gas
production, net of lease operating costs and production taxes, as of
December 31, 2000 and 1999, 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 approximately $100 and $200 for the years ended
December 31, 2000 and 1999. There were no legal services provided for
the years ended December 31, 1998.

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. Four
purchasers accounted for 85% of the Partnership's total oil and gas
production during 2000: Plains Marketing LP for 27%, Eaglewing
Trading Inc. for 23%, Navajo Refining Company for 22% and Phillips 66
for 13%. Three purchasers accounted for 73% of the Partnership's
total oil and gas production during 1999: Scurlock Permian
Corporation for 27%, Navajo Refining Company for 26% and Eaglewing
Trading Inc. for 20%. Four purchasers accounted for 78% of the
Partnership's total oil and gas production during 1998: Scurlock
Permian Corporation 33%, Navajo Refining Company 21%, Eaglewing
Trading Inc. 13% and Mobil Corporation 11%. All purchasers of the
Partnership's oil and gas production are unrelated third parties. In
the event any of these purchasers were to discontinue purchasing the
Partnership's production, the Managing General Partner believes that a
substitute purchaser or purchasers could be located without delay. No
other purchaser accounted for an amount equal to or greater than 10%
of the Partnership's sales of oil and gas production.



Southwest Oil & Gas Income Fund X-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, 1998 181,000 233,000

Sales of reserves in place (7,000) (8,000)
Revisions of previous estimates (114,000) (57,000)
Production (22,000) (21,000)
------- -------
December 31, 1998 38,000 147,000

Revisions of previous estimates 120,000 32,000
Production (15,000) (16,000)
------- -------
December 31, 1999 143,000 163,000

Revisions of previous estimates 21,000 20,000
Production (14,000) (16,000)
------- -------
December 31, 2000 150,000 167,000
======= =======

Proved developed reserves -

December 31, 1998 37,000 138,000
======= =======
December 31, 1999 142,000 155,000
======= =======
December 31, 2000 138,000 146,000
======= =======

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

*Ryder Scott Petroleum Engineers prepared the reserve and present
value data for the Partnership's existing properties as of January 1,
2001. 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, 2000 of $26.80
was used as the beginning basis for the oil price. Oil price
adjustments from $26.80 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
$24.82 per barrel in the preparation of the reserve report as of
January 1, 2001.


Southwest Oil & Gas Income Fund X-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, 2000 of $9.78 was used as the beginning
basis. Gas price adjustments from $9.78 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 $9.62 per Mcf in the
preparation of the reserve report as of January 1, 2001.

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, proved developed non-producing and proved undeveloped. All
of the proved reserves are included in the engineering reports which
evaluate the Partnership's present reserves.

Because the Partnership does not engage in drilling activities, the
development of proved undeveloped reserves in conducted pursuant to
farm-out arrangements with the Managing General Partner or unrelated
third parties. Generally, the Partnership retains a carried interest
such as an overriding royalty interest under the terms of a farm-out
or receives cash.


Southwest Oil & Gas Income Fund X-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, 2000, 1999 and 1998 is
presented below:

2000 1999 1998
---- ---- -----

Future cash inflows $ 5,321,000 3,629,000 604,000
Production and development costs 2,497,000 2,097,000 359,000
--------- --------- ---------
Future net cash flows 2,824,000 1,532,000 245,000
10% annual discount for estimated
timing of cash flows 1,262,000 609,000 77,000
--------- --------- ---------
Standardized measure of discounted
future net cash flows $ 1,562,000 923,000 168,000
========= ========= =========

The principal sources of change in the standardized measure of
discounted future net cash flows for the years ended December 31,
2000, 1999 and 1998 are as follows:

2000 1999 1998
---- ---- ----
Sales of oil and gas produced,
net of production costs $ (216,000) (66,000) 23,000
Changes in prices and production costs 624,000 172,000
(523,000)
Changes of production rates
(timing) and others (74,000) (48,000) 79,000
Sales of minerals in place - - (32,000)
Revisions of previous
quantities estimates 213,000 680,000 (337,000)
Accretion of discount 92,000 17,000 87,000
Discounted future net
cash flows -
Beginning of year 923,000 168,000 871,000
--------- --------- ---------
End of year $ 1,562,000 923,000 168,000
========= ========= =========

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 Oil & Gas Income Fund X-A, L.P.
(a Delaware limited partnership)

Notes to Financial Statements

7. Selected Quarterly Financial Results - (unaudited)

Quarter
----------------------------------------------
First Second Third Fourth
------ ------- ------ ------
2000:
Total revenues $ 103,354 100,992 122,358 120,811
Total expenses 76,489 75,981 86,078 83,236
Net income 26,865 25,011 36,280 37,575
Net income per limited
partners unit 2.28 2.14 3.09 3.22

1999:
Total revenues $ 49,017 64,687 77,066 82,587
Total expenses 78,142 70,396 82,798 68,837
Net income (loss) (29,125) (5,709) (5,732) 13,750
Net income (loss) per limited
partners unit (2.54) (.51) (.49) 1.15

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

None


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 45 Chairman of the Board,
President,
Chief Executive Officer, Treasurer
and Director

H. Allen Corey 44 Secretary and Director

Bill E. Coggin 46 Vice President and Chief
Financial Officer

J. Steven Person 42 Vice President, Marketing

Paul L. Morris 59 Director

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.

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.B.A. from Houston Baptist University in 1987.

Paul L. Morris has served as a Director of Southwest Royalties Holdings,
Inc. since August 1998 and Southwest Royalties, Inc. since September 1998.
Mr. Morris is President and CEO of Wagner & Brown, Ltd., one of the largest
independently owned oil and gas companies in the United States. Prior to
his position with Wagner & Brown, Mr. Morris served as President of Banner
Energy and in various managerial positions with the Columbia Gas System,
Inc.



Key Employees

Jon P. Tate, Vice President, Land and Assistant Secretary, age 43, 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 American Association of Petroleum Landmen. Mr.
Tate received his B.B.S. degree from Hardin-Simmons University.

R. Douglas Keathley, Vice President, Operations, age 45, 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.

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 Partners
received $78,000 during 2000, 1999 and 1998 as an annual administrative
fee.

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 a nine percent interest as a general
partner. Through prior purchases, the Managing General Partner also owns
156.0 limited partner units, or a 1.5% limited partner interest. The
Managing General Partner total percentage interest ownership in the
Partnership is 10.5%.

No officer or director of the Managing General Partner owns Units in the
Partnership. H. H. Wommack, III, as the individual general partner of the
Partnership, owns a one percent interest as a general partner. The
officers and directors of the Managing General Partner are considered
beneficial owners of the limited partner units acquired by the Managing
General Partner by virtue of their status as such. A list of beneficial
owners of limited partner units, acquired by the Managing General Partner,
is as follows:


Amount and
Nature of Percent
Name and Address of Beneficial of
Title of Class Beneficial Owner Ownership Class
- ------------------- --------------------------- --------------- -------
Limited Partnership Southwest Royalties, Inc. Directly Owns 1.5%
Interest Managing General Partner 156.0 Units
407 N. Big Spring Street
Midland, TX 79701

Limited Partnership H. H. Wommack, III Indirectly Owns 1.5%
Interest Chairman of the Board, 156.0 Units
President, CEO, Treasurer
and Director of Southwest
Royalties, Inc., the
Managing General Partner
407 N. Big Spring Street
Midland, TX 79701

Limited Partnership H. Allen Corey Indirectly Owns 1.5%
Interest Secretary and Director of 156.0 Units
Southwest Royalties, Inc.,
the Managing General
Partner
633 Chestnut Street
Chattanooga, TN 37450-1800

Limited Partnership Bill E. Coggin Indirectly Owns 1.5%
Interest Vice President and CFO of 156.0 Units
Southwest Royalties, Inc.,
the Managing General
Partner
407 N. Big Spring Street
Midland, TX 79701

Limited Partnership J. Steven Person Indirectly Owns 1.5%
Interest Vice President, Marketing 156.0 Units
of Southwest Royalties, Inc.,
the Managing General
Partner
407 N. Big Spring Street
Midland, TX 79701


Limited Partnership Paul L. Morris Indirectly Owns 1.5%
Interest Director of Southwest 156.0 Units
Royalties, Inc., the
Managing General Partner
407 N. Big Spring Street
Midland, TX 79701


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 2000, the Managing General Partner received $78,000 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 $45,100 for administrative overhead
attributable to operating such properties during 2000.

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 $12,800 for the year
ended December 31, 2000.

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 --

Independent Auditors Report
Balance Sheets
Statements of Operations
Statement of Changes in Partners' Equity
Statements 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 Oil & Gas Income Fund X-
A, L.P., dated January 29, 1990. (Incorporated
by reference from Partnership's Form 10-K for the
fiscal year ended December 31, 1990.)

(b) Agreement of Limited
Partnership of Southwest Oil & Gas Income Fund X-
A, L.P. dated January 29, 1990. (Incorporated by
reference from Partnership's Form 10-K for the
fiscal year ended December 31, 1990.)

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, 2000.


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 Oil & Gas Income Fund X-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 30, 2001


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 30, 2001


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


Date: March 30, 2001