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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549



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FORM 10-Q



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|x | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | ---------------------------------------------------------------------------------------

For the quarterly period ended September 30, 2006

Or



| ̈ | TRANSITION REPORT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
|- | -------------------------------------------------------------------------------

For the transition period from  to

Commission File No. 333-113340



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MEWBOURNE ENERGY PARTNERS 04-A, L.P.



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|                                                         |  |                                        
|-------------------------------------------------------- |  | ---------------------------------------
|Delaware                                                 |  | 20-0718858                             
|(State or jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification Number)



|                                         |  |           
|---------------------------------------- |  | ----------
|3901 South Broadway, Tyler, Texas        |  | 75701     
|(Address of principal executive offices) |  | (Zip code)

Registrants Telephone Number, including area code: (903) 561-2900

Not Applicable

(Former name, former
address and former fiscal year, if changed since last report)



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Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 of 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 whether the registrant is a large accelerated filer, an accelerated filer or a non-accelerated filer. See definition of accelerated filer and large accelerated filer in Rule 12b-2 of
the Exchange Act. (Check one):

Large accelerated filer ̈Accelerated filer ̈Non-accelerated
filer  x

Indicate by check mark if the registrant is a shell company (as defined in Rule 12b-2 of the
Exchange Act).    Yes ̈No  x



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##### Table of Contents

Mewbourne Energy Partners 04-A, L.P.

INDEX



|                               |  |                                                                                                                                                               |  |         
|------------------------------ |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | --------
|                               |  |                                                                                                                                                               |  | Page No.
|Part I 
Financial Information |  |                                                                                                                                                              
|                               |  |                                                                                                                                                              
|Item 1.                        |  | Financial Statements                                                                                                                                          |  |         
|                               |  |                                                                                                                                                              
|                               |  | Condensed Balance Sheets - September 30, 2006 (Unaudited) and December 31, 2005                                                                               |  | 3       
|                               |  |                                                                                                                                                              
|                               |  | Condensed Statements of Operations (Unaudited) - For the three months ended September 30, 2006 and 2005 and the nine months ended September 30, 2006 and 2005 |  | 4       
|                               |  |                                                                                                                                                              
|                               |  | Condensed Statements of Cash Flows (Unaudited) - For the nine months ended September 30, 2006 and 2005                                                        |  | 5       
|                               |  |                                                                                                                                                              
|                               |  | Condensed Statement of Changes In Partners Capital (Unaudited) - For the nine months ended September 30, 2006                                                |  | 6       
|                               |  |                                                                                                                                                              
|                               |  | Notes to Condensed Financial Statements                                                                                                                       |  | 7       
|                               |  |                                                                                                                                                              
|Item 2.                        |  | Managements Discussion and Analysis of Financial Condition and Results of Operations                                                                         |  | 10      
|                               |  |                                                                                                                                                              
|Item 3.                        |  | Quantitative and Qualitative Disclosures about Market Risk                                                                                                    |  | 13      
|                               |  |                                                                                                                                                              
|Item 4.                        |  | Disclosure Controls and Procedures                                                                                                                            |  | 13      
|                               | 
|Part II 
Other Information    |  |                                                                                                                                                              
|                               |  |                                                                                                                                                              
|Item 1.                        |  | Legal Proceedings                                                                                                                                             |  | 13      
|                               |  |                                                                                                                                                              
|Item 6.                        |  | Exhibits and Reports on Form 8-K                                                                                                                              |  | 14      



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##### Table of Contents

Mewbourne Energy Partners 04-A, L.P.

Part I  Financial Information

Item 1. Financial Statements

CONDENSED BALANCE SHEETS

September 30, 2006 and December 31, 2005



|                                                                      |  |                   |             |   |                  |   |            |  
|--------------------------------------------------------------------- |  | ----------------- | ----------- | - | ---------------- | - | ---------- | -
|                                                                      |  | September 30,2006 |             |   | December 31,2005 |  
|                                                                      |  | (Unaudited)       |             |   |                  |  
|ASSETS                                                                |  |                   |             |   |                  |   |            |  
|                                                                      |  |                  
|Cash and cash equivalents                                             |  | $                 | 9,428       |   |                  | $ | 333,699    |  
|Accounts receivable, affiliate                                        |  |                   | 1,460,314   |   |                  |   | 4,152,601  |  
|Accounts receivable, other                                            |  |                   |            |   |                  |   | 1,841      |  
|                                                                      |  |                   |             |   |                  |   |            |  
|Total current assets                                                  |  |                   | 1,469,742   |   |                  |   | 4,488,141  |  
|                                                                      |  |                   |             |   |                  |   |            |  
|Oil and gas properties at cost, full cost method                      |  |                   | 29,363,575  |   |                  |   | 28,712,759 |  
|Less accumulated depreciation, depletion, amortization and impairment |  |                   | (16,015,061 | ) |                  |   | (5,736,266 | )
|                                                                      |  |                   |             |   |                  |   |            |  
|                                                                      |  |                   | 13,348,514  |   |                  |   | 22,976,493 |  
|                                                                      |  |                   |             |   |                  |   |            |  
|Total assets                                                          |  | $                 | 14,818,256  |   |                  | $ | 27,464,634 |  
|                                                                      |  |                   |             |   |                  |   |            |  
|LIABILITIES AND PARTNERS CAPITAL                                     |  |                   |             |   |                  |   |            |  
|                                                                      |  |                  
|Accounts payable, affiliate                                           |  | $                 | 535,347     |   |                  | $ | 372,462    |  
|                                                                      |  |                   |             |   |                  |   |            |  
|Asset retirement obligation plugging liability                        |  |                   | 387,756     |   |                  |   | 377,536    |  
|                                                                      |  |                   |             |   |                  |   |            |  
|Partners capital                                                     |  |                   |             |   |                  |   |            |  
|General partners                                                      |  |                   |            |   |                  |   | 24,252,438 |  
|Limited partners                                                      |  |                   | 13,895,153  |   |                  |   | 2,462,198  |  
|                                                                      |  |                   |             |   |                  |   |            |  
|Total partners capital                                               |  |                   | 13,895,153  |   |                  |   | 26,714,636 |  
|                                                                      |  |                   |             |   |                  |   |            |  
|Total liabilities and partners capital                               |  | $                 | 14,818,256  |   |                  | $ | 27,464,634 |  
|                                                                      |  |                   |             |   |                  |   |            |  

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



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Mewbourne Energy Partners 04-A, L.P.

CONDENSED STATEMENTS OF OPERATIONS

For the three months ended September 30, 2006 and 2005 and

the nine months ended September 30, 2006 and 2005

(Unaudited)



|                                                                                |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|------------------------------------------------------------------------------- |  | ------------------------------- | ---------- | ------------------------------ | ---- | - | --------- |  | - | ---------- | - |  | - | ----------
|                                                                                |  | Three Months EndedSeptember 30, |            | Nine months EndedSeptember 30,
|                                                                                |  | 2006                            |            |                                | 2005 |   | 2006      |  |   | 2005      
|Revenues and other income:                                                      |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|                                                                                |  |                                 |            |                               
|Oil and gas sales                                                               |  | $                               | 2,174,940  |                                |      | $ | 5,969,746 |  | $ | 7,989,101  |   |  | $ | 12,388,841
|Interest income                                                                 |  |                                 | 1,712      |                                |      |   | 7,831     |  |   | 10,734     |   |  |   | 95,081    
|                                                                                |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|Total revenues and other income                                                 |  |                                 | 2,176,652  |                                |      |   | 5,977,577 |  |   | 7,999,835  |   |  |   | 12,483,922
|                                                                                |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|Expenses:                                                                       |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|                                                                                |  |                                 |            |                               
|Lease operating expense                                                         |  |                                 | 126,183    |                                |      |   | 183,461   |  |   | 353,351    |   |  |   | 347,750   
|Production taxes                                                                |  |                                 | 173,171    |                                |      |   | 500,875   |  |   | 642,020    |   |  |   | 1,041,040 
|Administrative and general expense                                              |  |                                 | 72,021     |                                |      |   | 198,319   |  |   | 464,108    |   |  |   | 418,616   
|Depreciation, depletion, and amortization                                       |  |                                 | 746,175    |                                |      |   | 1,667,810 |  |   | 2,699,414  |   |  |   | 4,036,060 
|Cost ceiling write-down                                                         |  |                                 | 5,653,769  |                                |      |   |          |  |   | 7,579,381  |   |  |   |          
|Asset retirement obligation accretion                                           |  |                                 | 3,406      |                                |      |   | 2,781     |  |   | 10,220     |   |  |   | 11,270    
|                                                                                |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|Net income (loss):                                                              |  | $                               | (4,598,073 | )                              |      | $ | 3,424,331 |  | $ | (3,748,659 | ) |  | $ | 6,629,186 
|                                                                                |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|Allocation of net income (loss)                                                 |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|General partners                                                                |  | $                               |           |                                |      | $ | 3,108,722 |  | $ |           |   |  | $ | 6,018,196 
|                                                                                |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|Limited partners                                                                |  | $                               | (4,598,073 | )                              |      | $ | 315,609   |  | $ | (3,748,659 | ) |  | $ | 610,990   
|                                                                                |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           
|Basic and diluted net income (loss) per interest (30,000 interests outstanding) |  | $                               | (153.27    | )                              |      | $ | 114.14    |  | $ | (124.96    | ) |  | $ | 220.97    
|                                                                                |  |                                 |            |                                |      |   |           |  |   |            |   |  |   |           

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



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Mewbourne Energy Partners 04-A, L.P.

CONDENSED STATEMENTS OF CASH FLOWS

For the nine months ended September 30, 2006 and 2005

(Unaudited)



|                                                                                         |  |      |            |   |      |   |             |  
|---------------------------------------------------------------------------------------- |  | ---- | ---------- | - | ---- | - | ----------- | -
|                                                                                         |  | 2006 |            |   | 2005 |  
|Cash flows from operating activities:                                                    |  |      |            |   |      |   |             |  
|Net income (loss)                                                                        |  | $    | (3,748,659 | ) |      | $ | 6,629,186   |  
|Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |      |            |   |      |   |             |  
|Depreciation, depletion, and amortization                                                |  |      | 2,699,414  |   |      |   | 4,036,060   |  
|Cost ceiling write-down                                                                  |  |      | 7,579,381  |   |      |   |            |  
|Asset retirement obligation accretion                                                    |  |      | 10,220     |   |      |   | 11,270      |  
|Changes in operating assets and liabilities:                                             |  |      |            |   |      |   |             |  
|Accounts receivable, affiliate                                                           |  |      | 2,692,287  |   |      |   | (4,058,247  | )
|Accounts receivable, other                                                               |  |      | 1,841      |   |      |   |            |  
|Accounts payable, affiliate                                                              |  |      | 162,885    |   |      |   | 1,145,041   |  
|                                                                                         |  |      |            |   |      |   |             |  
|Net cash provided by operating activities                                                |  |      | 9,397,369  |   |      |   | 7,763,310_  |  
|                                                                                         |  |      |            |   |      |   |             |  
|Cash flows from investing activities:                                                    |  |      |            |   |      |   |             |  
|Purchase and development of oil and gas properties                                       |  |      | (650,816   | ) |      |   | (10,857,936 | )
|                                                                                         |  |      |            |   |      |   |             |  
|Net cash used in investing activities                                                    |  |      | (650,816   | ) |      |   | (10,857,936 | )
|                                                                                         |  |      |            |   |      |   |             |  
|Cash flows from financing activities:                                                    |  |      |            |   |      |   |             |  
|Cash distributions to partners                                                           |  |      | (9,070,824 | ) |      |   | (6,440,825  | )
|                                                                                         |  |      |            |   |      |   |             |  
|Net cash used in financing activities                                                    |  |      | (9,070,824 | ) |      |   | (6,440,825  | )
|                                                                                         |  |      |            |   |      |   |             |  
|Net (decrease) in cash and cash equivalents                                              |  |      | (324,271   | ) |      |   | (9,535,451  | )
|                                                                                         |  |     
|Cash and cash equivalents, beginning of period                                           |  |      | 333,699    |   |      |   | 10,630,997  |  
|                                                                                         |  |      |            |   |      |   |             |  
|Cash and cash equivalents, end of period                                                 |  | $    | 9,428      |   |      | $ | 1,095,546   |  
|                                                                                         |  |      |            |   |      |   |             |  

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



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Mewbourne Energy Partners 04-A, L.P.

CONDENSED STATEMENT OF CHANGES IN PARTNERS CAPITAL

For the nine months ended September 30, 2006

(Unaudited)



|                                                                     |  |                 |             |   |                 |   |            |       |  |   |            |  
|-------------------------------------------------------------------- |  | --------------- | ----------- | - | --------------- | - | ---------- | ----- |  | - | ---------- | -
|                                                                     |  | GeneralPartners |             |   | LimitedPartners |   |            | Total | 
|Balance at December 31, 2005                                         |  | $               | 24,252,438  |   |                 | $ | 2,462,198  |       |  | $ | 26,714,636 |  
|Conversion of general partner interests to limited partner interests |  |                 | (24,252,438 | ) |                 |   | 24,252,438 |       |  |   |           |  
|Cash distributions                                                   |  |                 |            |   |                 |   | (9,070,824 | )     |  |   | (9,070,824 | )
|Net loss                                                             |  |                 |            |   |                 |   | (3,748,659 | )     |  |   | (3,748,659 | )
|                                                                     |  |                 |             |   |                 |   |            |       |  |   |            |  
|Balance at September 30, 2006                                        |  | $               |            |   |                 | $ | 13,895,153 |       |  | $ | 13,895,153 |  
|                                                                     |  |                 |             |   |                 |   |            |       |  |   |            |  

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



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Mewbourne Energy Partners 04-A, L.P.

NOTES TO CONDENSED FINANCIAL STATEMENTS

(Unaudited)

1. Accounting
Policies

Reference is hereby made to the Registrants Annual Report on Form 10-K for 2005, which contains a summary of significant accounting policies
followed by the partnership in the preparation of its financial statements. These policies are also followed in preparing the quarterly report included herein.

In the opinion of management, the accompanying unaudited financial statements contain all adjustments of a normal recurring nature necessary to present fairly our financial position, results of operations, cash flows and partners
capital for the periods presented. The results of operations for the interim periods are not necessarily indicative of the final results expected for the full year.

2. Accounting for Oil and Gas Producing Activities

Mewbourne Energy Partners 04-A, L.P., (the Registrant or the Partnership), a Delaware limited partnership is engaged primarily in oil and gas development and production in Texas, Oklahoma, and New Mexico, and was
organized on January 27, 2004. The offering of limited and general partnership interests began June 10, 2004 as a part of an offering registered under the name Mewbourne Energy Partners 04-05 Drilling Programs and concluded August 20,
2004, with total investor contributions of $30,000,000 originally being sold to 1,118 subscribers of which $27,235,000 were sold to 1,022 subscribers as general partner interests and $2,765,000 were sold to 96 subscribers as limited partner
interests. During the quarter ended June 30, 2006 all general partner interests, other than the managing general partner, were converted to limited partner interests and accordingly all partnership interests have been reflected in the
accompanying financial statements as limited partner interests.

The Partnership follows the full-cost method of accounting for its oil and gas activities.
Under the full-cost method, all productive and non-productive costs incurred in the acquisition, exploration and development of oil and gas properties are capitalized. Depreciation, depletion and amortization of oil and gas properties subject to
amortization is computed on the units-of-production method based on the proved reserves underlying the oil and gas properties. At September 30, 2006 and 2005, all capitalized costs were subject to amortization. Proceeds from the sale or other
disposition of properties are credited to the full cost pool. Gains and losses on the sale or other disposition of properties are not recognized unless such adjustments would significantly alter the relationship between capitalized costs and the
proved oil and gas reserves. Capitalized costs are subject to a quarterly ceiling test that limits such costs to the aggregate of the present value of future net cash flows of proved reserves and the lower of cost or fair value of unproved
properties. There was a cost ceiling write-down of $7,579,381 for the nine month period ended September 30, 2006. The cost ceiling write-down was principally caused by lower gas prices at September 30, 2006.



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3. Asset Retirement Obligations

In accordance with Financial Accounting Standards Board Statement No. 143, Accounting for Asset Retirement Obligations, the Partnership has recognized an
estimated liability for future plugging and abandonment costs. The estimated liability is based on historical experience and estimated well life. The liability is discounted using the credit-adjusted risk-free rate. Revisions to the liability could
occur due to changes in well plugging and abandonment costs or well useful lives, or if federal or state regulators enact new well restoration requirements. The Partnership recognizes accretion expense in connection with the discounted liability
over the remaining life of the well.

A reconciliation of the Partnerships liability for well plugging and abandonment costs for the three months
ended September 30, 2006, is as follows:



|                             |  |   |        
|---------------------------- |  | - | -------
|Balance, beginning of period |  | $ | 377,536
|Accretion expense            |  |   | 10,220 
|                             |  |   |        
|Balance, end of period       |  | $ | 387,756
|                             |  |   |        

4. Related Party Transactions

Mewbourne Development Corporation (MD) is managing general partner and Mewbourne Oil Company (MOC) is operator of oil and gas properties owned by
the Partnership. Mewbourne Holdings, Inc. is the parent of both MD and MOC. Substantially all transactions are with MD and MOC.

In the ordinary course of
business, MOC will incur certain costs that will be passed on to well owners of the well for which the costs were incurred. The Partnership will receive their portion of these costs based upon their ownership in each well incurring the costs. These
costs are referred to as operator charges and are standard and customary in the oil and gas industry. Operator charges include recovery of gas marketing costs, fixed rate overhead, supervision, pumping, and equipment furnished by the operator.
Services and operator charges are billed in accordance with the program and partnership agreements.

In consideration for services rendered by MD in
managing the business of the Partnership, the Partnership during each of the initial three years of the Partnership will pay to MD a management fee in the amount equal to 7/10s of 1% of the subscriptions by the investor partners to the
Partnership. Effective 01/01/2006 the Partnership has elected to include the management fee as part of the full cost pool pursuant to Rule 4-10(c)(6)(iii) and (iv) of Regulation S-X. The Partnership analyzed prior periods and determined that
this change would not have been material in prior statements.

In general, during any particular calendar year the total amount of administrative expenses
allocated to the Partnership by MOC shall not exceed the greater of (a) 3.5% of the Partnerships gross revenue from the sale of oil and natural gas production during each year (calculated without any deduction for operating costs or other
costs and expenses) or (b) the sum of $50,000 plus .25% of the capital contributions of limited and general partners.



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The Partnership participates in oil and gas activities through a Drilling Program Agreement (the Program).
The Partnership and MD are parties to the Program. The costs and revenues of the Program are allocated to MD and the Partnership as follows:



|                                                                                                       |  |             |   |  |     |  
|------------------------------------------------------------------------------------------------------ |  | ----------- | - |  | --- | -
|                                                                                                       |  | Partnership |   |  | MD  |  
|Revenues:                                                                                              |  |             |   |  |     |  
|Proceeds from disposition of depreciable and depletable properties                                     |  | 70          | % |  | 30  | %
|All other revenues                                                                                     |  | 70          | % |  | 30  | %
|Costs and expenses:                                                                                    |  |             |   |  |     |  
|Sales commissions and due diligence fees (1)                                                           |  | 100         | % |  | 0   | %
|Organization and offering costs (2)                                                                    |  | 0           | % |  | 100 | %
|Lease acquisition costs (2)                                                                            |  | 0           | % |  | 100 | %
|Tangible and intangible drilling costs (2)                                                             |  | 100         | % |  | 0   | %
|Operating costs, reporting and legal expenses, general and administrative expenses and all other costs |  | 70          | % |  | 30  | %

---

|(1) | The Partnership will pay sales commissions and due diligence fees of 8% and 0.5%, respectively, of the capital contributions initially made by investor partners in exchange for
their respective interests.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | As noted above, pursuant to the Program, MD must contribute 100% of organization and offering costs and lease acquisition costs which approximate 20% of total capital costs. To the
extent that organization and offering costs and lease acquisition costs are less than 20% of total capital costs, MD is responsible for tangible drilling costs until its share of the Programs total capital costs reaches approximately 20%.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

The Partnerships financial statements reflect its respective proportionate interest in the Program.



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Item 2. Managements Discussion and Analysis of Financial Condition and Results of Operations

Liquidity and Capital Resources

Mewbourne Energy Partners 04-A, L.P. was formed January 27, 2004. The offering of limited and general
partnership interests began June 10, 2004 and concluded August 20, 2004, with total investor contributions of $30,000,000. During the quarter ended June 30, 2006, all general partner interests were converted to limited partner
interests and accordingly all partnership interests have been reflected in the accompanying financial statements as limited partner interests.

The
Partnership has acquired interests in oil and gas prospects for the purpose of development drilling. The Partnership participated in the drilling of 78 wells. 73 wells were productive and five wells were abandoned.

Future capital requirements and operations will be conducted with available funds generated from oil and gas activities. No bank borrowing is anticipated. The
Partnership had net working capital of $934,395 at September 30, 2006.

During the nine months ended September 30, 2006, the Partnership made
cash distributions to the investor partners in the amount of $9,070,824 as compared to $6,440,825 for the nine months ended September 30, 2005. The Partnership expects that cash distributions will continue during 2006 as additional oil and gas
revenues are sufficient to produce cash flows from operations.

The sale of crude oil and natural gas produced by the Partnership will be affected by a
number of factors that are beyond the Partnerships control. These factors include the price of crude oil and natural gas, the fluctuating supply of and demand for these products, competitive fuels, refining, transportation, extensive federal
and state regulations governing the production and sale of crude oil and natural gas, and other competitive conditions. It is impossible to predict with any certainty the future effect of these factors on the Partnership.



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##### Table of Contents

Results of Operations

Three months ended September 30, 2006 as compared to the three months ended September 30, 2005.

Oil and gas revenues.



|                  |  |                                 |           |      |   |          
|----------------- |  | ------------------------------- | --------- | ---- | - | ---------
|                  |  | Three Months EndedSeptember 30,
|                  |  | 2006                            |           | 2005
|Oil and gas sales |  | $                               | 2,174,940 |      | $ | 5,969,746
|Barrels produced  |  |                                 | 2,077     |      |   | 5,055    
|Mcf produced      |  |                                 | 348,248   |      |   | 693,795  
|Average price/bbl |  | $                               | 67.14     |      | $ | 60.37    
|Average price/mcf |  | $                               | 5.84      |      | $ | 8.16     

As shown in the table above, total oil and gas sales decreased $3,794,806 (63.6%) for the three months ended
September 30, 2006 as compared to the three months ended September 30, 2005. Of this decrease, $199,928, $2,016,261 and $1,612,828, respectively, were related to decreases in volumes of oil sold, volumes of gas sold and decreases in the
average prices of gas sold. Volumes of oil and gas sold decreased 2,978 bbls of oil and 345,547 mcf of gas for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. The decrease in volumes of
oil sold was primarily due to a substantial decline in the production of three wells. The decrease in volumes of gas sold was primarily due to (i) normal declines in production and (ii) a substantial decline in the production of three
wells. The wells with a substantial decline in production are not expected to return to previous levels of production. Average gas prices decreased to $5.84 per mcf for the three months ended September 30, 2006 from $8.16 per mcf for the three
months ended September 30, 2005. These decreases were partially offset by an increase of $34,211 related to an increase in the average price of oil sold. Average oil prices increased to $67.14 per bbl for the three months ended
September 30, 2006 from $60.37 per bbl for the three months ended September 30, 2005.

Lease operations and production taxes. Lease operating
expense during the period ended September 30, 2006 totaled $126,183 as compared to $183,461 for the period ended September 30, 2005. Production taxes during the period ended September 30, 2006 totaled $173,171 as compared to $500,875
for the period ended September 30, 2005. Lease operating expense increased primarily due to the addition of five new wells from the period September 30, 2005 through September 30, 2006. The decrease in production taxes is due to the
decrease in oil and gas revenues.

Depreciation, depletion and amortization. Depreciation, depletion and amortization for the three month period ended
September 30, 2006 total $746,175 compared to $1,667,810 for the three month period ended September 30, 2005. The decrease is due to the decrease in production volumes.

Cost ceiling write-down. There was a cost ceiling write-down of $5,653,769 for the three month period ended September 30, 2006. The cost ceiling write-down was caused by lower gas prices at September 30,
2006. There was no cost ceiling write-down for the three month period ended September 30, 2005

Administrative and general expense. Administrative and
general expense for the three month period ended September 30, 2006 total $72,021 compared to $198,319 for the period ended September 30, 2005. The decrease is due to decreased administrative charges caused by decreased oil and gas
revenues. The overall decrease was reduced by management fee of $52,500 included in the full cost pool for the period ended September 30, 2006.



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Nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005.

Oil and gas revenues.



|                  |  |                                |           |      |   |           
|----------------- |  | ------------------------------ | --------- | ---- | - | ----------
|                  |  | Nine months EndedSeptember 30,
|                  |  | 2006                           |           | 2005
|Oil and gas sales |  | $                              | 7,989,101 |      | $ | 12,388,841
|Barrels produced  |  |                                | 7,676     |      |   | 11,942    
|Mcf produced      |  |                                | 1,183,373 |      |   | 1,695,624 
|Average price/bbl |  | $                              | 64.64     |      | $ | 54.26     
|Average price/mcf |  | $                              | 6.33      |      | $ | 6.92      

As shown in the table above, total oil and gas sales decreased $4,399,740 (35.5%) for the nine months ended
September 30, 2006 as compared to the nine months ended September 30, 2005. Of this decrease, $275,760, $3,240,399 and $1,007,557, respectively, were related to decreases in volumes of oil sold, volumes of gas sold and decreases in the
average prices of gas sold. Volumes of oil and gas sold decreased 4,266 bbls of oil and 512,251 mcf of gas for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. The decrease in volumes of oil
sold was primarily due to a substantial decline in the production of two wells. The decrease in volumes of gas sold was primarily due to (i) normal declines in production and (ii) a substantial decline in the production of one well. The
wells with a substantial decline in production are not expected to return to previous levels of production. Average gas prices decreased to $6.33 per mcf for the nine months ended September 30, 2006 from $6.92 per mcf for the nine months ended
September 30, 2005. These decreases were partially offset by an increase of $123,976 related to an increase in the average price of oil sold. Average oil prices increased to $64.64 per bbl for the nine months ended September 30, 2006 from
$54.26 per bbl for the nine months ended September 30, 2005.

Lease operations and production taxes. Lease operating expense during the period ended
September 30, 2006 totaled $353,351 as compared to $347,750 for the period ended September 30, 2005. Production taxes during the period ended September 30, 2006 totaled $642,020 as compared to $1,041,040 for the period ended
September 30, 2005. Lease operating expense increased primarily due to the addition of two new wells from the period September 30, 2005 through September 30, 2006. The decrease in production taxes is due to the decrease in oil and gas
revenues.

Depreciation, depletion and amortization. Depreciation, depletion and amortization for the nine month period ended September 30, 2006 total
$2,699,414 compared to $4,036,060 for the nine month period ended September 30, 2005. The decrease is due to the decline in production volumes.

Cost
ceiling write-down. There was a cost ceiling write-down of $7,579,381 for the nine month period ended September 30, 2006. The cost ceiling write-down was caused by lower gas prices at September 30, 2006. There was no cost ceiling
write-down for the nine month period ended September 30, 2005

Administrative and general expense. Administrative and general expense for the nine
month period ended September 30, 2006 total $464,108 compared to $418,616 for the period ended September 30, 2005. The overall increase is due to increased administrative expenses allocated to the Partnership by MOC and higher
general expenses for reporting costs.



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Item 3. Quantitative and Qualitative Disclosures about Market Risk

1. Interest Rate Risk

The Partnership Agreement allows borrowings from banks or other financial sources of up to 20% of the total capital contributions to the Partnership
without investor approval. Should the Partnership elect to borrow monies for additional development activity on Partnership properties, it will be subject to the interest rate risk inherent in borrowing activities. Changes in interest rates could
significantly affect the Partnerships results of operations and the amount of net cash flow available for partner distributions. Also, to the extent that changes in interest rates affect general economic conditions, the Partnership will be
affected by such changes.

2. Commodity Price Risk

The Partnership does not expect to engage in commodity futures trading or hedging activities or enter into derivative financial instrument transactions for trading or other speculative purposes. The Partnership
currently expects to sell a vast majority of its production from successful oil and gas wells on a month-to-month basis at market prices. Accordingly, the Partnership is at risk for the volatility in commodity prices inherent in the oil and gas
industry, and the level of commodity prices will have a significant impact on the Partnerships results of operations. For the nine months ended September 30, 2006, a 10% change in the price received for natural gas production would have
had an approximate $749,000 impact on our revenue.

3. Exchange Rate Risk

The Partnership currently has no income from foreign sources or operations in foreign countries that would subject it to currency exchange rate risk. The Partnership does
not currently expect to purchase any prospects located outside of either the United States or United States coastal waters in the Gulf of Mexico.

Item 4. Disclosure Controls and Procedures

MD maintains a system of controls and procedures designed to provide reasonable
assurance as to the reliability of the financial statements and other disclosures included in this report, as well as to safeguard assets from unauthorized use or disposition. MDs Chief Executive Officer and Chief Financial Officer have
evaluated the effectiveness of the design and operation of its disclosure controls and procedures with the assistance and participation of other members of management. Based upon that evaluation, MDs Chief Executive Officer and Chief Financial
Officer concluded that its disclosure controls and procedures are effective as of September 30, 2006 for gathering, analyzing and disclosing the information the Partnership is required to disclose in the reports it files under the Securities
Exchange Act of 1934 within the time periods specified in the SECs rules and forms. There have been no changes in MDCs internal controls or in other factors which has materially affected, or is reasonable likely to materially affect the
internal controls over financial reporting.

Part II  Other Information

Item 1. Legal Proceedings

None.



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Item 6. Exhibits and Reports on Form 8-K



| | (a) | Exhibits filed herewith.
| | --- | ------------------------



|     |  |                                                                            
|---- |  | ---------------------------------------------------------------------------
|31.1 |  | Certification of CEO Pursuant to Section 302 of Sarbanes-Oxley Act of 2002.
|     | 
|31.2 |  | Certification of CFO Pursuant to Section 302 of Sarbanes-Oxley Act of 2002.
|     | 
|32.1 |  | Certification of CEO Pursuant to Section 906 of Sarbanes-Oxley Act of 2002.
|     | 
|32.2 |  | Certification of CFO Pursuant to Section 906 of Sarbanes-Oxley Act of 2002.



| | (b) | Reports on Form 8-K
| | --- | -------------------

None.



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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Partnership has duly caused this report to be signed on its behalf by the undersigned thereto duly authorized.



|                        |  |                                      |  |                                  
|----------------------- |  | ------------------------------------ |  | ---------------------------------
|                        |  | Mewbourne Energy Partners 04-A, L.P.
|                        |  |                                     
|                        |  | By:                                  |  | Mewbourne Development Corporation
|                        |  |                                      |  | Managing General Partner         
|                        |  |                                     
|Date: November 14, 2006 |  |                                      |  |                                  
|                        |  |                                     
|                        |  | By:                                  |  | /s/ Alan Clark                   
|                        |  |                                      |  | Alan Clark, Treasurer            



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INDEX TO EXHIBITS



|              |  |                                                                            
|------------- |  | ---------------------------------------------------------------------------
|EXHIBITNUMBER |  | DESCRIPTION                                                                
|31.1          |  | Certification of CEO Pursuant to Section 302 of Sarbanes-Oxley Act of 2002.
|              | 
|31.2          |  | Certification of CFO Pursuant to Section 302 of Sarbanes-Oxley Act of 2002.
|              | 
|32.1          |  | Certification of CEO Pursuant to Section 906 of Sarbanes-Oxley Act of 2002.
|              | 
|32.2          |  | Certification of CFO Pursuant to Section 906 of Sarbanes-Oxley Act of 2002.



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