Ridgewood Energy W Fund LLC - FORM 10-K/A - EX-99 - REPORT OF RYDER SCOTT COMPANY, L.P.

Attached files

file	filename
10-K/A - FOR THE FISCAL YEAR ENDED DECEMBER 31, 2009 AMENDMENT NO. 1 - Ridgewood Energy W Fund LLC	f82210110ka1.htm
EX-32 - Ridgewood Energy W Fund LLC	ex32.htm
EX-31.1 - Ridgewood Energy W Fund LLC	ex31_1.htm
EX-31.2 - Ridgewood Energy W Fund LLC	ex31_2.htm

Exhibit 99

RIDGEWOOD ENERGY CORPORATION

Estimated

Future Reserves and Income

Attributable to Certain

Leasehold and Royalty Interests

SEC Parameters

(Producing and Non-Producing Properties)

As of

December 31, 2009

\s\ Stephen E. Gardner		\s\ John E. Hamlin
Stephen E. Gardner, P.E.		John E. Hamlin, P.E.
TBPE License No. 100578		TBPE License No. 65319
Senior Petroleum Engineer		Managing Senior Vice President

RYDER SCOTT COMPANY, L.P.

TBPE Firm Registration No. F-1580

[SEAL]

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS


TBPE REGISTERED ENGINEERING FIRM F-1580		FAX (713) 651-0849
1100 LOUISIANA SUITE 3800	HOUSTON, TEXAS 77002-5235	TELEPHONE (713) 651-9191

February 9, 2010

Ridgewood Energy Corporation

14 Philips Parkway

Montvale, NJ 07645-1811

Associates:

At your request, Ryder Scott Company (Ryder Scott) has prepared an estimate of the proved, probable and possible reserves, future production, and income attributable to certain leasehold and royalty interests of Ridgewood Energy Corporation (Ridgewood) as of December 31, 2009. Our report entitled “Ridgewood Energy Partnerships” includes the consolidated interests of all the Ridgewood partnerships. The subject properties are located in the federal waters offshore Louisiana and Texas and in the state waters offshore Louisiana. At Ridgewood’s request we have summarized the producing and non-producing properties where the non-producing properties comprise those fields that have not yet come on production. The reserves and income data were estimated based on the definitions and disclosure guidelines of the United States Securities and Exchange Commission (SEC) contained in Title 17, Code of Federal Regulations, Modernization of Oil and Gas Reporting, Final Rule released January 14, 2009 in the Federal Register (SEC regulations). Our third party study, completed on January 18, 2010 and presented herein, was prepared for public disclosure by Ridgewood in filings made with the SEC in accordance with the disclosure requirements set forth in the SEC regulations. The properties reviewed by Ryder Scott represent 100 percent of the total net proved liquid hydrocarbon reserves and 100 percent of the total net proved gas reserves of Ridgewood.

The estimated reserves and future net income amounts presented in this report, as of December 31, 2009 are related to hydrocarbon prices. The hydrocarbon prices used in the preparation of this report are based on the average prices during the 12-month period prior to the ending date of the period covered in this report, determined as unweighted arithmetic averages of the prices in effect on the first-day-of-the-month for each month within such period, unless prices were defined by contractual arrangements, as required by the SEC regulations. Actual future prices may vary significantly from the prices required by SEC regulations; therefore, volumes of reserves actually recovered and the amounts of income actually received may differ significantly from the estimated quantities presented in this report. The results of this study are summarized below.

	1200, 530 8TH AVENUE, S.W.	CALGARY, ALBERTA T2P 3S8	TEL (403) 262-2799	FAX (403) 262-2790
	621 17TH STREET, SUITE 1550	DENVER, COLORADO 80293-1501	TEL (303) 623-9147	FAX (303) 623-4258

Ridgewood Energy Corporation

February 9, 2010

Page 2

SEC PARAMETERS

(Producing and Non-Producing Properties)

Estimated Net Reserves and Income Data

Certain Leasehold and Royalty Interests of

Ridgewood Energy Partnerships

As of December 31, 2009

I. PRODUCING PROPERTIES
	Proved
	Developed						Total
	Producing		Non-Producing		Undeveloped		Proved
Net Remaining Reserves
Oil/Condensate – Barrels		269,150		637,638		18,212		925,000
Plant Products – Barrels		42,242		7,800		0		50,042
Gas – MMCF		11,980		22,323		11,507		45,810

Income Data
Future Gross Revenue	$	66,956,412	$	128,066,557	$	45,983,591	$	241,006,560
Deductions		14,713,892		32,109,523		18,123,693		64,947,108
Future Net Income (FNI)	$	52,242,520	$	95,957,034	$	27,859,898	$	176,059,452

Discounted FNI @ 10%	$	49,409,040	$	75,313,950	$	14,679,515	$	139,402,505

	Probable
	Developed						Total
	Producing		Non-Producing		Undeveloped		Probable
Net Remaining Reserves
Oil/Condensate – Barrels		165,701		60,494		1,948		228,143
Plant Products – Barrels		45,598		6,615		0		55,213
Gas – MMCF		5,671		2,473		1,929		10,073

Income Data
Future Gross Revenue	$	34,769,424	$	14,328,106	$	7,557,375	$	56,654,905
Deductions		3,657,546		1,289,601		551,033		5,498,180
Future Net Income (FNI)	$	31,111,878	$	13,038,505	$	7,006,342	$	51,156,725

Discounted FNI @ 10%	$	24,004,959	$	7,320,453	$	3,320,792	$	34,646,204

	Possible
	Developed						Total
	Producing		Non-Producing		Undeveloped		Possible
Net Remaining Reserves
Oil/Condensate – Barrels		44,071		76,455		4,242		124,768
Plant Products – Barrels		23,216		0		0		23,216
Gas – MMCF		2,563		1,576		2,387		6,526

Income Data
Future Gross Revenue	$	13,895,432	$	10,919,607	$	9,622,182	$	34,437,221
Deductions		1,769,638		1,630,129		636,073		4,035,840
Future Net Income (FNI)	$	12,125,794	$	9,289,478	$	8,986,109	$	30,401,381

Discounted FNI @ 10%	$	7,194,315	$	7,262,901	$	4,658,085	$	19,115,301

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 3

II. NON-PRODUCING PROPERTIES
	Total		Total		Total
	Proved		Probable		Possible
	Undeveloped		Undeveloped		Undeveloped
Net Remaining Reserves
Oil/Condensate – Barrels		1,179,467		1,657,075		668,499
Gas – MMCF		23,779		18,970		20,384

Income Data
Future Gross Revenue	$	156,725,403	$	168,854,742	$	112,800,493
Deductions		82,940,292		23,852,008		34,463,028
Future Net Income (FNI)	$	73,785,111	$	145,002,734	$	78,337,465

Discounted FNI @ 10%	$	48,107,475	$	91,471,113	$	34,576,644

III. GRAND SUMMARIES
	Proved
	Developed						Total
	Producing		Non-Producing		Undeveloped		Proved
Net Remaining Reserves
Oil/Condensate – Barrels		269,150		637,638		1,197,679		2,104,467
Plant Products – Barrels		42,242		7,800		0		50,042
Gas – MMCF		11,980		22,323		35,286		69,589

Income Data
Future Gross Revenue	$	66,956,412	$	128,066,557	$	202,708,994	$	397,731,963
Deductions		14,713,892		32,109,523		101,063,985		147,887,400
Future Net Income (FNI)	$	52,242,520	$	95,957,034	$	101,645,009	$	249,844,563

Discounted FNI @ 10%	$	49,409,040	$	75,313,950	$	62,786,990	$	187,509,980

	Probable
	Developed						Total
	Producing		Non-Producing		Undeveloped		Probable
Net Remaining Reserves
Oil/Condensate – Barrels		165,701		60,494		1,659,023		1,885,218
Plant Products – Barrels		48,598		6,615		0		55,213
Gas – MMCF		5,671		2,473		20,899		29,043

Income Data
Future Gross Revenue	$	34,769,424	$	14,328,106	$	176,412,117	$	225,509,647
Deductions		3,657,546		1,289,601		24,403,041		29,350,188
Future Net Income (FNI)	$	31,111,878	$	13,038,505	$	152,009,076	$	196,159,459

Discounted FNI @ 10%	$	24,004,959	$	7,320,453	$	94,791,905	$	126,117,317

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 4


	Possible
	Developed						Total
	Producing		Non-Producing		Undeveloped		Possible
Net Remaining Reserves
Oil/Condensate – Barrels		44,071		76,455		672,741		793,267
Plant Products – Barrels		23,216		0		0		23,216
Gas – MMCF		2,563		1,576		22,771		26,910

Income Data
Future Gross Revenue	$	13,895,432	$	10,919,607	$	122,422,675	$	147,237,714
Deductions		1,769,638		1,630,129		35,099,101		38,498,868
Future Net Income (FNI)	$	12,125,794	$	9,289,478	$	87,323,574	$	108,738,846

Discounted FNI @ 10%	$	7,194,315	$	7,262,901	$	39,234,729	$	53,691,945

Liquid hydrocarbons are expressed in standard 42 gallon barrels. All gas volumes are reported on an “as sold” basis expressed in millions of cubic feet (MMCF) at the official temperature and pressure bases of the areas in which the gas reserves are located.

The estimates of the reserves, future production, and income attributable to properties in this report were prepared using the economic software package PHDWin Petroleum Economic Evaluation Software, a copyrighted program of TRC Consultants L.C. The program was used solely at the request of Ridgewood. Ryder Scott has found this program to be generally acceptable, but notes that certain summaries and calculations may vary due to rounding and may not exactly match the sum of the properties being summarized. Furthermore, one line economic summaries may vary slightly from the more detailed cash flow projections of the same properties, also due to rounding. The rounding differences are not material.

The future gross revenue is after the deduction of production taxes. The deductions incorporate the normal direct costs of operating the wells, ad valorem taxes, recompletion costs, development costs, and certain abandonment costs net of salvage. Certain gas, oil and condensate processing and handling fees, including compression fees where applicable, are included as “other” costs. The future net income is before the deduction of state and federal income taxes and general administrative overhead, and has not been adjusted for outstanding loans that may exist nor does it include any adjustment for cash on hand or undistributed income.

At the grand summary level, gas reserves account for approximately 69 percent of the total future gross revenue from proved reserves and liquid hydrocarbon reserves account for the remaining 31 percent of total future gross revenue from proved reserves. Similarly, gas reserves account for approximately 51 percent of the total future gross revenue from probable reserves and liquid hydrocarbon reserves account for the remaining 49 percent of total future gross revenue from probable reserves. Gas reserves account for approximately 69 percent of the total future gross revenue from possible reserves and liquid hydrocarbon reserves account for the remaining 31 percent of total future gross revenue from possible reserves.

The discounted future net income shown above was calculated using a discount rate of 10 percent per annum compounded monthly. Future net income was discounted at four other discount rates which were also compounded monthly. These results are shown in summary form as follows.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 5

I. PRODUCING PROPERTIES
	Discounted Future Net Income
	As of December 31, 2009
Discount Rate	Total	Total	Total
Percent	Proved	Probable	Possible

8	$145,613,650	$37,196,987	$20,810,863
12	$133,651,548	$32,370,094	$17,621,600
15	$125,797,235	$29,391,475	$15,697,773
20	$114,468,155	$25,350,898	$13,152,415
30	$ 96,848,976	$19,634,904	$ 9,702,984

II. NON-PRODUCING PROPERTIES
	Discounted Future Net Income
	As of December 31, 2009
Discount Rate	Total	Total	Total
Percent	Proved	Probable	Possible

8	$52,279,983	$99,191,299	$39,851,920
12	$44,312,298	$84,765,804	$30,274,892
15	$39,238,366	$76,257,126	$25,173,974
20	$22,152,687	$65,196,134	$19,076,919
30	$21,730,142	$50,415,829	$11,591,792

III. GRAND SUMMARIES
	Discounted Future Net Income
	As of December 31, 2009
Discount Rate	Total	Total	Total
Percent	Proved	Probable	Possible

8	$197,893,633	$136,388,286	$60,662,783
12	$177,963,846	$117,135,898	$47,896,492
15	$165,035,601	$105,648,601	$40,871,747
20	$146,620,842	$ 90,547,032	$32,229,334
30	$118,579,118	$ 70,050,733	$21,294,776

The results shown above are presented for your information and should not be construed as our estimate of fair market value.

Reserves Included in This Report

The proved, probable and possible reserves included herein conform to the definitions as set forth in the Securities and Exchange Commission’s Regulations Part 210.4-10(a). An abridged version of the SEC reserves definitions from 210.4-10(a) entitled “Petroleum Reserves Definitions” is included as an attachment to this report.

The various proved, probable and possible reserve status categories are defined under the attachment entitled “Petroleum Reserves Definitions” in this report. The proved developed non-producing reserves included herein are associated with the producing properties and consist of the shut-in and behind pipe categories. The developed probable and possible non-producing preserves included herein are also associated with the producing properties and consist of the behind pipe category.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 6

No attempt was made to quantify or otherwise account for any accumulated gas production imbalances that may exist. The proved, probable and possible gas volumes included herein do not attribute gas consumed in operations as reserves.

Reserves are those estimated remaining quantities of petroleum which are anticipated to be economically producible, as of a given date, from known accumulations under defined conditions. All reserve estimates involve an assessment of the uncertainty relating the likelihood that the actual remaining quantities recovered will be greater or less than the estimated quantities determined as of the date the estimate is made. The uncertainty depends chiefly on the amount of reliable geologic and engineering data available at the time of the estimate and the interpretation of these data. The relative degree of uncertainty may be conveyed by placing reserves into one of two principal classifications, either proved or unproved. Unproved reserves are less certain to be recovered than proved reserves and may be further sub-classified as probable and possible reserves to denote progressively increasing uncertainty in their recoverability. At Ridgewood’s request, this report addresses the proved, probable and possible reserves attributable to the properties evaluated herein.

Proved oil and gas reserves are those quantities of oil and gas which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible from a given date forward. Probable reserves are those additional reserves that are less certain to be recovered than proved reserves but which together with proved reserves are as likely as not to be recovered. Possible reserves are those additional reserves which are less certain to be recovered than probable reserves and thus the probability of achieving or exceeding the proved plus probable plus possible reserves is low. The proved, probable and possible reserves included herein were estimated using deterministic methods. If deterministic methods are used, the SEC has defined reasonable certainty for proved reserves as a “high degree of confidence that the quantities will be recovered.”

Proved reserve estimates will generally be revised only as additional geologic or engineering data become available or as economic conditions change. For proved reserves, the SEC states that “as changes due to increased availability of geoscience (geological, geophysical, and geochemical), engineering, and economic data are made to the estimated ultimate recovery (EUR) with time, reasonably certain EUR is much more likely to increase or remain constant than to decrease.” Moreover, estimates of proved reserves may be revised as a result of future operations, effects of regulation by governmental agencies or geopolitical or economic risks. Therefore, the proved reserves included in this report are estimates only and should not be construed as being exact quantities, and if recovered, the revenues therefrom, and the actual costs related thereto, could be more or less than the estimated amounts.

Ridgewood’s operations may be subject to various levels of governmental controls and regulations. These controls and regulations may include, but may not be limited to, matters relating to land tenure and leasing, the legal rights to produce hydrocarbons including drilling and production practices, environmental protection, marketing and pricing policies, royalties, various taxes and levies including income tax and are subject to change from time to time. Such changes in governmental regulations and policies may cause volumes of proved, probable and possible reserves actually recovered, and amounts of proved, probable and possible income actually received, to differ significantly from the estimated quantities.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 7

The estimates of proved, probable and possible reserves presented herein were based upon a detailed study of the properties in which Ridgewood owns an interest; however, we have not made any field examination of the properties. No consideration was given in this report to potential environmental liabilities that may exist nor were any costs included for potential liabilities to restore and clean up damages, if any, caused by past operating practices.

Estimates of Reserves

The estimation of reserves involves two distinct determinations. The first determination results in the estimation of the quantities of recoverable oil and gas and the second determination results in the estimation of the uncertainty associated with those estimated quantities in accordance with the definitions set forth by the Securities and Exchange Commission’s Regulations Part 210.4-10(a). The process of estimating the quantities of recoverable oil and gas reserves relies on the use of certain generally accepted analytical procedures. These analytical procedures fall into three broad categories or methods: (1) performance-based methods, (2) volumetric-based methods and (3) analogy. These methods may be used singularly or in combination by the reserve evaluator in the process of estimating the quantities of reserves. The reserve evaluator must select the method or combination of methods which in their professional judgment is most appropriate given the nature and amount of reliable geoscience and engineering data available at the time of the estimate, the established or anticipated performance characteristics of the reservoir being evaluated and the stage of development or producing maturity of the property.

In many cases, the analysis of the available geoscience and engineering data and the subsequent interpretation of this data may indicate a range of possible outcomes in an estimate, irrespective of the method selected by the evaluator. When a range in the quantity of reserves is identified, the evaluator must determine the uncertainty associated with the incremental quantities of the reserves. If the reserve quantities are estimated using the deterministic incremental approach, the uncertainty for each discrete incremental quantity of the reserves is addressed by the reserve category assigned by the evaluator. Therefore, it is the categorization of reserve quantities as proved, probable and/or possible that addresses the inherent uncertainty in the estimated quantities reported. For proved reserves, uncertainty is defined by the SEC as reasonable certainty wherein the “quantities actually recovered are much more likely than not to be achieved.” The SEC states that “probable reserves are those additional reserves that are less certain to be recovered than proved reserves but which, together with proved reserves, are as likely as not to be recovered.” The SEC states that “possible reserves are those additional reserves that are less certain to be recovered than probable reserves and the total quantities ultimately recovered from a project have a low probability of exceeding proved plus probable plus possible reserves.” All quantities of reserves within the same reserve category must meet the SEC definitions as noted above.

Estimates of reserves quantities and their associated reserve categories may be revised in the future as additional geoscience or engineering data become available. Furthermore, estimates of reserves quantities and their associated reserve categories may also be revised due to other factors such as changes in economic conditions, results of future operations, effects of regulation by governmental agencies or geopolitical or economic risks as previously noted herein.

The proved reserves for the properties included herein were estimated by performance methods, the volumetric method or a combination of methods. Approximately 24 percent of the proved producing reserves attributable to producing wells and/or reservoirs were estimated by performance methods. These performance methods include, but may not be limited to, decline curve analysis and/or material balance which utilized extrapolations of historical production and pressure data available through November, 2009 in those cases where such data were considered to be definitive. The data utilized in this analysis were supplied to Ryder Scott by Ridgewood or obtained from public data sources and were considered sufficient for the purpose thereof. Approximately 73 percent of the proved producing reserves were estimated by the volumetric method and 3 percent of the proved producing reserves were estimated by a combination of volumetric and performance methods. These methods were used where there were inadequate historical performance data to establish a definitive trend and where the use of production performance data as a basis for the reserve estimates was considered to be inappropriate.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 8

Approximately 100 percent of the proved non-producing reserves included herein were estimated by the volumetric method. Approximately 83 percent of the proved undeveloped reserves included herein were estimated by the volumetric method. Approximately 17 percent of the proved undeveloped reserves were estimated by the performance material balance method.

The probable and possible reserves for the properties included herein were estimated by performance methods, the volumetric method or a combination of these methods. Approximately 15 percent of the probable producing reserves attributable to producing wells and/or reserves were estimated by the performance material balance method. Approximately 85 percent of the probable producing reserves, 100 percent of the probable non-producing reserves, and 100 percent of the probable undeveloped reserves were estimated by the volumetric method. One hundred percent of the possible reserves were estimated by the volumetric method. The volumetric analysis utilized pertinent well and seismic data supplied to Ryder Scott by Ridgewood or which we have obtained from public data sources that were available through November, 2009. The data utilized from the analogues as well as well and seismic data incorporated into our volumetric analysis were considered sufficient for the purpose thereof.

To estimate economically recoverable proved, probable and possible oil and gas reserves and related future net cash flows, we consider many factors and assumptions including, but not limited to, the use of reservoir parameters derived from geological, geophysical and engineering data which cannot be measured directly, economic criteria based on current costs and SEC pricing requirements, and forecasts of future production rates. Under the SEC regulations 210.4-10(a)(22)(v) and (26), proved reserves must be anticipated to be economically producible from a given date forward based on existing economic conditions including the prices and costs at which economic producibility from a reservoir is to be determined. While it may reasonably be anticipated that the future prices received for the sale of production and the operating costs and other costs relating to such production may increase or decrease from those under existing economic conditions, such changes were, in accordance with rules adopted by the SEC, omitted from consideration in making this evaluation.

Ridgewood has informed us that they have furnished us all of the material accounts, records, geological and engineering data, and reports and other data required for this investigation. In preparing our forecast of future proved production and income, we have relied upon data furnished by Ridgewood with respect to property interests owned, production and well tests from examined wells, normal direct costs of operating the wells or leases, other costs such as transportation and/or processing fees, ad valorem and production taxes, recompletion and development costs, abandonment costs after salvage, product prices based on the SEC regulations, adjustments or differentials to product prices, geological structural and isochore maps, well logs, core analyses, and pressure measurements. Ryder Scott reviewed such factual data for its reasonableness; however, we have not conducted an independent verification of the data supplied by Ridgewood. We consider the factual data used in this report appropriate and sufficient for the purpose of preparing the estimates of reserves and future net revenues herein.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 9

In summary, we consider the assumptions, data, methods and analytical procedures used in this report appropriate for the purpose hereof, and we have used all such methods and procedures that we consider necessary and appropriate to prepare the estimates of reserves herein. The proved, probable and possible reserves included herein were determined in conformance with the United States Securities and Exchange Commission (SEC) Modernization of Oil and Gas Reporting; Final Rule, including all references to Regulation S-X and Regulation S-K, referred to herein collectively as the “SEC Regulations.” In our opinion, the proved, probable and possible reserves presented in this report comply with the definitions, guidelines and disclosure requirements as required by the SEC regulations.

Future Production Rates

For wells currently on production, our forecasts of future production rates are based on historical performance data. If no production decline trend has been established, future production rates were held constant, or adjusted for the effects of curtailment where appropriate, until a decline in ability to produce was anticipated. An estimated rate of decline was then applied to depletion of the reserves. If a decline trend has been established, this trend was used as the basis for estimating future production rates.

Test data and other related information were used to estimate the anticipated initial production rates for those wells or locations that are not currently producing. For reserves not yet on production, sales were estimated to commence at an anticipated date furnished by Ridgewood. Wells or locations that are not currently producing may start producing earlier or later than anticipated in our estimates due to unforeseen factors causing a change in the timing to initiate production. Such factors may include delays due to weather, the availability of rigs, the sequence of drilling, completing and/or recompleting wells and/or constraints set by regulatory bodies.

The future production rates from wells currently on production or wells or locations that are not currently producing may be more or less than estimated because of changes including, but not limited to, reservoir performance, operating conditions related to surface facilities, compression and artificial lift, pipeline capacity and/or operating conditions, producing market demand and/or allowables or other constraints set by regulatory bodies.

Hydrocarbon Prices

The hydrocarbon prices used herein are based on SEC price parameters using the average prices during the 12-month period prior to the ending date of the period covered in this report, determined as the unweighted arithmetic averages of the prices in effect on the first-day-of-the-month for each month within such period.

Ridgewood furnished us with the above mentioned average prices in effect on December 31, 2009. These initial SEC hydrocarbon prices were determined using the 12-month average first-day-of-the-month benchmark prices appropriate to the geographic area where the hydrocarbons are sold. These benchmark prices are prior to the adjustments for differentials as described herein. The table below summarizes the “benchmark prices” and “price reference” used for the geographic area included in the report.

The product prices that were actually used to determine the future gross revenue for each property reflect adjustments to the benchmark prices for gravity, quality, local conditions, gathering and transportation fees and/or distance from market, referred to herein as “differentials.” The differentials used in the preparation of this report were supplied to us by Ridgewood. The differentials furnished to us were accepted as factual data and reviewed by us for their reasonableness; however, we have not conducted an independent verification of the data used by Ridgewood to determine these differentials.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 10

In addition, the table below summarizes the net volume weighted benchmark prices adjusted for differentials and referred to herein as the “average realized prices.” The average realized prices shown in the table below were determined from the total future gross revenue before production taxes and the total net reserves for the geographic area and presented in accordance with SEC disclosure requirements for each of the geographic areas included in the report.

Geographic Area	Product	Price Reference	Avg Benchmark Prices	Avg Realized Prices
North America
United States	Oil/Condensate	WTI Cushing	$61.18/Bbl	$57.69/Bbl
	NGLs	WTI Cushing	$61.18/Bbl	$33.65/Bbl
	Gas	Henry Hub	$3.87/MMBTU	$3.98/MCF

The effects of derivative instruments designated as price hedges of oil and gas quantities are not reflected in our individual property evaluations.

Costs

Operating costs for the leases and wells in this report are based on the operating expense reports of Ridgewood and include only those costs directly applicable to the leases or wells. The operating costs include a portion of general and administrative costs allocated directly to the leases and wells. For operated properties, the operating costs include an appropriate level of corporate general administrative and overhead costs. The operating costs for non-operated properties include the COPAS overhead costs that are allocated directly to the leases and wells under terms of operating agreements. Certain gas, oil and condensate processing and handling fees, including compression fees where applicable, are included as “other” costs. The operating costs furnished to us were accepted as factual data and reviewed by us for their reasonableness; however, we have not conducted an independent verification of the operating cost data used by Ridgewood. No deduction was made for loan repayments, interest expenses, or exploration and development prepayments that were not charged directly to the leases or wells.

Development costs were furnished to us by Ridgewood and are based on authorizations for expenditure for the proposed work or actual costs for similar projects. The development costs furnished to us were accepted as factual data and reviewed by us for their reasonableness; however, we have not conducted an independent verification of these costs. The estimated net cost of abandonment after salvage was included for properties where abandonment costs net of salvage were significant. The estimates of the net abandonment costs furnished by Ridgewood were accepted without independent verification.

The proved, probable and possible non-producing and undeveloped reserves in this report have been incorporated herein in accordance with Ridgewood’s plans to develop these reserves as of December 31, 2009. The implementation of Ridgewood’s development plans as presented to us and incorporated herein is subject to the approval process adopted by Ridgewood’s management. As the result of our inquires during the course of preparing this report, Ridgewood has informed us that the development activities included herein have been subjected to and received the internal approvals required by Ridgewood’s management at the appropriate local, regional and/or corporate level. In addition to the internal approvals as noted, certain development activities may still be subject to specific partner AFE processes, Joint Operating Agreement (JOA) requirements or other administrative approvals external to Ridgewood. Additionally, Ridgewood has informed us that they are not aware of any legal, regulatory, political or economic obstacles that would significantly alter their plans.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 11

Current costs used by Ridgewood were held constant throughout the life of the properties.

Standards of Independence and Professional Qualification

Ryder Scott is an independent petroleum engineering consulting firm that has been providing petroleum consulting services throughout the world for over seventy years. Ryder Scott is employee-owned and maintains offices in Houston, Texas; Denver, Colorado; and Calgary, Alberta, Canada. We have over eighty engineers and geoscientists on our permanent staff. By virtue of the size of our firm and the large number of clients for which we provide services, no single client or job represents a material portion of our annual revenue. We do not serve as officers or directors of any publicly-traded oil and gas company and are separate and independent from the operating and investment decision-making process of our clients. This allows us to bring the highest level of independence and objectivity to each engagement for our services.

Ryder Scott actively participates in industry-related professional societies and organizes an annual public forum focused on the subject of reserves evaluations and SEC regulations. Many of our staff have authored or co-authored technical papers on the subject of reserves related topics. We encourage our staff to maintain and enhance their professional skills by actively participating in ongoing continuing education.

Prior to becoming an officer of the Company, Ryder Scott requires that staff engineers and geoscientists have received professional accreditation in the form of a registered or certified professional engineer’s license or a registered or certified professional geoscientist’s license, or the equivalent thereof, from an appropriate governmental authority or a recognized self-regulating professional organization.

We are independent petroleum engineers with respect to Ridgewood. Neither we nor any of our employees have any interest in the subject properties and neither the employment to do this work nor the compensation is contingent on our estimates of reserves for the properties which were reviewed.

The results of this study, presented herein, are based on technical analysis conducted by teams of geoscientists and engineers from Ryder Scott. The professional qualifications of the undersigned, the technical persons primarily responsible for overseeing, reviewing and approving the evaluation of the reserves information discussed in this report, are included as an attachment to this letter.

Terms of Usage

The results of our third party study, presented in report form herein, were prepared in accordance with the disclosure requirements set forth in the SEC regulations and intended for public disclosure as an exhibit in filings made with the SEC by Ridgewood.

We have provided Ridgewood with a digital version of the original signed copy of this report letter. In the event there are any differences between the digital version included in filings made by Ridgewood and the original signed report letter, the original signed report letter shall control and supersede the digital version.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Ridgewood Energy Corporation

February 9, 2010

Page 12

The data and work papers used in the preparation of this report are available for examination by authorized parties in our offices. Please contact us if we can be of further service.

	Very truly yours,

	RYDER SCOTT COMPANY, L.P.
	TBPE Firm Registration No. F-1580


	\s\ Stephen E. Gardner

	Stephen E. Gardner, P.E.
	TBPE License No. 100578
	Senior Petroleum Engineer




	\s\ John E. Hamlin

	John E. Hamlin, P.E.
	TBPE License No. 65319
	Managing Senior Vice President

SEG-JEH/sm

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Professional Qualifications of Primary Technical Person

The conclusions presented in this report are the result of technical analysis conducted by teams of geoscientists and engineers from Ryder Scott Company, L.P. Mr. Stephen E. Gardner is the primary technical person responsible for the estimate of the reserves, future production and income in this report.

Mr. Gardner, an employee of Ryder Scott Company L.P. (Ryder Scott) since 2006, is a Senior Petroleum Engineer responsible for coordinating and supervising staff and consulting engineers of the company in ongoing reservoir evaluation studies throughout North America. Before joining Ryder Scott, Mr. Gardner served in a number of engineering positions with Exxon Mobil Corporation. For more information regarding Mr. Gardner’s geographic and job specific experience, please refer to the Ryder Scott Company website at http://www.ryderscott.com/Experience/Employees.php.

Mr. Gardner earned a Bachelor of Science degree in Mechanical Engineering from Brigham Young University in 2001, summa cum laude, and is a registered Professional Engineer in the State of Texas. He is also a member of the Society of Petroleum Engineers.

In addition to gaining experience and competency through prior work experience, the Texas Board of Professional Engineers requires a minimum of 15 hours of continuing education annually, including at least 1 hour in the area of professional ethics, which Mr. Gardner fulfills. As part of his 2009 continuing education hours, Mr. Gardner attended an internally presented 18 hours of formalized training and two professional society presentations relating to the definitions and disclosure guidelines contained in the United States Securities and Exchange Commission Title 17, Code of Federal Regulations, Modernization of Oil and Gas Reporting, Final Rule released January 14, 2009 in the Federal Register. Mr. Gardner attended an additional 36 hours of formalized in-house training as well as 16 hours of formalized external training during 2009 covering such topics as the SPE/WPC/AAPG/SPEE Petroleum Resources Management System, reservoir engineering, geoscience and petroleum economics evaluation methods, procedures, software and ethics for consultants.

Based on his educational background, professional training and more than 5 years of practical experience in the estimation and evaluation of petroleum reserves, Mr. Gardner has attained the professional qualifications as a Reserves Estimator set forth in Article III of the “Standards Pertaining to the Estimating and Auditing of Oil and Gas Reserves Information” promulgated by the Society of Petroleum Engineers as of February 19, 2007.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

Professional Qualifications of Primary Technical Person

The conclusions presented in this report are the result of technical analysis conducted by teams of geoscientists and engineers from Ryder Scott Company, L.P. Mr. John E. Hamlin was the primary technical person responsible for overseeing the estimate of the reserves, future production, and income presented herein.

Mr. Hamlin, an employee of Ryder Scott Company L.P. (Ryder Scott) since 1979, is a Managing Senior Vice President and also serves as an Engineering Group Supervisor responsible for coordinating and supervising staff and consulting engineers of the company in ongoing reservoir evaluation studies worldwide. Before joining Ryder Scott, Mr. Hamlin served in a number of engineering positions with Phillips Petroleum Corporation. For more information regarding Mr. Hamlin’s geographic and job specific experience, please refer to the Ryder Scott Company website at http://www.ryderscott.com.

Mr. Hamlin earned a Bachelor of Science degree in Petroleum Engineering from the University of Texas at Austin in 1975 and is a registered Professional Engineer in the State of Texas. He is also a member of the Society of Petroleum Engineers.

In addition to gaining experience and competency through prior work experience, the Texas Board of Professional Engineers requires a minimum of 15 hours of continuing education annually, including at least one hour in the area of professional ethics, which Mr. Hamlin fulfills. As part of his 2009 continuing education hours, Mr. Hamlin attended an internally presented 9 hours of formalized training as well as a day long public forum relating to the definitions and disclosure guidelines contained in the United States Securities and Exchange Commission Title 17, Code of Federal Regulations, Modernization of Oil and Gas Reporting, Final Rule released January 14, 2009 in the Federal Register. Mr. Hamlin attended an additional 24 hours of formalized in-house training as well as an additional 4 hours of formalized external training during 2009 covering such topics as the SPE/WPC/AAPG/SPEE Petroleum Resources Management System, reservoir engineering, geoscience and petroleum economics evaluation methods, procedures and software and ethics for consultants.

Based on his educational background, professional training and more than 33 years of practical experience in the estimation and evaluation of petroleum reserves, Mr. Hamlin has attained the professional qualifications as a Reserves Estimator and Reserves Auditor set forth in Article III of the “Standards Pertaining to the Estimating and Auditing of Oil and Gas Reserves Information” promulgated by the Society of Petroleum Engineers as of February 19, 2007.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

PETROLEUM RESERVES DEFINITIONS

As Adapted From:

RULE 4-10(a) of REGULATION S-X PART 210

UNITED STATES SECURITIES AND EXCHANGE COMMISSION (SEC)

PREAMBLE

On January 14, 2009, the United States Securities and Exchange Commission (SEC) published the “Modernization of Oil and Gas Reporting; Final Rule” in the Federal Register of National Archives and Records Administration (NARA). The “Modernization of Oil and Gas Reporting; Final Rule” includes revisions and additions to the definition section in Rule 4-10 of Regulation S-X, revisions and additions to the oil and gas reporting requirements in Regulation S-K, and amends and codifies Industry Guide 2 in Regulation S-K. The “Modernization of Oil and Gas Reporting; Final Rule,” including all references to Regulation S-X and Regulation S-K, shall be referred to herein collectively as the “SEC Regulations.” The SEC Regulations take effect for all filings made with the United States Securities and Exchange Commission as of December 31, 2009, or after January 1, 2010. Reference should be made to the full text under Title 17, Code of Federal Regulations, Regulation S-X Part 210, Rule 4-10(a) for the complete definitions, as the following definitions, descriptions and explanations rely wholly or in part on excerpts from the original document (direct passages excerpted from the aforementioned SEC document are denoted in italics herein).

Reserves are those estimated remaining quantities of petroleum which are anticipated to be economically producible, as of a given date, from known accumulations under defined conditions. All reserve estimates involve some degree of uncertainty. The uncertainty depends chiefly on the amount of reliable geologic and engineering data available at the time of the estimate and the interpretation of these data. The relative degree of uncertainty may be conveyed by placing reserves into one of two principal classifications, either proved or unproved. Unproved reserves are less certain to be recovered than proved reserves and may be further sub-classified as probable and possible reserves to denote progressively increasing uncertainty in their recoverability. Under the SEC Regulations as of December 31, 2009, or after January 1, 2010, a company may optionally disclose estimated quantities of probable or possible oil and gas reserves in documents publicly filed with the Commission. The SEC Regulations continue to prohibit disclosure of estimates of oil and gas resources other than reserves and any estimated values of such resources in any document publicly filed with the Commission unless such information is required to be disclosed in the document by foreign or state law as noted in §229.1202 Instruction to Item 1202.

Reserves estimates will generally be revised as additional geologic or engineering data become available or as economic conditions change.

Reserves may be attributed to either natural energy or improved recovery methods. Improved recovery methods include all methods for supplementing natural energy or altering natural forces in the reservoir to increase ultimate recovery. Examples of such methods are pressure maintenance, natural gas cycling, waterflooding, thermal methods, chemical flooding, and the use of miscible and immiscible displacement fluids. Other improved recovery methods may be developed in the future as petroleum technology continues to evolve.

Reserves may be attributed to either conventional or unconventional petroleum accumulations. Petroleum accumulations are considered as either conventional or unconventional based on the nature of their in-place characteristics, extraction method applied, or degree of processing prior to sale. Examples of unconventional petroleum accumulations include coalbed or coalseam methane (CBM/CSM), basin-centered gas, shale gas, gas hydrates, natural bitumen and oil shale deposits. These unconventional accumulations may require specialized extraction technology and/or significant processing prior to sale.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

PETROLEUM RESERVES DEFINITIONS

Page 2

Reserves do not include quantities of petroleum being held in inventory.

Because of the differences in uncertainty, caution should be exercised when aggregating quantities of petroleum from different reserves categories.

RESERVES (SEC DEFINITIONS)

Securities and Exchange Commission Regulation S-X §210.4-10(a)(26) defines reserves as follows:

Reserves. Reserves are estimated remaining quantities of oil and gas and related substances anticipated to be economically producible, as of a given date, by application of development projects to known accumulations. In addition, there must exist, or there must be a reasonable expectation that there will exist, the legal right to produce or a revenue interest in the production, installed means of delivering oil and gas or related substances to market, and all permits and financing required to implement the project.

Note to paragraph (a)(26): Reserves should not be assigned to adjacent reservoirs isolated by major, potentially sealing, faults until those reservoirs are penetrated and evaluated as economically producible. Reserves should not be assigned to areas that are clearly separated from a known accumulation by a non-productive reservoir (i.e., absence of reservoir, structurally low reservoir, or negative test results). Such areas may contain prospective resources (i.e., potentially recoverable resources from undiscovered accumulations).

PROVED RESERVES (SEC DEFINITIONS)

Securities and Exchange Commission Regulation S-X §210.4-10(a)(22) defines proved oil and gas reserves as follows:

Proved oil and gas reserves. Proved oil and gas reserves are those quantities of oil and gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible—from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulations—prior to the time at which contracts providing the right to operate expire, unless evidence indicates that renewal is reasonably certain, regardless of whether deterministic or probabilistic methods are used for the estimation. The project to extract the hydrocarbons must have commenced or the operator must be reasonably certain that it will commence the project within a reasonable time.

(i) The area of the reservoir considered as proved includes:

(A) The area identified by drilling and limited by fluid contacts, if any, and

(B) Adjacent undrilled portions of the reservoir that can, with reasonable certainty, be judged to be continuous with it and to contain economically producible oil or gas on the basis of available geoscience and engineering data.

(ii) In the absence of data on fluid contacts, proved quantities in a reservoir are limited by the lowest known hydrocarbons (LKH) as seen in a well penetration unless geoscience, engineering, or performance data and reliable technology establishes a lower contact with reasonable certainty.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

PETROLEUM RESERVES DEFINITIONS

Page 3

PROVED RESERVES (SEC DEFINITIONS) CONTINUED

(iii) Where direct observation from well penetrations has defined a highest known oil (HKO) elevation and the potential exists for an associated gas cap, proved oil reserves may be assigned in the structurally higher portions of the reservoir only if geoscience, engineering, or performance data and reliable technology establish the higher contact with reasonable certainty.

(iv) Reserves which can be produced economically through application of improved recovery techniques (including, but not limited to, fluid injection) are included in the proved classification when:

(A) Successful testing by a pilot project in an area of the reservoir with properties no more favorable than in the reservoir as a whole, the operation of an installed program in the reservoir or an analogous reservoir, or other evidence using reliable technology establishes the reasonable certainty of the engineering analysis on which the project or program was based; and

(B) The project has been approved for development by all necessary parties and entities, including governmental entities.

(v) Existing economic conditions include prices and costs at which economic producibility from a reservoir is to be determined. The price shall be the average price during the 12-month period prior to the ending date of the period covered by the report, determined as an unweighted arithmetic average of the first-day-of-the-month price for each month within such period, unless prices are defined by contractual arrangements, excluding escalations based upon future conditions.

PROBABLE RESERVES (SEC DEFINITIONS)

Securities and Exchange Commission Regulation S-X §210.4-10(a)(18) defines probable oil and gas reserves as follows:

Probable reserves. Probable reserves are those additional reserves that are less certain to be recovered than proved reserves but which, together with proved reserves, are as likely as not to be recovered.

(i) When deterministic methods are used, it is as likely as not that actual remaining quantities recovered will exceed the sum of estimated proved plus probable reserves. When probabilistic methods are used, there should be at least a 50 percent probability that the actual quantities recovered will equal or exceed the proved plus probable reserves estimates.

(ii) Probable reserves may be assigned to areas of a reservoir adjacent to proved reserves where data control or interpretations of available data are less certain, even if the interpreted reservoir continuity of structure or productivity does not meet the reasonable certainty criterion.

Probable reserves may be assigned to areas that are structurally higher than the proved area if these areas are in communication with the proved reservoir.

(iii) Probable reserves estimates also include potential incremental quantities associated with a greater percentage recovery of the hydrocarbons in place than assumed for proved reserves.

(iv) See also guidelines in paragraphs (a)(17)(iv) and (a)(17)(vi) of this section.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

PETROLEUM RESERVES DEFINITIONS

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POSSIBLE RESERVES (SEC DEFINITIONS)

Securities and Exchange Commission Regulation S-X §210.4-10(a)(17) defines possible oil and gas reserves as follows:

Possible reserves. Possible reserves are those additional reserves that are less certain to be recovered than probable reserves.

(i) When deterministic methods are used, the total quantities ultimately recovered from a project have a low probability of exceeding proved plus probable plus possible reserves. When probabilistic methods are used, there should be at least a 10 percent probability that the total quantities ultimately recovered will equal or exceed the proved plus probable plus possible reserves estimates.

(ii) Possible reserves may be assigned to areas of a reservoir adjacent to probable reserves where data control and interpretations of available data are progressively less certain. Frequently, this will be in areas where geoscience and engineering data are unable to define clearly the area and vertical limits of commercial production from the reservoir by a defined project.

(iii) Possible reserves also include incremental quantities associated with a greater percentage recovery of the hydrocarbons in place than the recovery quantities assumed for probable reserves.

(iv) The proved plus probable and proved plus probable plus possible reserves estimates must be based on reasonable alternative technical and commercial interpretations within the reservoir or subject project that are clearly documented, including comparisons to results in successful similar projects.

(v) Possible reserves may be assigned where geoscience and engineering data identify directly adjacent portions of a reservoir within the same accumulation that may be separated from proved areas by faults with displacement less than formation thickness or other geological discontinuities and that have not been penetrated by a wellbore, and the registrant believes that such adjacent portions are in communication with the known (proved) reservoir. Possible reserves may be assigned to areas that are structurally higher or lower than the proved area if these areas are in communication with the proved reservoir.

(vi) Pursuant to paragraph (a)(22)(iii) of this section, where direct observation has defined a highest known oil (HKO) elevation and the potential exists for an associated gas cap, proved oil reserves should be assigned in the structurally higher portions of the reservoir above the HKO only if the higher contact can be established with reasonable certainty through reliable technology. Portions of the reservoir that do not meet this reasonable certainty criterion may be assigned as probable and possible oil or gas based on reservoir fluid properties and pressure gradient interpretations.

RYDER SCOTT COMPANY PETROLEUM CONSULTANTS

RESERVES STATUS DEFINITIONS AND GUIDELINES

As Adapted From:

RULE 4-10(a) of REGULATION S-X PART 210

UNITED STATES SECURITIES AND EXCHANGE COMMISSION (SEC)

and

PETROLEUM RESOURCES MANAGEMENT SYSTEM (SPE-PRMS)

Ridgewood Energy W Fund LLC - FORM 10-K/A - EX-99 - REPORT OF RYDER SCOTT COMPANY, L.P. - August 23, 2010

Attached files

Ridgewood Energy W Fund LLC Reports