<PAGE>
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM 10-K

[X]      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                     SECURITIES EXCHANGE ACT OF 1934

                      For the year ended December 31, 2002
                                       or
[ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                     SECURITIES EXCHANGE ACT OF 1934

           For the transition period from            to
                                          ----------    ----------

                          Commission File No. 333-76911

                      MEWBOURNE ENERGY PARTNERS 00-A, L.P.

          Delaware                                         75-2866283
-------------------------------                     -----------------------
(State or other jurisdiction of                      (I.R.S. Employer
 incorporation or organization)                      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
                                                    --------------

Securities registered pursuant to Section 12(b) of the Act:   None
                                                              ----

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

Limited and general partnership interest $1,000 per interest
------------------------------------------------------------

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

No market currently exists for the limited and general partnership interest of
the registrant. Based on original purchase price the aggregate market value of
limited and general partnership interest owned by non-affiliates of the
registrant is $10,000,000.00.

The following documents are incorporated by reference into the indicated parts
of this Annual Report on Form 10-K: Part of the information called for by Part
IV of the Annual Report on Form 10-K is incorporated by reference from the
Registrant's Registration Statement on Form S-1, File No. 333-76911.



                                       1
<PAGE>
                                     PART I

ITEM 1. BUSINESS

Mewbourne Energy Partners 00-A, L.P. (the "Registrant") is a limited partnership
organized under the laws of the State of Delaware on February 15, 2000 (date of
inception). Its managing general partner is Mewbourne Development Corporation, a
Delaware corporation ("MD").

A Registration Statement was filed pursuant to the Securities Act of 1933, as
amended, registering limited partnership interests aggregating $4,000,000 and
$16,000,000 in general partnership interests in a series of Delaware limited
partnerships formed under Mewbourne Energy 99-00 Drilling Programs. The
Registrant was declared effective by the Securities and Exchange Commission on
May 5, 2000. On October 31, 2000, the offering of limited and general
partnership interests in the Registrant was closed, with interests aggregating
$10,000,000 being sold to 354 subscribers of which $9,518,000 were sold to 334
subscribers as general partner interests and $482,000 were sold to 20
subscribers as limited partner interests.

The Registrant engages primarily in oil and gas development and production and
is not involved in any other industry segment. See the selected financial data
in Item 6 and the financial statements in Item 8 of this report for a summary of
the Registrant's revenue, income and identifiable assets.

The Registrant has acquired interests in oil and gas prospects for the purpose
of development drilling. At December 31, 2002, 30 wells had been drilled and
were productive and two wells were drilled and abandoned. Of the 30 productive
wells, 27 were producing and 3 were plugged and abandoned at December 31, 2002.
The following table summarizes the Registrant's drilling activity for the years
ended December 31, 2002 and 2001, and for the period from February 15, 2000
(date of inception) through December 31, 2000:

<Table>
<Caption>

                                    2002              2001             2000
                                 -----------      ------------     ------------
                                 Gross   Net      Gross   Net      Gross   Net
                                 -----  ----      -----  -----     -----  -----
<S>                              <C>    <C>       <C>    <C>       <C>    <C>
Development Wells:
 Oil and natural gas wells         2    .157       22    5.108       6    1.293
 Non-productive wells              0       0        0        0       2     .600
</Table>

The sale of crude oil and natural gas produced by the Registrant will be
affected by a number of factors that are beyond the Registrant'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 Registrant.

The Registrant does not have long-term contracts with purchasers of its crude
oil or natural gas. The market for crude oil is such that the Registrant
anticipates it will be able to sell all the crude oil it can produce. Natural
gas will be sold to local distribution companies, gas marketers and end users on
the spot market. The spot market reflects immediate sales of natural gas without
long-term contractual commitments. The future market condition for natural gas
cannot be predicted with any certainty, and the Registrant may experience delays
in marketing natural gas production and fluctuations in natural gas prices.



                                       2
<PAGE>

Many aspects of the Registrant's activities are highly competitive including,
but not limited to, the acquisition of suitable drilling prospects and the
procurement of drilling and related oil field equipment, and are subject to
governmental regulation, both at Federal and state levels. The Registrant's
ability to compete depends on its financial resources and on the managing
general partner's staff and facilities, none of which are significant in
comparison with those of the oil and gas exploration, development and production
industry as a whole. Federal and state regulation of oil and gas operations
generally includes drilling and spacing of wells on producing acreage, the
imposition of maximum allowable production rates, the taxation of income and
other items, and the protection of the environment.

The Registrant does not have any employees of its own. MD is responsible for all
management functions. Mewbourne Oil Company ("MOC"), a wholly owned subsidiary
of Mewbourne Holdings, Inc., which is also the parent of the Registrant's
managing general partner, has been appointed Program Manager and is responsible
for activities in accordance with a Drilling Program Agreement entered into by
the Registrant, MD and MOC. At March 28, 2003, MOC employed 121 persons, many of
whom dedicated a part of their time to the conduct of the Registrant's business
during the period for which this report is filed.

The production of oil and gas is not considered subject to seasonal factors
although the price received by the Registrant for natural gas sales will tend to
increase during the winter months. Order backlog is not pertinent to the
Registrant's business.

ITEM 2. PROPERTIES

The Registrant's properties consist primarily of leasehold interests in
properties on which oil and gas wells-in-progress are located. Such property
interests are often subject to landowner royalties, overriding royalties and
other oil and gas leasehold interests.

Fractional working interests in developmental oil and gas prospects located
primarily in the Anadarko Basin of Western Oklahoma, the Texas Panhandle and
Kansas, and the Permian Basin of New Mexico and West Texas, were acquired by the
Registrant, resulting in the Registrant's participation in the drilling of oil
and gas wells. At December 31, 2002, 30 wells had been drilled and were
productive and two wells were drilled and abandoned. Of the 30 productive wells,
27 were producing and 3 were plugged and abandoned at December 31, 2002.

Reserve estimates were prepared by Forrest A Garb & Associates, Inc., the
Registrant's independent petroleum consultants, in accordance with guidelines
established by the Securities and Exchange Commission.

ITEM 3. LEGAL PROCEEDINGS

The Registrant is not aware of any pending legal proceedings to which it is a
party.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

No matter was submitted to a vote of security holders during the period ended
December 31, 2002 covered by this report.


                                       3
<PAGE>

                                     PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

At March 28, 2003, the Registrant had 10,000 outstanding limited and general
partnership interests held of record by 354 subscribers. There is no established
public or organized trading market for the limited and general partnership
interests.

Revenues which, in the sole judgement of the managing general partner, are not
required to meet the Registrant's obligations will be distributed to the
partners at least quarterly in accordance with the Registrant's Partnership
Agreement. Distributions made to limited and general partners during the years
ended December 31, 2002 and December 31, 2001, were $1,500,995 and $3,330,000
respectively.

ITEM 6. SELECTED FINANCIAL DATA

The following table sets forth selected financial data for the years ended
December 31, 2002 and 2001, and for the period from February 15, 2000 (date of
inception) through December 31, 2000:

<Table>
<Caption>
Operating results:                            2002                2001               2000
<S>                                      <C>                <C>                 <C>
Oil and gas sales                        $    1,955,985     $    4,419,274      $       83,611

Net income (loss)                        $      679,468     $   (1,400,495)     $      129,107

Net income (loss)per limited and
  general partner interest               $        67.95     $      (140.05)     $        12.91

At year end:

Total Assets                             $    4,692,834     $    5,422,848      $   10,135,563
                                         --------------     --------------      --------------
</Table>


ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

General

Mewbourne Energy Partners 00-A, L.P. (the "Registrant") was organized as a
Delaware limited partnership on February 15, 2000. The offering of limited and
general partner interests began May 5, 2000 as part of an offering registered
under the name Mewbourne Energy 99-00 Drilling Programs. The offering of limited
and general partner interests in the Registrant concluded October 31, 2000, with
total investor partner contributions of $10,000,000.

The Registrant was formed to engage primarily in the business of drilling
development wells, to produce and market crude oil and natural gas produced from
such properties, to distribute any net proceeds from operations to the general
and limited partners and to the extent necessary, acquire leases which contain
drilling prospects. The economic life of the Registrant depends on the period
over which the Registrant's oil and gas reserves are economically recoverable.


                                       4
<PAGE>

Results of Operations

The following table sets forth certain operating data for the years ended
December 31, 2002 and 2001, and for the period from February 15, 2000 (date of
inception) through December 31, 2000:

<Table>
<Caption>

                                                   2002             2001              2000
<S>                                             <C>              <C>              <C>
Production:
   Natural gas (MMcf)                                   572            1,141                9
   Oil (MBbl)                                            11                8               .2
   Natural gas equivalent (MMcfe)                       638            1,188               10
   % Natural gas                                         89%              96%              90%

Average sales price per unit
   Natural gas (per Mcf)                        $      2.93      $      3.71      $      8.58
   Oil (per Bbl)                                      25.36            24.55            27.66
   Natural gas equivalent (per Mcfe)                   3.07             3.72             8.01

Cost and expenses per Mcfe:
   Lease operating                              $       .56      $       .22              .09
   Production taxes                                     .24              .28              .63
   Administrative and general                           .12              .13              .06
   Depreciation, depletion and amortization            1.08             1.55             2.71
   Cost ceiling write-down                               --             2.75               --
</Table>

Note: The Partnership was formed during the year 2000 and began drilling oil and
gas wells. The majority of the wells were not drilled or completed until 2001
which accounts for the substantial increase in sales and production volumes
during the year ended December 31, 2001.

Year ended December 31, 2002 compared to the year ended December 31, 2001

Oil and natural gas sales. Oil and natural gas sales decreased to $1,955,985 in
2002 from $4,419,274 in 2001. Production volumes decreased to 571,547 Mcf of gas
in 2002 from 1,141,023 Mcf in 2001, while oil volumes increased to 10,989 Bbls
in 2002 from 7,826 Bbls in 2001. Oil and gas revenues declined primarily due to
one well located in western Oklahoma. The well began producing at a high rate of
production in 2001 and rapidly declined. The production rate is beginning to
stabilize, therefore, future oil and gas revenues should also begin to stabilize
subject to normal declines and price variations. A decrease in the price of gas
also contributed significantly to the decline in oil and gas revenues.

Interest income. Interest income decreased from $47,646 in 2001 to $4,782 in
2002 due to expenditures for the drilling of oil and gas wells, which resulted
in a decrease of capital available for investments.

Lease operating expense and production taxes. Lease operating expense increased
from $265,560 in 2001 to $359,649 in 2002. This expense increased due to
increased ad valorem taxes, additional new wells, workover of existing wells,
and increased compressor charges in 2002. Production taxes decreased from
$333,883 in 2001 to $151,292 in 2002. This expense decreased due to production
decreases.


                                       5
<PAGE>

Depreciation, depletion and amortization. Depreciation, depletion and
amortization decreased from $1,846,113 in 2001 to $691,224 in 2002. The decrease
is primarily due to the decline in production volumes and the reduction in oil
and gas properties resulting from the cost ceiling write-down in 2001.

Cost ceiling write-down. A cost ceiling write-down of $3,271,996 was recorded in
2001 primarily due to a decrease in the year end price of an Mcf of natural gas
from $9.13 in 2000 to $2.27 in 2001.

Year ended December 31, 2001 compared to the period from February 15, 2000 (date
of inception) through December 31, 2000

Oil and natural gas sales. Oil and natural gas sales increased to $4,419,274 in
2001 from $83,611 in 2000 due to additional wells being drilled and completed by
the Partnership during 2001, which resulted in a substantial increase in sales
revenues and production volumes. Production volumes increased to 1,141,023 Mcf
of gas in 2001 from 8,944 Mcf in 2000, while oil volumes increase to 7,826 Bbls
in 2001 from 249 Bbls in 2000.

Interest income. Interest income decreased from $81,924 in 2000 to $ 47,646 in
2001 due to expenditures for the drilling of oil and gas wells, which resulted
in a decrease of capital available for investments.

Lease operating expense and production taxes. Lease operating expense increased
from $929 in 2000 to $265,560 in 2001. Production taxes increased from $6,546 in
2000 to $333,883 in 2001. These expenses increased as additional wells were
drilled and completed in 2001.

Depreciation, depletion and amortization. Depreciation, depletion and
amortization increased from $28,285 in 2000 to $1,846,113 in 2001 as additional
wells were drilled and producing and therefore depleting their reserves.

Cost ceiling write-down. A cost ceiling write-down of $3,271,996 was recorded in
2001 primarily due to a decrease in the year end price of an Mcf of natural gas
from $9.13 in 2000 to $2.27 in 2001.

Liquidity and capital resources

Net cash decreased by $678,106 during the year ended December 31, 2002. Cash
flows from operating activities were offset by funds utilized primarily for
drilling and completion costs and cash distributions to partners. All wells for
which funds have been committed have been drilled, therefore, future capital
requirements are not expected to be material in nature and will be paid with
revenues generated through oil and gas sales.

Net cash decreased by $1,894,661 during the year ended December 31, 2001. These
funds were utilized primarily for drilling and completion costs.


                                       6
<PAGE>

Critical Accounting Policies

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

Significant estimates inherent in the Registrant's financial statements include
the estimate of oil and gas reserves as reported in the footnotes to the
financial statements. Changes in oil and gas prices, changes in production
estimates and the success or failure of future development activities could have
a significant effect on reserve estimates. The reserve estimates directly impact
the computation of depreciation, depletion and amortization, and the ceiling
test for the Registrants oil and gas properties.

The Registrant follows the full-cost method of accounting for its oil and gas
activities. Under the full-cost method, all productive and nonproductive 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. Oil
and gas properties are subject to an annual 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.

All financing activities of the Registrant are reported in the financial
statements. The Registrant does not engage in any off-balance sheet financing
arrangements.

In June 2001, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 143 (FAS 143), Accounting for Asset
Retirement Obligations. This statement changes financial accounting and
reporting for obligations associated with the retirement and disposal of
long-lived assets and the associated asset retirement costs and is effective for
the Partnership beginning January 1, 2003. The Partnership is currently
evaluating the effect of adopting FAS 143.

In June 2002, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 146 (FAS 146), Accounting for Costs
Associated with Exit or Disposal Activities. This Statement addresses financial
accounting and reporting for costs associated with exit or disposal activities
and is effective for the Partnership beginning January 1, 2003. The adoption of
FAS 146 is not expected to have a material impact on the Partnership's financial
statements.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The required financial statements of the Registrant are contained in a separate
section of this report following the signature attestation. See "Item 15.
Exhibits, Financial Statement Schedules and Reports on Form 8-K".

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE

None.
                                       7
<PAGE>
                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

The Registrant does not have any officers or directors. Under the Registrant's
Partnership Agreement, the Registrant's managing general partner, MD, is granted
the exclusive right and full authority to manage, control and administer the
Registrant's business. MD is a wholly-owned subsidiary of Mewbourne Holdings,
Inc.

Set forth below are the names, ages and positions of the directors and executive
officers of MD, the Registrant's managing general partner. Directors of MD are
elected to serve until the next annual meeting of stockholders or until their
successors are elected and qualified.

<Table>
<Caption>
                                Age as of
                              December 31,
Name                              2002                        Position
----                          ------------             ------------------------
<S>                           <C>                      <C>
Curtis W. Mewbourne                67                  President and Director

J. Roe Buckley                     40                  Vice President and Chief
                                                       Financial Officer

Alan Clark                         50                  Treasurer


Michael F. Shepard                 56                  Secretary and General
                                                       Counsel

Dorothy M. Cuenod                  42                  Assistant Secretary
                                                       and Director

Ruth M. Buckley                    41                  Assistant Secretary
                                                       and Director

Julie M. Greene                    39                  Assistant Secretary
                                                       and Director
</Table>

                                       8
<PAGE>



           CURTIS W. MEWBOURNE, age 67, formed Mewbourne Holdings, Inc. in 1965
and serves as Chairman of the Board and President of Mewbourne Holdings, MOC and
MD. He has operated as an independent oil and gas producer for the past 38
years. Mr. Mewbourne received a Bachelor of Science Degree in Petroleum
Engineering from the University of Oklahoma in 1957. Mr. Mewbourne is the father
of Dorothy M. Cuenod, Ruth M. Buckley, and Julie M. Greene and the father-in-law
of J. Roe Buckley.

           J. ROE BUCKLEY, age 40, joined Mewbourne Holdings, Inc. in July, 1990
and serves as Vice President and Chief Financial Officer of both MD and MOC. Mr.
Buckley was employed by MBank Dallas from 1985-1990 where he served as a
commercial loan officer. He received a Bachelor of Arts in Economics from
Sewanee in 1984. Mr. Buckley is the son-in-law of Curtis W. Mewbourne and is
married to Ruth M. Buckley. He is also the brother-in-law of Dorothy M. Cuenod
and Julie M. Greene.

           ALAN CLARK, age 50, joined Mewbourne Oil Company in 1979 and serves
as Treasurer and Controller of both MD and MOC. Prior to joining MOC, Mr. Clark
was employed by Texas Oil and Gas Corporation as Assistant Supervisor of joint
interest accounting from 1976 to 1979. Mr. Clark has served in several
accounting/finance positions with Mewbourne Oil Company prior to his current
assignment. Mr. Clark received a Bachelor of Business Administration from the
University of Texas at Arlington.

           MICHAEL F. SHEPARD, age 56, joined MOC in 1986 and serves as
Secretary and General Counsel of MD. He has practiced law exclusively in the oil
and gas industry since 1979 and formerly was counsel with Parker Drilling
Company and its Perry Gas subsidiary for seven years. Mr. Shepard holds the
Juris Doctor degree from the University of Tulsa where he received the National
Energy Law and Policy Institute award as the outstanding graduate in the Energy
Law curriculum. He received a B.A. degree, magna cum laude, from the University
of Massachusetts in 1976. Mr. Shepard is a member of the bar in Texas and
Oklahoma.

           DOROTHY MEWBOURNE CUENOD, age 42, received a B.A. Degree in Art
History from The University of Texas and a Masters of Business Administration
Degree from Southern Methodist University. Since 1984 she has served as a
Director and Assistant Secretary of both MD and MOC. Ms. Cuenod is the daughter
of Curtis W. Mewbourne and is the sister of Ruth M. Buckley and Julie M. Greene.
She is also the sister-in-law of J. Roe Buckley.

           RUTH MEWBOURNE BUCKLEY, age 41, received a Bachelor of Science Degree
in both Engineering and Geology from Vanderbilt University. Since 1987 she has
served as a Director and Assistant Secretary of both MD and MOC. Ms. Buckley is
the daughter of Curtis W. Mewbourne and is the sister of Dorothy M. Cuenod and
Julie M. Greene. She is also the wife of J. Roe Buckley.

           JULIE MEWBOURNE GREENE, age 39, received a B.A. in Business
Administration from the University of Oklahoma. Since 1988 she has served as a
Director and Assistant Secretary of both MD and MOC. Prior to that time she was
employed by Rauscher, Pierce, Refsnes, Inc. Ms. Greene is the daughter of Curtis
W. Mewbourne and is the sister of Dorothy M. Cuenod and Ruth M. Buckley. She is
also the sister-in-law of J. Roe Buckley.

                                       9
<PAGE>

ITEM 11. EXECUTIVE COMPENSATION

The Registrant does not have any directors or officers. Management of the
Registrant is vested in the managing general partner. None of the officers or
directors of MD or MOC will receive remuneration directly from the Registrant,
but will continue to be compensated by their present employers. The Registrant
will reimburse MD and MOC and affiliates thereof for certain costs of overhead
falling within the definition of Administrative Costs, including without
limitation, salaries of the officers and employees of MD and MOC; provided that
no portion of the salaries of the directors or of the executive officer of MOC
or MD may be reimbursed as Administrative Costs.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

(a)  Beneficial owners of more than five percent

<Table>
<Caption>

                         Name of        Amount & Nature           Percent
                        Beneficial        of Beneficial              of
Title of Class            Owner               Owner                Class
--------------          ----------      ---------------           -------
<S>                     <C>             <C>                       <C>
     None                 None                 N/A                  N/A
</Table>

(b)  Security ownership of management

The Registrant does not have any officers or directors. The managing general
partner of the Registrant, MD, has the exclusive right and full authority to
manage, control and administer the Registrant's business. Under the Registrant's
Partnership Agreement, limited and general partners holding a majority of the
outstanding limited and general partnership interests hdave the right to take
certain actions, including the removal of the managing general partner. The
Registrant is not aware of any current arrangement or activity that may lead to
such removal.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

Transactions with MD and its affiliates

Pursuant to the Registrant's Partnership Agreement, the Registrant had the
following related party transactions with MD and its affiliates during the years
ended December 31, 2002 and 2001, and for the period from February 15, 2000
(date of inception) through December 31, 2000:

<Table>
<Caption>

                                                        2002                2001             2000
<S>                                                   <C>                 <C>              <C>
           Administrative & general expense
           and payment of well charges and
           supervision charges in
           accordance with standard
           industry operating agreements              $237,830            $755,227         $77,393
</Table>

The Registrant participates in oil and gas activities through a drilling program
created by the Drilling Program Agreement (the "Program"). Pursuant to the
Program, MD pays approximately 30% of the Program's capital expenditures and
approximately 40% of its operating and general and administrative expenses. The
Registrant pays the remainder of the costs and expenses of the Program. In
return, MD is allocated approximately 40% of the Program's revenues.


                                       10
<PAGE>

                                     PART IV

ITEM 14. DISCLOSURE CONTROLS AND PROCEDURES

Mewbourne Development Corporation ("MDC"), the Managing General Partner of the
Partnership, 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. Within 90 days prior to the filing of this
report, MDC's Chief Executive Officer and Chief Financial Officer have evaluated
the effectiveness of the design and operation of our disclosure controls and
procedures with the assistance and participation of other members of management.
Based upon that evaluation, MDC's Chief Executive Officer and Chief Financial
Officer concluded that our disclosure controls and procedures are effective 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 significant changes in MDC's internal controls or in other factors which
could significantly affect internal controls subsequent to the date MDC carried
out its evaluation.

ITEM 15. EXHIBITS, FINANCIAL STATEMENTS, FINANCIAL STATEMENT SCHEDULES AND
REPORTS ON FORM 8-K.

(a)        1.        Financial statements
                     The following are filed as part of this annual report:

                               Report of Independent Accountants

                               Balance sheets as of December 31, 2002 and 2001

                               Statements of income (loss) for the years ended
                               December 31, 2002 and 2001, and for the period
                               from February 15, 2000 (date of inception)
                               through December 31, 2000

                               Statements of changes in partners' capital for
                               the years ended December 31, 2002 and 2001, and
                               for the period from February 15, 2000 (date of
                               inception) through December 31, 2000

                               Statements of cash flows for the years ended
                               December 31, 2002 and 2001, and for the period
                               from February 15, 2000 (date of inception)
                               through December 31, 2000

                               Notes to financial statements

           2.        Financial statement schedules
                     None.
                     All required information is in the financial statements or
                     the notes thereto, or is not applicable or required.

           3.        Exhibits
                     The exhibits listed on the accompanying index are filed or
                     incorporated by reference as part of this annual report.

(b)        Reports on Form 8-K
           None.

                                       11
<PAGE>


                                   SIGNATURES


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


                                   MEWBOURNE ENERGY PARTNERS 00-A, L.P.

                                   By:  Mewbourne Development Corporation
                                        Managing General Partner


                                   By:  /s/ Curtis W. Mewbourne
                                        -----------------------------------
                                        Curtis W. Mewbourne
                                        President and Director
                                        (Principal Executive Officer)

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


/s/ Curtis W. Mewbourne        President/Director             March 28, 2003
----------------------------
Curtis W. Mewbourne

/s/ J. Roe Buckley             Vice President/Chief           March 28, 2003
----------------------------   Financial Officer
J. Roe Buckley

/s/ Alan Clark                 Treasurer                      March 28, 2003
----------------------------
Alan Clark

/s/ Dorothy M. Cuenod          Director                       March 28, 2003
----------------------------
Dorothy M. Cuenod

/s/ Ruth M. Buckley            Director                       March 28, 2003
----------------------------
Ruth M. Buckley

/s/ Julie M. Greene            Director                       March 28, 2003
----------------------------
Julie M. Greene

SUPPLEMENTAL INFORMATION TO BE FURNISHED WITH REPORTS FILED PURSUANT TO SECTION
15(d) OF THE ACT BY REGISTRANTS WHICH HAVE NOT REGISTERED SECURITIES PURSUANT TO
SECTION 12 OF THE ACT

No annual report or proxy material has been sent to the Registrant's security
holders.



                                       12
<PAGE>
CERTIFICATIONS

           I, Curtis W. Mewbourne, Chief Executive Officer of Mewbourne
Development Corporation, Managing General Partner of Mewbourne Energy Partners
00-A, L.P. (the "Registrant"), certify that:

           1. I have reviewed this annual report on Form 10-K of Mewbourne
Energy Partners, 00-A, L.P.

           2. Based on my knowledge, this annual report does not contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
annual report;

           3. Based on my knowledge, the financial statements, and other
financial information included in this annual report, fairly present in all
material respects the financial condition, results of operations and cash flows
of the registrant as of, and for, the periods presented in this annual report;

           4. The registrant's other certifying officers and I are responsible
for establishing and maintaining disclosure controls and procedures (as defined
in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:

                     a. designed such disclosure controls and procedures to
                     ensure that material information relating to the
                     registrant, including its consolidated subsidiaries, is
                     made known to us by others within those entities,
                     particularly during the period in which this annual report
                     is being prepared;

                     b. evaluated the effectiveness of the registrant's
                     disclosure controls and procedures as of a date within 90
                     days prior to the filing date of this annual report (the
                     "Evaluation Date"); and

                     c. presented in this annual report our conclusions about
                     the effectiveness of the disclosure controls and procedures
                     based on our evaluation as of the Evaluation Date;

           5. The registrant's other certifying officers and I have disclosed,
based on our most recent evaluation, to the registrant's auditors and the audit
committee of registrant's board of directors (or persons performing the
equivalent function):

                     a. all significant deficiencies in the design or operation
                     of internal controls which could adversely affect the
                     registrant's ability to record, process, summarize and
                     report financial data and have identified for the
                     registrant's auditors any material weaknesses in internal
                     controls; and

                     b. any fraud, whether or not material, that involves
                     management or other employees who have a significant role
                     in the registrant's internal controls; and

           6. The registrant's other certifying officers and I have indicated in
this annual report whether or not there were significant changes in internal
controls or in other factors that could significantly affect internal controls
subsequent to the date of our most recent evaluation, including any corrective
actions with regard to significant deficiencies and material weaknesses.

Date:   March 28, 2003.

                                /s/ Curtis W. Mewbourne
                                ------------------------------------------
                                Curtis W. Mewbourne
                                Chief Executive Officer
                                Mewbourne Development Corporation,
                                Managing General Partner of the Registrant


<PAGE>

CERTIFICATIONS

           I, J. Roe Buckley, Chief Financial Officer of Mewbourne Development
Corporation, Managing General Partner of Mewbourne Energy Partners 00-A, L.P.
(the "Registrant"), certify that:

           1. I have reviewed this annual report on Form 10-K of Mewbourne
Energy Partners, 00-A, L.P.

           2. Based on my knowledge, this annual report does not contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
annual report;

           3. Based on my knowledge, the financial statements, and other
financial information included in this annual report, fairly present in all
material respects the financial condition, results of operations and cash flows
of the registrant as of, and for, the periods presented in this annual report;

           4. The registrant's other certifying officers and I are responsible
for establishing and maintaining disclosure controls and procedures (as defined
in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:

                     a. designed such disclosure controls and procedures to
                     ensure that material information relating to the
                     registrant, including its consolidated subsidiaries, is
                     made known to us by others within those entities,
                     particularly during the period in which this annual report
                     is being prepared;

                     b. evaluated the effectiveness of the registrant's
                     disclosure controls and procedures as of a date within 90
                     days prior to the filing date of this annual report (the
                     "Evaluation Date"); and

                     c. presented in this annual report our conclusions about
                     the effectiveness of the disclosure controls and procedures
                     based on our evaluation as of the Evaluation Date;

           5. The registrant's other certifying officers and I have disclosed,
based on our most recent evaluation, to the registrant's auditors and the audit
committee of registrant's board of directors (or persons performing the
equivalent function):

                     a. all significant deficiencies in the design or operation
                     of internal controls which could adversely affect the
                     registrant's ability to record, process, summarize and
                     report financial data and have identified for the
                     registrant's auditors any material weaknesses in internal
                     controls; and

                     b. any fraud, whether or not material, that involves
                     management or other employees who have a significant role
                     in the registrant's internal controls; and

           6. The registrant's other certifying officers and I have indicated in
this annual report whether or not there were significant changes in internal
controls or in other factors that could significantly affect internal controls
subsequent to the date of our most recent evaluation, including any corrective
actions with regard to significant deficiencies and material weaknesses.

Date:   March 28, 2003.

                              /s/ J. Roe Buckley
                              ------------------------------------------
                              J. Roe Buckley
                              Chief Financial Officer
                              Mewbourne Development Corporation,
                              Managing General Partner of the Registrant



<PAGE>





                      MEWBOURNE ENERGY PARTNERS 00-A, L.P.

                              FINANCIAL STATEMENTS

                     WITH REPORT OF INDEPENDENT ACCOUNTANTS

     FOR THE YEARS ENDED DECEMBER 31, 2002 AND 2001, AND FOR THE PERIOD FROM
        FEBRUARY 15, 2000 (DATE OF INCEPTION) THROUGH DECEMBER 31, 2000








                                       13
<PAGE>

                        REPORT OF INDEPENDENT ACCOUNTANTS



To the Partners of
Mewbourne Energy Partners 00-A, L.P.
and to the Board of Directors of
Mewbourne Development Corporation:

In our opinion, the accompanying balance sheets and the related statements of
income (loss), changes in partners' capital and cash flows present fairly, in
all material respects, the financial position of Mewbourne Energy Partners 00-A,
L.P. at December 31, 2002 and 2001, and the results of its operations and its
cash flows for the years ended December 31, 2002 and 2001, and for the period
from February 15, 2000 (date of inception) through December 31, 2000, in
conformity with accounting principles generally accepted in the United States of
America. These financial statements are the responsibility of the Partnership's
management; our responsibility is to express an opinion on these financial
statements based on our audits. We conducted our audits in accordance with
auditing standards generally accepted in the United States of America which
require that we plan and perform the audit to obtain reasonable assurance about
whether the financial statements are free of material misstatement. An audit
includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements, assessing the accounting principles
used and significant estimates made by management, and evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.


/s/ PricewaterhouseCoopers LLP


Dallas, Texas
March 28, 2003



                                       14
<PAGE>

                      MEWBOURNE ENERGY PARTNERS 00-A, L. P.



                                 BALANCE SHEETS
                           December 31, 2002 and 2001

<Table>

                                                 2002                2001

<S>                                         <C>                 <C>
ASSETS

Cash and cash equivalents                   $          175      $      678,281
Accounts receivable, affiliates                    472,581             335,986
                                            --------------      --------------
           Total current assets                    472,756           1,014,267
                                            --------------      --------------

Oil and gas properties at cost,
   full cost method                             10,057,696           9,554,975
Less accumulated depreciation,
   depletion and amortization                   (5,837,618)         (5,146,394)
                                            --------------      --------------
                                                 4,220,078           4,408,581
                                            --------------      --------------

           Total assets                     $    4,692,834      $    5,422,848
                                            ==============      ==============
</Table>



LIABILITIES AND PARTNERS' CAPITAL

Accounts payable, affiliate                 $      115,749      $       24,236
                                            --------------      --------------

Partners' capital
   General partners                              4,356,470           5,138,399
   Limited partners                                220,615             260,213
                                            --------------      --------------
           Total partners' capital               4,577,085           5,398,612
                                            --------------      --------------

Total liabilities and partners' capital     $    4,692,834      $    5,422,848
                                            ==============      ==============


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

                                       15
<PAGE>
                      MEWBOURNE ENERGY PARTNERS 00-A, L. P.

                           STATEMENTS OF INCOME (LOSS)
       For the years ended December 31, 2002 and 2001, and for the period
      from February 15, 2000 (date of inception) through December 31, 2000

<Table>
<Caption>

                                                 2002             2001             2000

<S>                                          <C>              <C>               <C>
Revenues and other income:

Oil and gas sales                            $  1,955,985     $  4,419,274      $     83,611
Interest income                                     4,782           47,646            81,924
                                             ------------     ------------      ------------
                                                1,960,767        4,466,920           165,535
                                             ------------     ------------      ------------

Expenses:

Lease operating expense                           359,649          265,560               929
Production taxes                                  151,292          333,883             6,546
Administrative and general expense                 79,134          149,863               668
Depreciation, depletion and amortization          691,224        1,846,113            28,285
Cost ceiling write-down                                 0        3,271,996                 0
                                             ------------     ------------      ------------
                                                1,281,299        5,867,415            36,428
                                             ------------     ------------      ------------

Net income (loss)                            $    679,468     $ (1,400,495)     $    129,107
                                             ============     ============      ============

Allocation of net income (loss):
General partners                             $    646,718     $ (1,332,991)     $    122,884
                                             ============     ============      ============
Limited partners                             $     32,750     $    (67,504)     $      6,223
                                             ============     ============      ============

Basic and diluted net income (loss) per
 limited and general partner interest
 (10,000 outstanding)                        $      67.95     $    (140.05)     $      12.91
                                             ============     ============      ============
</Table>


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


                                       16
<PAGE>



                      MEWBOURNE ENERGY PARTNERS 00-A, L. P.

                   STATEMENTS OF CHANGES IN PARTNERS' CAPITAL
       For the years ended December 31, 2002 and 2001, and for the period
      from February 15, 2000 (date of inception) through December 31, 2000



<Table>
<Caption>

                                    General            Limited
                                    Partners           Partners            Total
<S>                              <C>                <C>                <C>
Balance at February 15, 2000
   (date of inception)           $           0      $           0      $           0
Contributions                        9,518,000            482,000         10,000,000
Net income                             122,884              6,223            129,107
                                 -------------      -------------      -------------
Balance at December 31, 2000     $   9,640,884      $     488,223      $  10,129,107
Cash distributions                  (3,169,494)          (160,506)        (3,330,000)
Net loss                            (1,332,991)           (67,504)        (1,400,495)
                                 -------------      -------------      -------------
Balance at December 31, 2001         5,138,399            260,213          5,398,612
                                 -------------      -------------      -------------

Cash distributions                  (1,428,647)           (72,348)        (1,500,995)
Net income                             646,718             32,750            679,468
                                 -------------      -------------      -------------
Balance at December 31, 2002     $   4,356,470      $     220,615      $   4,577,085
                                 =============      =============      =============
</Table>


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


                                       17
<PAGE>


                      MEWBOURNE ENERGY PARTNERS 00-A, L. P.




                            STATEMENTS OF CASH FLOWS
       For the years ended December 31, 2002 and 2001, and for the period
      from February 15, 2000 (date of inception) through December 31, 2000

<Table>
<Caption>

                                                             2002               2001               2000

<S>                                                     <C>                <C>                <C>
Cash flows from financing activities:
   Net income (loss)                                    $     679,468      $  (1,400,495)     $     129,107
   Adjustment to reconcile net income (loss)
     to net cash provided by operating activities:
       Depreciation, depletion and amortization               691,224          1,846,113             28,285
       Cost ceiling write-down                                      0          3,271,996                  0
       Changes in operating assets and liabilities:
         Accounts receivables, affiliate                     (136,595)          (252,375)           (83,611)
         Accounts payable, affiliate                           91,513             17,690              6,546
                                                        -------------      -------------      -------------
     Net cash provided by operating activities              1,352,610          3,482,929             80,327
                                                        -------------      -------------      -------------

Cash flows from investing activities:
   Purchase of oil and gas properties                        (502,721)        (2,047,590)        (7,492,434)
   Prepaid well cost                                                0                  0            (14,951)
                                                        -------------      -------------      -------------
      Net cash used in investing activities                  (502,721)        (2,047,590)        (7,507,385)
                                                        -------------      -------------      -------------

Cash flows from financing activities:
   Capital contributions from partners                              0                  0         10,000,000
   Cash distributions to partners                          (1,500,995)        (3,330,000)                 0
     Net cash provided by (used in)                     -------------      -------------      -------------
       financing activities                                (1,500,995)        (3,330,000)        10,000,000
                                                        -------------      -------------      -------------

Net increase (decrease) in cash                              (678,106)        (1,894,661)         2,572,942

Cash, beginning of period                                     678,281          2,572,942                  0
                                                        -------------      -------------      -------------

Cash, end of period                                     $         175      $     678,281      $   2,572,942
                                                        =============      =============      =============
</Table>



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



                                       18
<PAGE>

                      MEWBOURNE ENERGY PARTNERS 00-A, L.P.
                          NOTES TO FINANCIAL STATEMENTS


1.         Significant Accounting Policies:

           Accounting for Oil and Gas Producing Activities

Mewbourne Energy Partners 00-A, L.P., (the "Partnership"), a Delaware limited
partnership engaged primarily in oil and gas development and production in
Texas, Oklahoma, New Mexico and Kansas, was organized on February 15, 2000. The
offering of limited and general partnership interests began May 5, 2000 as a
part of an offering registered under the name Mewbourne Energy Partners 99-00
Drilling Programs, (the "Program"), and concluded October 31, 2000, with total
investor contributions of $10,000,000 being sold to 354 subscribers of which
$9,518,000 were sold to 334 subscribers as general partner interests and
$482,000 were sold to 20 subscribers as limited partner interests.

The Program's sole business is the development and production of oil and gas
with a concentration on gas. Substantially all of the Program's gas reserves are
being sold regionally in the spot market. Due to the highly competitive nature
of the spot market, prices are subject to wide seasonal and regional pricing
fluctuations. In addition, such spot market sales are generally short-term in
nature and are dependent upon obtaining transportation services provided by
pipelines. The prices received for the Program's oil and gas are subject to
influences such as global consumption and supply trends.

The Partnership follows the full-cost method of accounting for its oil and gas
activities. Under the full-cost method, all productive and nonproductive 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. No
capitalized costs were excluded from amortization for the years ended December
31, 2002 and 2001. 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 an annual 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. A cost
ceiling write-down of $3,271,996 was recorded for the year ended December 31,
2001.

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

           Cash and cash equivalents

The Partnership considers all highly liquid investments, those with original
maturities of three months or less at the date of acquisition, to be cash
equivalents.

The Partnership maintains all its cash in one financial institution.

           Oil and Gas Sales

The Program's oil and condensate production is sold, title passed, and revenue
recognized at or near the Program's wells under short-term purchase contracts at
prevailing prices in accordance with arrangements which are customary in the oil
industry. Sales of gas

                                       19
<PAGE>

applicable to the Program's interest are recorded as revenue when the gas is
metered and title transferred pursuant to the gas sales contracts covering the
Program's interest in gas reserves. The Partnership uses the sales method to
recognize oil and gas revenue whereby revenue is recognized for the amount of
production taken regardless of the amount for which the Partnership is entitled
based on its working interest ownership. As of December 31, 2002 and 2001, no
material gas imbalances between the Partnership and other working interest
owners existed.

           Income Taxes

The Partnership is treated as a partnership for income tax purposes, and as a
result, income of the Partnership is reported on the tax returns of the partners
and no recognition is given to income taxes in the financial statements.

           Reclassifications

Certain reclassifications have been made to the prior year balances to conform
to current year presentation.

2.         Organization and Related Party Transactions:

The Partnership was organized on February 15, 2000. 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.

Reimbursement to MOC for supervision and other operator charges totaled
$175,577, $614,646 and $77,393 for the years ended December 31, 2002 and 2001,
and for the period from February 15, 2000 (date of inception) through December
31, 2000, respectively. Services and operator charges are billed in accordance
with the program and partnership agreements.

In general, during any particular calendar year the total amount of
administrative expenses allocated to the Partnership 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. Under this
arrangement, $62,253, $140,581, and $0 were allocated to the Partnership during
the years ended December 31, 2002 and 2001, and for the period from February 15,
2000 (date of inception) through December 31, 2000, respectively.

The Partnership participates in oil and gas activities through an income tax
partnership, the Program. The Partnership and MD are parties to the Program
agreement. The costs and revenues of the Program are allocated to MD and the
Partnership as follows:

<Table>
<Caption>

                                                               Partnership         MD
                                                               -----------        ----
<S>                                                            <C>                <C>
Revenues:
      Proceeds from disposition of depreciable and
        depletable properties                                       60%            40%
      All other revenues                                            60%            40%

Costs and expenses:
      Organization and offering costs (1)                            0%           100%
      Lease acquisition costs (1)                                    0%           100%
      Tangible and intangible drilling costs (1)                   100%             0%
      Operating costs, reporting and legal
        expenses, general and administrative
        expenses and all other costs                                60%            40%
</Table>



                                       20
<PAGE>


(1) As noted above, pursuant to the Program, MD must contribute 100% of
organization and offering costs and lease acquisition costs which will
approximate 30% of total capital costs. To the extent that organization and
offering costs and lease acquisition costs are less that 30% of total capital
costs, MD is responsible for tangible drilling costs until its share of the
Program's total capital costs reaches approximately 30%.

The partnership's financial statements reflect its respective proportionate
interest in the Program.

3.         Reconciliation of Net Income (Loss) Per Statements of Income (Loss)
With Net Income (Loss) Per Federal Income Tax Return:

The following is a reconciliation of net income (loss) per statements of income
(loss) with the net income (loss) per federal income tax return for the years
ended December 31, 2002 and 2001, and for the period from February 15, 2000
(date of inception) through December 31, 2000:

<Table>
<Caption>

                                                           2002               2001              2000

<S>                                                  <C>                <C>                <C>
Net income (loss)per statement of income (loss)      $     679,468      $  (1,400,495)     $     129,107

Intangible development costs capitalized for
  financial reporting purposes and expensed
  for tax reporting purposes                              (330,853)        (1,261,864)        (6,908,012)
Dry hole costs capitalized for financial
  reporting purposes and expensed for tax
  reporting purposes                                      (192,476)          (124,459)                 0
Depreciation, depletion and amortization for
  financial reporting purposes over amounts
  for tax reporting purposes                               399,836          1,632,066             11,669
Cost ceiling write-down for financial reporting
  purposes                                                       0          3,271,996                  0
Gain on sale of oil and gas equipment recognized
  for tax purposes                                          18,237             10,081                  0
Other                                                      (43,987)            43,987                  0
                                                     -------------      -------------      -------------
Net income (loss) per federal income tax return
  before tentative tax depletion                     $     530,225      $   2,171,312      $  (6,767,236)
                                                     =============      =============      =============
</Table>


The Partnership's financial reporting bases of its net assets exceeded the tax
bases of its net assets by $3,476,392, $3,324,536, and $6,896,343 at December
31, 2002 and 2001, and for the period from February 15, 2000 (date of inception)
through December 31, 2000, respectively.


                                       21
<PAGE>
4.         Recently Issued Accounting Standards:

In June 2001, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 143 (FAS 143), Accounting for Asset
Retirement Obligations. This statement changes financial accounting and
reporting for obligations associated with the retirement and disposal of
long-lived assets and the associated asset retirement costs and is effective for
the Partnership beginning January 1, 2003. The Partnership is currently
evaluating the effect of adopting FAS 143.

In June 2002, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 146 (FAS 146), Accounting for Costs
Associated with Exit or Disposal Activities. This Statement addresses financial
accounting and reporting for costs associated with exit or disposal activities
and is effective for the Partnership beginning January 1, 2003. The adoption of
FAS 146 is not expected to have a material impact on the Partnership's financial
statements.

5.         Supplemental Oil and Gas Information (Unaudited):

The tables presented below provide supplemental information about oil and
natural gas exploration and production activities as defined by SFAS No. 69,
"Disclosures about Oil an Gas Producing Activities".

Costs Incurred and Capitalized Costs:

Costs incurred in oil and natural gas acquisition, exploration and development
activities for the years ended December 31, 2002 and 2001, and for the period
from February 15, 2000 (date of inception) through December 31, 2000:

<Table>
<Caption>

                                                                   2002               2001             2000
<S>                                                              <C>               <C>               <C>
Costs incurred for the year:

     Development                                                 $ 502,721         $ 2,062,541       $ 7,492,434
                                                                 =========         ===========       ===========
</Table>



Capitalized costs related to oil and natural gas acquisition, exploration and
development activities for the years ended December 31, 2002 and 2001, and for
the period from February 15, 2000 (date of inception) through December 31, 2000
are as follows:

<Table>
<Caption>
                                                                 2002              2001                2000
<S>                                                         <C>                <C>                <C>
Cost of oil and natural gas properties
  at year end:

     Producing assets-Proved properties                     $  10,057,696      $   9,554,975      $   2,337,635
     Incomplete construction-Unproved properties                        0                  0          5,154,799
                                                            -------------      -------------      -------------
     Total capitalized cost                                    10,057,696          9,554,975          7,492,434
     Accumulated depletion                                     (5,837,618)        (5,146,394)           (28,285)
                                                            -------------      -------------      -------------
       Net capitalized costs                                $   4,220,078      $   4,408,581      $   7,464,149
                                                            =============      =============      =============
</Table>

Depreciation, depletion, and amortization per one thousand cubic feet of gas
equivalent was $1.08, $1.55, and $2.71 for the years ended December 31, 2002 and
2001, and for the period from February 15, 2000 (date of inception) through
December 31, 2000, respectively.

Although certain wells had been drilled, completed and began producing in
December 2000, a majority of the wells were drilled and completed subsequent to
December 31, 2000.


                                       22
<PAGE>



             Estimated Net Quantities of Proved Oil and Gas Reserves

Reserve estimates as well as certain information regarding future production and
discounted cash flows were determined by the Partnership's independent petroleum
consultants and MOC's petroleum reservoir engineers. The Partnership considers
reserve estimates to be reasonable, however, due to inherent uncertainties and
the limited nature of reservoir data, estimates of underground reserves are
imprecise and subject to change over time as additional information becomes
available.

There have been no favorable or adverse events that have caused a significant
change in estimated proved reserves since December 31, 2002. The Partnership has
no long-term supply agreements or contracts with governments or authorities in
which it acts as producer nor does it have any interest in oil and gas
operations accounted for by the equity method. All reserves are located onshore
within the United States.

<Table>
<Caption>

  Proved Reserves:
                                                       Crude Oil            Natural Gas
                                                     and Condensate         (Thousands
                                                      (bbls of Oil)        of Cubic Feet)
                                                     ---------------      ---------------
<S>                                                  <C>                  <C>
Balance at February 15, 2000 (date of inception)                   0                    0
Extension, discoveries and other additions                    33,000              661,000
Production                                                         0               (9,000)
                                                     ---------------      ---------------
Balance at December 31, 2000 (1)                              33,000              652,000
Revisions to previous estimates                              (22,000)            (250,000)
Extension, discoveries and other additions                    51,000            4,823,000
Purchase of minerals in place                                      0                5,000
Production                                                    (8,000)          (1,141,000)
                                                     ---------------      ---------------
Balance at December 31, 2001 (1)                              54,000            4,089,000
Revisions to previous estimates                               24,000              (65,000)
Extension, discoveries and other additions                     7,000              132,000
Production                                                   (11,000)            (572,000)
                                                     ---------------      ---------------
Balance at December 31, 2002 (1)                              74,000            3,584,000
                                                     ===============      ===============
</Table>

           (1) All of these reserves are categorized as proved developed as of
December 31, 2002, 2001, and 2000.


           Standardized Measure of Discounted Future Net Cash Flows:

For the years ended December 31, 2002 and 2001, and for the period from February
15, 2000 (date of inception) through December 31, 2000

The Standardized measure of discounted future net cash flows from estimated
production of proved oil and gas reserves is presented in accordance with the
provisions of Statement of Financial Accounting Standards No. 69, "Disclosures
about Oil and Gas Producing Activities" (SFAS No. 69). In computing this data,
assumptions other than those mandated by SFAS No. 69 could produce substantially
different results. The Partnership cautions against viewing this information as
a forecast of future economic conditions or revenues.

The standardized measure has been prepared assuming year-end selling prices,
year end development and production cost and a 10 percent annual discount rate.
No future income tax expense has been provided for the Partnership since it
incurs no income tax liability. (See Significant Accounting Policies -- Income
Taxes in Note 1 to the Financial Statements.) The year-end prices were $28.03
per barrel of oil and $4.16 per MCF of gas as of December 31, 2002, $17.52 per
barrel of oil and $2.27 per MCF of gas as of December 31, 2001, and $25.80 per
barrel of oil and $9.13 per MCF of gas as of December 31, 2000.



                                       23
<PAGE>
<Table>
<Caption>
                                          2002               2001                 2000

<S>                                  <C>                 <C>                 <C>
Future cash inflows                  $   17,015,601      $    9,866,225      $    6,801,005
Future production cost                   (5,436,222)         (3,305,701)         (1,039,907)
Future development cost                    (112,269)           (306,238)                  0
                                     --------------      --------------      --------------
Future net cash flows                    11,467,110           6,254,286           5,761,098
          Discount at 10 percent         (4,691,334)         (1,845,705)         (1,221,107)
                                     --------------      --------------      --------------
Standardized measure                 $    6,775,776      $    4,408,581      $    4,539,991
                                     ==============      ==============      ==============
</Table>


Summary of Changes in the Standardized Measure

<Table>
<Caption>

                                                        2002                2001               2000

<S>                                                <C>                 <C>                 <C>
Balance, beginning of period                       $    4,408,581      $    4,539,991      $            0
Changes in value of previous years
 reserves due to:
  Sale of oil and gas production,                      (1,445,044)         (3,819,831)            (83,611)
    net of related cost
  Extension, discoveries and improved
    recovery, less related cost                           306,715           5,837,247           4,623,602
  Accretion of discount                                   440,858             453,999                   0
  Development costs incurred during the year              347,262                   0                   0
  Change in estimated development cost                   (153,293)           (306,238)                  0
  Revisions of previous estimates                         116,194            (852,069)                  0
  Net change in price                                   3,594,256          (1,332,690)                  0
  Timing and other                                       (839,753)           (111,828)                  0
                                                   --------------      --------------      --------------
Balance, end of period                             $    6,775,776      $    4,408,581      $    4,539,991
                                                   ==============      ==============      ==============
</Table>



                                       24
<PAGE>



                      MEWBOURNE ENERGY PARTNERS 00-A, L.P.

                                INDEX TO EXHIBITS


<Table>
<Caption>

Exhibit No.                     Description
-----------          --------------------------------------------
<S>                  <C>
   3.1               Form of Certificate of Limited Partnership
                     (filed as Exhibit 3.1 to Registration
                     Statement on Form S-1, File No. 333-76911
                     and incorporate herein by reference)

   3.2               Form of Certificate of Amendment of the
                     Certificate of Limited Partnership
                     (filed as Exhibit 3.2 to Registration
                     Statement on Form S-1, File No. 333-76911
                     and incorporated herein by reference)

   4.1               Form of Agreement of Partnership (filed as
                     Exhibit 4.1 to Registration Statement on
                     Form S-1, File No. 333-76911 and
                     incorporated herein by reference)

   4.1.2             Amendment to Agreement of Partnership
                     (filed as Exhibit 4.1.2 to Form 10-K, filed
                     March 2001)

   4.1.3             Amendment to and Restated Agreement of
                     Partnership (filed as Exhibit 4.1.3 to Form
                     10-K, filed March 2002)

   10.1              Form of Drilling Program Agreement (filed
                     as Exhibit 10.1 to Registration Statement
                     on Form S-1, File No. 333-76911 and
                     incorporated herein by reference)

   10.3              Form of Operating Agreement (filed as
                     Exhibit 10.3 to Registration Statement on
                     Form S-1, File No. 333-76911 and
                     incorporated herein by reference)

   99.1*             Certifications of Chief Executive Officer
                     and Chief Financial Officer
</Table>

* Filed herewith