----

| Delaware                                  |   | 75-2220097          |
|-------------------------------------------|--------|---------------------|
| (State or other jurisdiction              |   | (I.R.S. Employer    |
| of incorporation or organization)         |   | Identification No.) |
|                                      |   |                |
| 6 Desta Drive, Suite 6500, Midland, Texas |   | 79705               |
| (Address of principal executive office)   |   | (Zip Code)          |

| Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.                                                                                                                                                                                                                                    | ¨ Yes | x No      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------|-----------|
|                                                                                                                                                                                                                                                                                                                                                       |       |      |
| Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.                                                                                                                                                                                                                               | ¨ Yes | x No      |
|                                                                                                                                                                                                                                                                                                                                                       |       |      |
| 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 |
|                                                                                                                                                                                                                                                                                                                                                       |       |      |
| Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). | ¨ Yes | ¨ No |

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

| 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. |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Large accelerated filer ¨                                                                                                                                                                                                                            |   | Accelerated filer ¨ |   | Non-accelerated filer  x |   | Smaller reporting company¨ |   |

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

|   |
|--------|

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | Page   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| Part I                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 1.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Business                                                                                                                                                    | 3      |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 1A.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Risk Factors                                                                                                                                                | 7      |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 1B.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Unresolved Staff Comments                                                                                                                                   | 10     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 2.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Properties                                                                                                                                                  | 10     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 3.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Legal Proceedings                                                                                                                                           | 11     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 4.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | (Removed and Reserved)                                                                                                                                      | 11     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Part II                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 5.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Market for Registrant's Common Equity, Related                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | Stockholder Matters and Issuer Purchases of Equity Securities                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | 12     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 6.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Selected Financial Data                                                                                                                                     | 13     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 7.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Management's Discussion and Analysis of                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | Financial Condition and Results of Operations                                                                                                                                   | 14     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 7A.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Quantitative and Qualitative Disclosures About Market Risk                                                                                                  | 16     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 8.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Financial Statements and Supplementary Data                                                                                                                 | 17     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 9.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   | Changes in and Disagreements with Accountants                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | on Accounting and Financial Disclosure                                                                                                                                          | 30     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 9A.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Controls and Procedures                                                                                                                                     | 30     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 9B.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Other Information                                                                                                                                           | 31     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Part III                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 10.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Directors, Executive Officers and Corporate Governance                                                                                                      | 32     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 11.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Executive Compensation                                                                                                                                      | 32     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 12.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Security Ownership of Certain Beneficial Owners and Management and                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | Related Stockholder Matters                                                                                                                                                     | 33     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 13.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Certain Relationships and Related Transactions, and Director Independence                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | 33     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 14.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Principal Accounting Fees and Services                                                                                                                      | 33     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Part IV                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Item 15.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  | Exhibits and Financial Statement Schedules                                                                                                                  | 34     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Glossary of Oil and Gas Terms                                                                                                                   | 35                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |
| Signatures                                                                                                                                      | 37                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |

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| ·   | amends the definition of proved reserves to require the use of average commodity prices based upon the prior 12 month period rather than year-end prices; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | expands the type of technologies available to establish reserve estimates and categories; |
|--------------------|-------------------------------------------------------------------------------------------|

| ·   | modifies certain definitions used in estimating proved reserves; |
|--------------------|------------------------------------------------------------------|

| ·   | permits disclosure of probable and possible reserves; and |
|--------------------|-----------------------------------------------------------|

| ·   | permits disclosure of reserves based on different price and cost criteria, such as futures prices or management forecasts. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------|

|                               |   | Proved Developed |    |   | Proved       |   |   | Total       |   |
|------------------------------------|--------|------------------|---------|--------|--------------|--------|--------|-------------|--------|
|                               |   | Producing        |    |   | Nonproducing |   |   | Undeveloped |   |   | Proved |   |
| Oil (Bbls)                         |   |             | 422,000 |   |         |   | -      |        |   |   | 6,000 |   |   |   | 428,000 |   |
| Gas (Mcf)                          |   |             | 270,000 |   |         |   | -      |        |   |   | 18,000 |   |   |   | 288,000 |   |
| Total (BOE)                        |   |             | 467,000 |   |         |   | -      |        |   |   | 9,000 |   |   |   | 476,000 |   |
|                               |   |             |    |   |         |   |   |        |   |   |   |   |   |   |   |   |
| Standardized measure of discounted |   |             |    |   |         |   |   |        |   |   |   |   |   |   |   |   |
| future net cash flows              |   |             |    |   |         |   |   |        |   |   |   |   |   | $ | 8,013,000 |   |

|   |
|--------|

----

|    |   | Proved Reserves |    |   |   |   |
|---------|--------|-----------------|---------|--------|--------|--------|
|    |   |            |    |   |   |   |   | Total Oil |   |   | Percent of |   |
|    |   | Oil             |    |   | Gas    |   |   | Equivalent |   |   | Total Oil |   |
|    |   | (Bbls)          |    |   | (Mcf)  |   |   | (BOE) |   |   | Equivalent |   |
| Block D |   |            | 257,000 |   |   |   | - |   |   |   | 257,000 |   |   |   | 54 | % |
| Scott   |   |            | 55,000  |   |   |   | 125,000 |   |   |   | 76,000 |   |   |   | 16 | % |
| Collie  |   |            | 56,000  |   |   |   | 67,000 |   |   |   | 67,000 |   |   |   | 14 | % |
| Other   |   |            | 60,000  |   |   |   | 96,000 |   |   |   | 76,000 |   |   |   | 16 | % |
| Total   |   |            | 428,000 |   |   |   | 288,000 |   |   |   | 476,000 |   |   |   | 100 | % |

Item 

Item 

|   |
|--------|

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| Item 5. | Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities |
|---------|--------------------------------------------------------------------------------------------------------------|

|           |   | Total Number |   |   |          |   |
|----------------|--------|--------------|--------|--------|---------------|--------|
|           |   | of Units     |   |   | Average Price |   |
| Period         |   | Purchased    |   |   | Paid Per Unit |   |
| January 2010   |   |         | -      |   |          | $      | - |   |
| February 2010  |   |         | -      |   |          |   | - |   |
| March 2010     |   |         | -      |   |          |   | - |   |
| April 2010     |   |         | -      |   |          |   | - |   |
| May 2010       |   |         | -      |   |          |   | - |   |
| June 2010      |   |         | 85.0   |   |          |   | 241.51 |   |
| July 2010      |   |         | -      |   |          |   | - |   |
| August 2010    |   |         | -      |   |          |   | - |   |
| September 2010 |   |         | 65.0   |   |          |   | 226.31 |   |
| October 2010   |   |         | -      |   |          |   | - |   |
| November 2010  |   |         | -      |   |          |   | - |   |
| December 2010  |   |         | -      |   |          |   | - |   |
| TOTALS         |   |         | 150.0  |   |          | $      | 234.92 |   |

|   |
|--------|

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Item 

|                                  |   | Years ended December 31, |      |
|---------------------------------------|--------|--------------------------|-----------|
|                                  |   | 2010                     |      |   | 2009 |   |   | 2008 |   |   | 2007 |   |   | 2006 |   |
| Revenues                              |   | $                        | 3,108,349 |   |   | $ | 2,213,790 |   |   | $ | 4,181,145 |   |   | $ | 2,963,475 |   |   | $ | 2,761,552 |   |
|                                  |   |                     |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Net income                            |   |                     | 1,578,122 |   |   |   | 736,301 |   |   |   | 2,494,176 |   |   |   | 1,707,720 |   |   |   | 1,605,829 |   |
|                                  |   |                     |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Partners' share of net income :       |   |                     |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                  |   |                     |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| General partner                       |   |                     | 161,619   |   |   |   | 77,429 |   |   |   | 252,125 |   |   |   | 173,545 |   |   |   | 162,196 |   |
|                                  |   |                     |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Limited partners                      |   |                     | 1,416,503 |   |   |   | 658,872 |   |   |   | 2,242,051 |   |   |   | 1,534,175 |   |   |   | 1,443,633 |   |
|                                  |   |                     |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Limited partners' net income per unit |   |                     | 104.19    |   |   |   | 48.46 |   |   |   | 164.91 |   |   |   | 112.84 |   |   |   | 106.18 |   |
|                                  |   |                     |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Limited partners' cash                |   |                     |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| distributions per unit                |   |                     | 91.68     |   |   |   | 38.39 |   |   |   | 189.98 |   |   |   | 109.22 |   |   |   | 114.19 |   |
|                                  |   |                     |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Total assets                          |   | $                        | 1,115,080 |   |   | $ | 844,683 |   |   | $ | 648,997 |   |   | $ | 1,069,131 |   |   | $ | 897,695 |   |

|   |
|--------|

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Item 

|   |
|--------|

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|                                      |   | Year Ended December 31, |      |
|-------------------------------------------|--------|-------------------------|-----------|
|                                      |   | 2010                    |      |   | 2009 |   |   | 2008 |   |
| Oil production in barrels                 |   |                    | 38,211    |   |   |   | 35,869 |   |   |   | 38,210 |   |
| Gas production in mcf                     |   |                    | 39,864    |   |   |   | 36,476 |   |   |   | 43,192 |   |
| Total (BOE)                               |   |                    | 44,855    |   |   |   | 41,948 |   |   |   | 45,409 |   |
| Average price per barrel of oil           |   | $                       | 75.03     |   |   | $ | 57.17 |   |   | $ | 98.70 |   |
| Average price per mcf of gas              |   | $                       | 6.05      |   |   | $ | 4.47 |   |   | $ | 9.44 |   |
| Partnership distributions                 |   | $                       | 1,385,000 |   |   | $ | 580,000 |   |   | $ | 2,870,000 |   |
| Limited partner distributions             |   | $                       | 1,246,500 |   |   | $ | 522,000 |   |   | $ | 2,583,000 |   |
| Per unit distribution to limited partners |   | $                       | 91.68     |   |   | $ | 38.39 |   |   | $ | 189.98 |   |
| Number of limited partner units           |   |                    | 13,596    |   |   |   | 13,596 |   |   |   | 13,596 |   |

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|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |   | Page   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------|
| Report of Independent Registered Public Accounting Firm                                                                                                    |   | 18     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |   |
| Balance Sheets                                                                                                                                             |   | 19     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |   |
| Statements of Operations                                                                                                                                   |   | 20     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |   |
| Statements of Changes in Partners' Equity (Deficit)                                                                                                        |   | 21     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |   |
| Statements of Cash Flows                                                                                                                                   |   | 22     |
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |   |
| Notes to Financial Statements                                                                                                                              |   | 23     |

|   |
|--------|

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Report 

|   |
|--------|

----

Southwest 

|                                     |   | December 31, |      |
|------------------------------------------|--------|--------------|-----------|
|                                     |   | 2010         |      |   | 2009 |   |
|                                     |   |         |      |   |   |   |
| Assets                                   |   |         |      |   |   |   |
| Current assets:                          |   |         |      |   |   |   |
| Cash and cash equivalents                |   | $            | 103,359   |   |   | $ | 90,333 |   |
| Receivable from Managing General Partner |   |         | 450,390   |   |   |   | 165,430 |   |
| Total current assets                     |   |         | 553,749   |   |   |   | 255,763 |   |
|                                     |   |         |      |   |   |   |   |   |
| Oil and gas properties - using the full- |   |         |      |   |   |   |   |   |
| cost method of accounting                |   |         | 5,786,667 |   |   |   | 5,776,190 |   |
| Less accumulated depreciation,           |   |         |      |   |   |   |   |   |
| depletion and amortization               |   |         | 5,225,336 |   |   |   | 5,187,270 |   |
|                                     |   |         |      |   |   |   |   |   |
| Net oil and gas properties               |   |         | 561,331   |   |   |   | 588,920 |   |
|                                     |   | $            | 1,115,080 |   |   | $ | 844,683 |   |
|                                     |   |         |      |   |   |   |   |   |
| Liabilities and Partners' Equity         |   |         |      |   |   |   |   |   |
|                                     |   |         |      |   |   |   |   |   |
| Asset retirement obligation              |   | $            | 736,555   |   |   | $ | 659,280 |   |
|                                     |   |         |      |   |   |   |   |   |
| Partners' equity:                        |   |         |      |   |   |   |   |   |
| General partner                          |   |         | 27,237    |   |   |   | 4,118 |   |
| Limited partners                         |   |         | 351,288   |   |   |   | 181,285 |   |
|                                     |   |         |      |   |   |   |   |   |
| Total partners' equity                   |   |         | 378,525   |   |   |   | 185,403 |   |
|                                     |   |         |      |   |   |   |   |   |
|                                     |   | $            | 1,115,080 |   |   | $ | 844,683 |   |

|   |
|--------|

----

Southwest 

|                                     |   | Years ended December 31, |      |
|------------------------------------------|--------|--------------------------|-----------|
|                                     |   | 2010                     |      |   | 2009 |   |   | 2008 |   |
| Revenues                                 |   |                     |      |   |   |   |   |   |   |
| Oil and gas revenue                      |   | $                        | 3,107,848 |   |   | $ | 2,213,534 |   |   | $ | 4,178,787 |   |
| Interest income                          |   |                     | 501       |   |   |   | 256 |   |   |   | 2,358 |   |
|                                     |   |                     | 3,108,349 |   |   |   | 2,213,790 |   |   |   | 4,181,145 |   |
|                                     |   |                     |      |   |   |   |   |   |   |   |   |   |
| Expenses                                 |   |                     |      |   |   |   |   |   |   |   |   |   |
| Production                               |   |                     | 1,319,188 |   |   |   | 1,260,045 |   |   |   | 1,490,609 |   |
| Depreciation, depletion and amortization |   |                     | 38,066    |   |   |   | 37,991 |   |   |   | 27,073 |   |
| Accretion expense                        |   |                     | 47,053    |   |   |   | 54,078 |   |   |   | 44,825 |   |
| General and administrative               |   |                     | 125,920   |   |   |   | 125,375 |   |   |   | 124,462 |   |
|                                     |   |                     | 1,530,227 |   |   |   | 1,477,489 |   |   |   | 1,686,969 |   |
|                                     |   |                     |      |   |   |   |   |   |   |   |   |   |
| Net income                               |   | $                        | 1,578,122 |   |   | $ | 736,301 |   |   | $ | 2,494,176 |   |
|                                     |   |                     |      |   |   |   |   |   |   |   |   |   |
| Net income allocated to:                 |   |                     |      |   |   |   |   |   |   |   |   |   |
|                                     |   |                     |      |   |   |   |   |   |   |   |   |   |
| Managing General Partner                 |   | $                        | 161,619   |   |   | $ | 77,429 |   |   | $ | 252,125 |   |
|                                     |   |                     |      |   |   |   |   |   |   |   |   |   |
| Limited partners                         |   | $                        | 1,416,503 |   |   | $ | 658,872 |   |   | $ | 2,242,051 |   |
|                                     |   |                     |      |   |   |   |   |   |   |   |   |   |
| Per limited partner unit                 |   | $                        | 104.19    |   |   | $ | 48.46 |   |   | $ | 164.91 |   |
|                                     |   |                     |      |   |   |   |   |   |   |   |   |   |

|   |
|--------|

----

Southwest 

|                         |   | General |     |   | Limited  |   |       |   |   |
|------------------------------|--------|---------|----------|--------|----------|--------|------------|--------|--------|
|                         |   | Partner |     |   | Partners |   |       | Total  |   |
| Balance at December 31, 2007 |   | $       | 19,564   |   |     | $      | 385,362    |   |   | $ | 404,926 |   |
|                         |   |    |     |   |     |   |       |   |   |   |   |   |
| Net income                   |   |    | 252,125  |   |     |   | 2,242,051  |   |   |   | 2,494,176 |   |
|                         |   |    |     |   |     |   |       |   |   |   |   |   |
| Distributions                |   |    | (287,000 | )      |     |   | (2,583,000 | )      |   |   | (2,870,000 | ) |
|                         |   |    |     |   |     |   |       |   |   |   |   |   |
| Balance at December 31, 2008 |   |    | (15,311  | )      |     |   | 44,413     |   |   |   | 29,102 |   |
|                         |   |    |     |   |     |   |       |   |   |   |   |   |
| Net income                   |   |    | 77,429   |   |     |   | 658,872    |   |   |   | 736,301 |   |
|                         |   |    |     |   |     |   |       |   |   |   |   |   |
| Distributions                |   |    | (58,000  | )      |     |   | (522,000   | )      |   |   | (580,000 | ) |
|                         |   |    |     |   |     |   |       |   |   |   |   |   |
| Balance at December 31, 2009 |   |    | 4,118    |   |     |   | 181,285    |   |   |   | 185,403 |   |
|                         |   |    |     |   |     |   |       |   |   |   |   |   |
| Net income                   |   |    | 161,619  |   |     |   | 1,416,503  |   |   |   | 1,578,122 |   |
|                         |   |    |     |   |     |   |       |   |   |   |   |   |
| Distributions                |   |    | (138,500 | )      |     |   | (1,246,500 | )      |   |   | (1,385,000 | ) |
|                         |   |    |     |   |     |   |       |   |   |   |   |   |
| Balance at December 31, 2010 |   | $       | 27,237   |   |     | $      | 351,288    |   |   | $ | 378,525 |   |

|   |
|--------|

----

Southwest 

|                                                  |   | Years ended December 31, |       |
|-------------------------------------------------------|--------|--------------------------|------------|
|                                                  |   | 2010                     |       |   | 2009 |   |   | 2008 |   |
| Cash flows from operating activities:                 |   |                     |       |   |   |   |   |   |   |
| Cash received from oil and gas sales                  |   | $                        | 2,822,888  |   |   | $ | 2,048,104 |   |   | $ | 4,524,062 |   |
| Cash paid to suppliers                                |   |                     | (1,445,108 | ) |   |   | (1,449,961 | ) |   |   | (1,571,568 | ) |
| Interest received                                     |   |                     | 501        |   |   |   | 256 |   |   |   | 2,358 |   |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Net cash provided by operating activities             |   |                     | 1,378,281  |   |   |   | 598,399 |   |   |   | 2,954,852 |   |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Cash flows used in investing activities:              |   |                     |       |   |   |   |   |   |   |   |   |   |
| Proceeds from oil and gas                             |   |                     | 19,745     |   |   |   | - |   |   |   | - |   |
| Additions to oil and gas properties                   |   |                     | -          |   |   |   | (34,050 | ) |   |   | (91,735 | ) |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Net cash provided by (used in) investing activities   |   |                     | 19,745     |   |   |   | (34,050 | ) |   |   | (91,735 | ) |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Cash flows used in financing activities:              |   |                     |       |   |   |   |   |   |   |   |   |   |
| Distributions to partners                             |   |                     | (1,385,000 | ) |   |   | (580,000 | ) |   |   | (2,870,000 | ) |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Net increase (decrease) in cash and cash equivalents  |   |                     | 13,026     |   |   |   | (15,651 | ) |   |   | (6,883 | ) |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Beginning of year                                     |   |                     | 90,333     |   |   |   | 105,984 |   |   |   | 112,867 |   |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| End of year                                           |   | $                        | 103,359    |   |   | $ | 90,333 |   |   | $ | 105,984 |   |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Reconciliation of net income to net                   |   |                     |       |   |   |   |   |   |   |   |   |   |
| cash provided by operating activities:                |   |                     |       |   |   |   |   |   |   |   |   |   |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Net income                                            |   | $                        | 1,578,122  |   |   | $ | 736,301 |   |   | $ | 2,494,176 |   |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Adjustments to reconcile net income to                |   |                     |       |   |   |   |   |   |   |   |   |   |
| net cash provided by operating activities:            |   |                     |       |   |   |   |   |   |   |   |   |   |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Depreciation, depletion and amortization              |   |                     | 38,066     |   |   |   | 37,991 |   |   |   | 27,073 |   |
| Accretion expense                                     |   |                     | 47,053     |   |   |   | 54,078 |   |   |   | 44,825 |   |
| Settlement of asset retirement obligations            |   |                     |       |   |   |   |   |   |   |   |   |   |
| for plugged and abandoned wells                       |   |                     | -          |   |   |   | (18,794 | ) |   |   | (2,244 | ) |
| (Increase) decrease in receivables                    |   |                     | (284,960   | ) |   |   | (165,430 | ) |   |   | 345,275 |   |
| (Decrease) increase in payables                       |   |                     | -          |   |   |   | (45,747 | ) |   |   | 45,747 |   |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Net cash provided by operating activities             |   | $                        | 1,378,281  |   |   | $ | 598,399 |   |   | $ | 2,954,852 |   |
|                                                  |   |                     |       |   |   |   |   |   |   |   |   |   |
| Noncash investing and financing activities:           |   |                     |       |   |   |   |   |   |   |   |   |   |
| Increase (decrease) in oil and gas properties – |   |                     |       |   |   |   |   |   |   |   |   |   |
| Asset retirement obligations                          |   | $                        | 30,222     |   |   | $ | 49,848 |   |   | $ | (132,638 | ) |

|   |
|--------|

----

Southwest 

| 1. | Organization |
|----|--------------|

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

|   | (1) | All organization costs in excess of 3% of initial capital contributions will be paid by the Managing General Partner and will be treated as a capital contribution.  The Partnership paid the Managing General Partner an amount equal to 3% of initial capital contributions for such organization costs. |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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

| 2. | Summary of Significant Accounting Policies |
|----|--------------------------------------------|

|   |
|--------|

----

| 2. | Summary of Significant Accounting Policies - continued |
|----|--------------------------------------------------------|

|   |
|--------|

----

| 2. | Summary of Significant Accounting Policies - continued |
|----|--------------------------------------------------------|

|                                                        |   | 2010   |    |   | 2009   |   |
|-------------------------------------------------------------|--------|--------|---------|--------|--------|--------|
| Beginning of year                                           |   | $      | 659,280 |   |   | $      | 574,148 |   |
| Additional abandonment obligations from new wells           |   |   | 274     |   |   |   | 440 |   |
| Reduction of obligations due to wells plugged and abandoned |   |   | -       |   |   |   | (18,794 | ) |
| Reduction of obligations due to farmout                     |   |   | (2,458  | )      |   |   | - |   |
| Accretion expense                                           |   |   | 47,053  |   |   |   | 54,078 |   |
| Revisions of previous estimates                             |   |   | 32,406  |   |   |   | 49,408 |   |
| End of year                                                 |   | $      | 736,555 |   |   | $      | 659,280 |   |

| 4. | Commitments and Contingent Liabilities |
|----|----------------------------------------|

|   |
|--------|

----

| 4. | Commitments and Contingent Liabilities - continued |
|----|----------------------------------------------------|

| 5. | Related Party Transactions |
|----|----------------------------|

|   |
|--------|

----

| 6. | Oil and Gas Reserves Information (unaudited) |
|----|----------------------------------------------|

| ·   | amends the definition of proved reserves to require the use of average commodity prices based upon the prior 12-month period rather than year-end prices; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | expands the type of technologies available to establish reserve estimates and categories; |
|--------------------|-------------------------------------------------------------------------------------------|

| ·   | modifies certain definitions used in estimating proved reserves; |
|--------------------|------------------------------------------------------------------|

| ·   | permits disclosure of probable and possible reserves; and |
|--------------------|-----------------------------------------------------------|

| ·   | permits disclosure of reserves based on different price and cost criteria, such as futures prices or management forecasts. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------|

|                                  |   | Oil (bbls) |     |   | Gas (mcf) |   |
|---------------------------------------|--------|------------|----------|--------|-----------|--------|
| Total Proved -                        |   |       |     |   |      |   |
| January 1, 2008                       |   |       | 638,000  |   |      |   | 401,000 |   |
|                                  |   |       |     |   |      |   |   |   |
| New discoveries and extensions        |   |       | 2,000    |   |      |   | 4,000 |   |
| Revisions of previous estimates       |   |       | (195,000 | )      |      |   | (36,000 | ) |
| Production from continuing operations |   |       | (38,000  | )      |      |   | (43,000 | ) |
|                                  |   |       |     |   |      |   |   |   |
| December 31, 2008                     |   |       | 407,000  |   |      |   | 326,000 |   |
|                                  |   |       |     |   |      |   |   |   |
| Revisions of previous estimates       |   |       | 4,000    |   |      |   | (67,000 | ) |
| Production from continuing operations |   |       | (36,000  | )      |      |   | (36,000 | ) |
|                                  |   |       |     |   |      |   |   |   |
| December 31, 2009                     |   |       | 375,000  |   |      |   | 223,000 |   |
|                                  |   |       |     |   |      |   |   |   |
| New discoveries and extensions        |   |       | 7,000    |   |      |   | 18,000 |   |
| Revisions of previous estimates       |   |       | 84,000   |   |      |   | 87,000 |   |
| Production from continuing operations |   |       | (38,000  | )      |      |   | (40,000 | ) |
|                                  |   |       |     |   |      |   |   |   |
| December 31, 2010                     |   |       | 428,000  |   |      |   | 288,000 |   |
|                                  |   |       |     |   |      |   |   |   |
| Proved developed reserves -           |   |       |     |   |      |   |   |   |
| December 31, 2008                     |   |       | 404,000  |   |      |   | 323,000 |   |
| December 31, 2009                     |   |       | 373,000  |   |      |   | 219,000 |   |
| December 31, 2010                     |   |       | 422,000  |   |      |   | 270,000 |   |

|   |
|--------|

----

| 6. | Oil and Gas Reserves Information (unaudited) - continued |
|----|----------------------------------------------------------|

|                                          |   | 2010   |       |   | 2009   |   |       | 2008   |   |
|-----------------------------------------------|--------|--------|------------|--------|--------|--------|------------|--------|--------|
| Future cash inflows                           |   | $      | 33,340,000 |   |   | $      | 21,636,000 |   |   | $ | 19,695,000 |   |
| Production, development and abandonment costs |   |   | 20,156,000 |   |   |   | 14,848,000 |   |   |   | 12,720,000 |   |
| Future net cash flows                         |   |   | 13,184,000 |   |   |   | 6,788,000  |   |   |   | 6,975,000 |   |
| 10% annual discount for estimated             |   |   |       |   |   |   |       |   |   |   |   |   |
| timing of cash flows                          |   |   | 5,171,000  |   |   |   | 2,339,000  |   |   |   | 2,801,000 |   |
| Standardized measure of discounted            |   |   |       |   |   |   |       |   |   |   |   |   |
| future net cash flows                         |   | $      | 8,013,000  |   |   | $      | 4,449,000  |   |   | $ | 4,174,000 |   |

|   |
|--------|

----

| 6. | Oil and Gas Reserves Information (unaudited) - continued |
|----|----------------------------------------------------------|

|                                                   |   | 2010   |       |   | 2009   |   |      | 2008   |   |
|--------------------------------------------------------|--------|--------|------------|--------|--------|--------|-----------|--------|--------|
| Sales of oil and gas produced, net of production costs |   | $      | (1,789,000 | )      |   | $      | (954,000  | )      |   | $ | (2,688,000 | ) |
| Changes in prices and production costs                 |   |   | 2,991,000  |   |   |   | 583,000   |   |   |   | (13,911,000 | ) |
| Extensions and discoveries and improved                |   |   |       |   |   |   |      |   |   |   |   |   |
| recovery net of future production and                  |   |   |       |   |   |   |      |   |   |   |   |   |
| development costs                                      |   |   | 323,000    |   |   |   | -         |   |   |   | 48,000 |   |
| Changes of production rates (timing) and others        |   |   | (40,000    | )      |   |   | 306,000   |   |   |   | 3,660,000 |   |
| Revisions of previous quantities estimates             |   |   | 1,634,000  |   |   |   | (77,000   | )      |   |   | (1,810,000 | ) |
| Accretion of discount                                  |   |   | 445,000    |   |   |   | 417,000   |   |   |   | 1,716,000 |   |
| Discounted future net cash flows -                     |   |   |       |   |   |   |      |   |   |   |   |   |
| Beginning of year                                      |   |   | 4,449,000  |   |   |   | 4,174,000 |   |   |   | 17,159,000 |   |
| End of year                                            |   | $      | 8,013,000  |   |   | $      | 4,449,000 |   |   | $ | 4,174,000 |   |

| 7. | Selected Quarterly Financial Results – (unaudited) |
|----|----------------------------------------------------------|

|                  |   | Quarters |    |
|-----------------------|--------|----------|---------|
|                  |   | First    |    |   | Second |   |   | Third |   |   | Fourth |   |
| 2010:                 |   |     |    |   |   |   |   |   |   |   |   |   |
| Total revenues        |   | $        | 681,946 |   |   | $ | 818,392 |   |   | $ | 656,769 |   |   | $ | 951,242 |   |
| Total expenses        |   |     | 338,264 |   |   |   | 443,725 |   |   |   | 401,357 |   |   |   | 346,881 |   |
| Net income            |   | $        | 343,682 |   |   | $ | 374,667 |   |   | $ | 255,412 |   |   | $ | 604,361 |   |
|                  |   |     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Net income per        |   |     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| limited partners unit |   | $        | 22.68   |   |   | $ | 24.72 |   |   | $ | 16.85 |   |   | $ | 39.94 |   |

|                                 |   | Quarters |    |
|--------------------------------------|--------|----------|---------|
|                                 |   | First    |    |   | Second |   |   | Third |   |   | Fourth |   |
| 2009:                                |   |     |    |   |   |   |   |   |   |   |   |   |
| Total revenues                       |   | $        | 369,506 |   |   | $ | 561,923 |   |   | $ | 579,941 |   |   | $ | 702,420 |   |
| Total expenses                       |   |     | 334,637 |   |   |   | 316,665 |   |   |   | 368,392 |   |   |   | 457,795 |   |
| Net income                           |   | $        | 34,869  |   |   | $ | 245,258 |   |   | $ | 211,549 |   |   | $ | 244,625 |   |
|                                 |   |     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Net income per limited partners unit |   | $        | 2.24    |   |   | $ | 16.17 |   |   | $ | 13.94 |   |   | $ | 16.11 |   |

|   |
|--------|

----

Item 

Item 

| ·   | management of the Managing General Partner has evaluated the effectiveness of the disclosure controls and procedures as of the end of the period covered by this report; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | this evaluation was conducted under the supervision and with the participation of management of the Managing General Partner, including the chief executive and chief financial officers of the Managing General Partner; and |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | it is the conclusion of chief executive and chief financial officers of the Managing General Partner that these disclosure controls and procedures are effective in ensuring that information that is required to be disclosed by the Partnership in reports filed or submitted with the SEC is recorded, processed, summarized and reported within the time periods specified in the rules and forms established by the SEC. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of management and our Board of Directors; and |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | provide reasonable assurance regarding prevention or timely detection of any unauthorized acquisition, use or disposition of our assets that could have a material effect on the financial statements. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   |
|--------|

----

Item 

|   |
|--------|

----

Item 

Item 

|   |
|--------|

----

Item 

Item 

Item 

| For the Year Ended December 31, |   | 2010   |   |   | 2009   |   |
|---------------------------------|--------|--------|--------|--------|--------|--------|
| Audit Fees                      |   | $      | 19,034 |   |   | $      | 17,163 |   |
| Audit Related Fees              |   |   | -      |   |   |   | - |   |
| Tax Fees                        |   |   | -      |   |   |   | - |   |
| All Other Fees                  |   |   | -      |   |   |   | - |   |
|                            |   |   |   |   |   |   |   |   |
| TOTAL                           |   | $      | 19,034 |   |   | $      | 17,163 |   |

|   |
|--------|

----

Item 

| (a)    | (1)    | Financial Statements:                                                                                                                                                                                |
|--------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |   |                                                                                                                                                                                                 |
|   |   | Included in Part II of this report                                                                                                                                                                   |
|   |   |                                                                                                                                                                                                 |
|   |   | Report of Independent Registered Public Accounting Firm                                                                                                                                              |
|   |   | Balance Sheets                                                                                                                                                                                       |
|   |   | Statements of Operations                                                                                                                                                                             |
|   |   | Statements of Changes in Partners' Equity (Deficit)                                                                                                                                                  |
|   |   | Statements of Cash Flows                                                                                                                                                                             |
|   |   | Notes to Financial Statements                                                                                                                                                                        |
|   |   |                                                                                                                                                                                                 |
|   | (2)    | Schedules required by Article 12 of Regulation S-X are either omitted because they are not applicable or because the required information is shown in the financial statements or the notes thereto. |
|   |   |                                                                                                                                                                                                 |
|   | (3)    | Exhibits:                                                                                                                                                                                            |

| 4      | (a)    | Certificate of Limited Partnership of Southwest Oil & Gas Income Fund VIII-A, L.P., dated November 30, 1987. (Incorporated by reference from Partnership's S-1 Registration Statement File Number 33-18847 effective March 31, 1988.) |
|--------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |   |                                                                                                                                                                                                                                      |
|   | (b)    | Agreement of Limited Partnership of Southwest Oil & Gas Income Fund VIII-A, L.P. dated July 6, 1988.  (Incorporated by reference from Partnership's Form 10-K for the fiscal year ended December 31, 1988.)                 |
|   |   |                                                                                                                                                                                                                                      |
|   |   |                                                                                                                                                                                                                                      |
|   | 31.1   | Rule 13a-14(a)/15d-14(a) Certification                                                                                                                                                                                                    |
|   | 31.2   | Rule 13a-14(a)/15d-14(a) Certification                                                                                                                                                                                                    |
|   | 32.1   | Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002                                                             |

|   |
|--------|

----

Glossary 

|   |
|--------|

----

|   |
|--------|

----

Signatures

|   | Southwest Oil & Gas Income Fund VIII-A, L.P., |
|--------|---------------------------------------------------|
|   | a Delaware limited partnership               |
|   |                                              |
| By:    | Southwest Royalties, Inc., Managing               |
|   | General Partner                                   |
|   |                                              |
|   |                                              |
| By:    | /s/ Mel G. Riggs                                  |
|   | Mel G. Riggs                                      |
|   | President and Chief Executive Officer             |
|   |                                              |
| Date:  | March 29, 2011                                    |

|                                                                                  |   |                                                                                  |
|---------------------------------------------------------------------------------------|--------|---------------------------------------------------------------------------------------|
| /s/ Clayton W Williams                                                                |   | /s/ Mel G. Riggs                                                                      |
| Clayton W. Williams, Chairman of the Board                                            |   | Mel G. Riggs, President, Chief Executive                                              |
| and a Director                                                                        |   | Officer and a Director                                                                |
|                                                                                  |   |                                                                                  |
| Date:           March 29, 2011 |   | Date:           March 29, 2011 |
|                                                                                  |   |                                                                                  |
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|                                                                                  |   |                                                                                  |
|                                                                                  |   |                                                                                  |
| /s/ Michael L. Pollard                                                                |   |                                                                                  |
| Michael L. Pollard, Senior Vice President                                             |   |                                                                                  |
| and Chief Financial Officer                                                           |   |                                                                                  |
|                                                                                  |   |                                                                                  |
| Date:           March 29, 2011 |   |                                                                                  |
|                                                                                  |   |                                                                                  |
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