----

| Delaware                                  |   | 75-2274632          |
|-------------------------------------------|--------|---------------------|
| (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 |
|---------------------------------------------------------------------------------------------------------|------------|------|

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|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | 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)                         |   |             | 60,000  |   |         |   | -      |        |   |   | 6,000 |   |   |   | 66,000 |   |
| Gas (Mcf)                          |   |             | 114,000 |   |         |   | -      |        |   |   | 49,000 |   |   |   | 163,000 |   |
| Total (BOE)                        |   |             | 79,000  |   |         |   | -      |        |   |   | 14,000 |   |   |   | 93,000 |   |
|                               |   |             |    |   |         |   |   |        |   |   |   |   |   |   |   |   |
| Standardized measure of discounted |   |             |    |   |         |   |   |        |   |   |   |   |   |   |   |   |
| future net cash flows              |   |             |    |   |         |   |   |        |   |   |   |   |   | $ | 1,480,000 |   |

----

|             |   | Proved Reserves |   |   |   |   |
|------------------|--------|-----------------|--------|--------|--------|--------|
|             |   |            |   |   |   |   |   | Total Oil |   |   | Percent of |   |
|             |   | Oil             |   |   | Gas    |   |   | Equivalent |   |   | Total Oil |   |
|             |   | (Bbls)          |   |   | (Mcf)  |   |   | (BOE) |   |   | Equivalent |   |
| Big Spring       |   |            | 27,000 |   |   |   | - |   |   |   | 27,000 |   |   |   | 29.0 | % |
| Cain             |   |            | 12,000 |   |   |   | - |   |   |   | 12,000 |   |   |   | 12.9 | % |
| Puckett East     |   |            | -      |   |   |   | 68,000 |   |   |   | 11,000 |   |   |   | 11.8 | % |
| Grayburg Jackson |   |            | 7,000  |   |   |   | 16,000 |   |   |   | 10,000 |   |   |   | 10.8 | % |
| Other            |   |            | 20,000 |   |   |   | 79,000 |   |   |   | 33,000 |   |   |   | 35.5 | % |
| Total            |   |            | 66,000 |   |   |   | 163,000 |   |   |   | 93,000 |   |   |   | 100.0 | % |

Item 

Item 

----

| 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      |   |         | 20.0   |   |          |   | 9.61 |   |
| July 2010      |   |         | -      |   |          |   | - |   |
| August 2010    |   |         | -      |   |          |   | - |   |
| September 2010 |   |         | 64.0   |   |          |   | 4.78 |   |
| October 2010   |   |         | -      |   |          |   | - |   |
| November 2010  |   |         | -      |   |          |   | - |   |
| December 2010  |   |         | -      |   |          |   | - |   |
| TOTALS         |   |         | 84.0   |   |          | $      | 5.93 |   |

----

Item 

|                                  |   | Years ended December 31, |    |
|---------------------------------------|--------|--------------------------|---------|
|                                  |   | 2010                     |    |   | 2009 |   |   | 2008 |   |   | 2007 |   |   | 2006 |   |
| Revenues                              |   | $                        | 740,774 |   |   | $ | 593,330 |   |   | $ | 1,403,900 |   |   | $ | 1,062,527 |   |   | $ | 1,121,603 |   |
|                                  |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Net income (loss)                     |   |                     | 14,079  |   |   |   | (12,011 | ) |   |   | 501,194 |   |   |   | 398,209 |   |   |   | 530,402 |   |
|                                  |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Partners' share of net income (loss): |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                  |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| General partners                      |   |                     | 7,197   |   |   |   | 5,723 |   |   |   | 54,359 |   |   |   | 42,981 |   |   |   | 55,231 |   |
|                                  |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Limited partners                      |   |                     | 6,882   |   |   |   | (17,734 | ) |   |   | 446,835 |   |   |   | 355,228 |   |   |   | 475,171 |   |
|                                  |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Limited partners'                     |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| net income (loss) per unit            |   |                     | .66     |   |   |   | (1.70 | ) |   |   | 42.75 |   |   |   | 33.98 |   |   |   | 45.46 |   |
|                                  |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Limited partners' cash                |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| distributions per unit                |   |                     | 5.71    |   |   |   | 8.13 |   |   |   | 47.31 |   |   |   | 34.56 |   |   |   | 49.53 |   |
|                                  |   |                     |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Total assets                          |   | $                        | 554,239 |   |   | $ | 637,728 |   |   | $ | 674,626 |   |   | $ | 673,033 |   |   | $ | 690,704 |   |

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Item 

----

|                                      |   | Year Ended December 31, |   |
|-------------------------------------------|--------|-------------------------|--------|
|                                      |   | 2010                    |   |   | 2009 |   |   | 2008 |   |
| Oil production in barrels                 |   |                    | 7,425  |   |   |   | 8,268 |   |   |   | 11,238 |   |
| Gas production in mcf                     |   |                    | 29,705 |   |   |   | 31,415 |   |   |   | 32,220 |   |
| Total (BOE)                               |   |                    | 12,376 |   |   |   | 13,504 |   |   |   | 16,608 |   |
| Average price per barrel of oil           |   | $                       | 77.73  |   |   | $ | 55.88 |   |   | $ | 99.39 |   |
| Average price per mcf of gas              |   | $                       | 5.50   |   |   | $ | 4.18 |   |   | $ | 8.89 |   |
| Partnership distributions                 |   | $                       | 66,332 |   |   | $ | 94,174 |   |   | $ | 549,428 |   |
| Limited partner distributions             |   | $                       | 59,693 |   |   | $ | 85,013 |   |   | $ | 494,515 |   |
| Per unit distribution to limited partners |   | $                       | 5.71   |   |   | $ | 8.13 |   |   | $ | 47.31 |   |
| Number of limited partner units           |   |                    | 10,453 |   |   |   | 10,453 |   |   |   | 10,453 |   |

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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  |

----

Report 

----

Southwest 

|                                       |   | December 31, |      |
|--------------------------------------------|--------|--------------|-----------|
|                                       |   | 2010         |      |   | 2009 |   |
|                                       |   |         |      |   |   |   |
| Assets                                     |   |         |      |   |   |   |
|                                       |   |         |      |   |   |   |
| Current assets:                            |   |         |      |   |   |   |
| Cash and cash equivalents                  |   | $            | 90,141    |   |   | $ | 36,383 |   |
| Receivable from Managing General Partner   |   |         | 4,853     |   |   |   | 30,368 |   |
| New Mexico income tax deposits             |   |         | 15,997    |   |   |   | 13,295 |   |
|                                       |   |         |      |   |   |   |   |   |
| Total current assets                       |   |         | 110,991   |   |   |   | 80,046 |   |
|                                       |   |         |      |   |   |   |   |   |
| Oil and gas properties - using the full-   |   |         |      |   |   |   |   |   |
| cost method of accounting                  |   |         | 3,491,011 |   |   |   | 3,547,552 |   |
| Less accumulated depreciation,             |   |         |      |   |   |   |   |   |
| depletion and amortization                 |   |         | 3,047,763 |   |   |   | 2,989,870 |   |
|                                       |   |         |      |   |   |   |   |   |
| Net oil and gas properties                 |   |         | 443,248   |   |   |   | 557,682 |   |
|                                       |   | $            | 554,239   |   |   | $ | 637,728 |   |
|                                       |   |         |      |   |   |   |   |   |
| Liabilities and Partners' Equity (Deficit) |   |         |      |   |   |   |   |   |
|                                       |   |         |      |   |   |   |   |   |
| Asset retirement obligation                |   | $            | 514,332   |   |   | $ | 545,568 |   |
|                                       |   |         |      |   |   |   |   |   |
| Partners' equity (deficit):                |   |         |      |   |   |   |   |   |
| General partners                           |   |         | (66,280   | ) |   |   | (66,838 | ) |
| Limited partners                           |   |         | 106,187   |   |   |   | 158,998 |   |
|                                       |   |         |      |   |   |   |   |   |
| Total partners' equity                     |   |         | 39,907    |   |   |   | 92,160 |   |
|                                       |   |         |      |   |   |   |   |   |
|                                       |   | $            | 554,239   |   |   | $ | 637,728 |   |

----

Southwest 

|                                     |   | Years ended December 31, |    |
|------------------------------------------|--------|--------------------------|---------|
|                                     |   | 2010                     |    |   | 2009 |   |   | 2008 |   |
| Revenues                                 |   |                     |    |   |   |   |   |   |   |
|                                     |   |                     |    |   |   |   |   |   |   |
| Oil and gas                              |   | $                        | 740,698 |   |   | $ | 593,267 |   |   | $ | 1,403,395 |   |
| Interest income                          |   |                     | 76      |   |   |   | 63 |   |   |   | 505 |   |
|                                     |   |                     | 740,774 |   |   |   | 593,330 |   |   |   | 1,403,900 |   |
| Expenses                                 |   |                     |    |   |   |   |   |   |   |   |   |   |
|                                     |   |                     |    |   |   |   |   |   |   |   |   |   |
| Production                               |   |                     | 536,890 |   |   |   | 391,814 |   |   |   | 729,191 |   |
| Depreciation, depletion and amortization |   |                     | 57,893  |   |   |   | 69,244 |   |   |   | 42,395 |   |
| Accretion expense                        |   |                     | 31,756  |   |   |   | 43,933 |   |   |   | 31,575 |   |
| General and administrative               |   |                     | 100,156 |   |   |   | 100,350 |   |   |   | 99,545 |   |
|                                     |   |                     | 726,695 |   |   |   | 605,341 |   |   |   | 902,706 |   |
|                                     |   |                     |    |   |   |   |   |   |   |   |   |   |
| Net income (loss)                        |   | $                        | 14,079  |   |   | $ | (12,011 | ) |   | $ | 501,194 |   |
|                                     |   |                     |    |   |   |   |   |   |   |   |   |   |
| Net income (loss) allocated to:          |   |                     |    |   |   |   |   |   |   |   |   |   |
| Managing General Partner                 |   | $                        | 6,477   |   |   | $ | 5,151 |   |   | $ | 48,923 |   |
|                                     |   |                     |    |   |   |   |   |   |   |   |   |   |
| General Partner                          |   | $                        | 720     |   |   | $ | 572 |   |   | $ | 5,436 |   |
|                                     |   |                     |    |   |   |   |   |   |   |   |   |   |
| Limited partners                         |   | $                        | 6,882   |   |   | $ | (17,734 | ) |   | $ | 446,835 |   |
|                                     |   |                     |    |   |   |   |   |   |   |   |   |   |
| Per limited partner unit                 |   | $                        | .66     |   |   | $ | (1.70 | ) |   | $ | 42.75 |   |

----

Southwest 

|                         |   | General  |    |   | Limited  |   |     |   |   |
|------------------------------|--------|----------|---------|--------|----------|--------|----------|--------|--------|
|                         |   | Partners |    |   | Partners |   |     | Total  |   |
| Balance at December 31, 2007 |   | $        | (62,846 | )      |     | $      | 309,425  |   |   | $ | 246,579 |   |
|                         |   |     |    |   |     |   |     |   |   |   |   |   |
| Net income                   |   |     | 54,359  |   |     |   | 446,835  |   |   |   | 501,194 |   |
|                         |   |     |    |   |     |   |     |   |   |   |   |   |
| Distributions                |   |     | (54,913 | )      |     |   | (494,515 | )      |   |   | (549,428 | ) |
|                         |   |     |    |   |     |   |     |   |   |   |   |   |
| Balance at December 31, 2008 |   |     | (63,400 | )      |     |   | 261,745  |   |   |   | 198,345 |   |
|                         |   |     |    |   |     |   |     |   |   |   |   |   |
| Net income (loss)            |   |     | 5,723   |   |     |   | (17,734  | )      |   |   | (12,011 | ) |
|                         |   |     |    |   |     |   |     |   |   |   |   |   |
| Distributions                |   |     | (9,161  | )      |     |   | (85,013  | )      |   |   | (94,174 | ) |
|                         |   |     |    |   |     |   |     |   |   |   |   |   |
| Balance at December 31, 2009 |   |     | (66,838 | )      |     |   | 158,998  |   |   |   | 92,160 |   |
|                         |   |     |    |   |     |   |     |   |   |   |   |   |
| Net income                   |   |     | 7,197   |   |     |   | 6,882    |   |   |   | 14,079 |   |
|                         |   |     |    |   |     |   |     |   |   |   |   |   |
| Distributions                |   |     | (6,639  | )      |     |   | (59,693  | )      |   |   | (66,332 | ) |
|                         |   |     |    |   |     |   |     |   |   |   |   |   |
| Balance at December 31, 2010 |   | $        | (66,280 | )      |     | $      | 106,187  |   |   | $ | 39,907 |   |

----

Southwest 

|                                                  |   | Years ended December 31, |     |
|-------------------------------------------------------|--------|--------------------------|----------|
|                                                  |   | 2010                     |     |   | 2009 |   |   | 2008 |   |
| Cash flows from operating activities:                 |   |                     |     |   |   |   |   |   |   |
|                                                  |   |                     |     |   |   |   |   |   |   |
| Cash received from oil and gas sales                  |   | $                        | 763,511  |   |   | $ | 577,215 |   |   | $ | 1,400,760 |   |
| Cash paid to suppliers                                |   |                     | (674,084 | ) |   |   | (512,535 | ) |   |   | (813,553 | ) |
| Interest received                                     |   |                     | 76       |   |   |   | 63 |   |   |   | 505 |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Net cash provided by operating activities             |   |                     | 89,503   |   |   |   | 64,743 |   |   |   | 587,712 |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Cash flows from investing activities:                 |   |                     |     |   |   |   |   |   |   |   |   |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Additions to oil and gas properties                   |   |                     | -        |   |   |   | (42,040 | ) |   |   | (40,521 | ) |
| Proceeds from oil and gas properties                  |   |                     | 30,587   |   |   |   | 44,159 |   |   |   | - |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Net cash provided by (used in) investing activities   |   |                     | 30,587   |   |   |   | 2,119 |   |   |   | (40,521 | ) |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Cash flows used in financing activities:              |   |                     |     |   |   |   |   |   |   |   |   |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Distributions to partners                             |   |                     | (66,332  | ) |   |   | (94,174 | ) |   |   | (549,428 | ) |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Net increase (decrease) in cash and cash equivalents  |   |                     | 53,758   |   |   |   | (27,312 | ) |   |   | (2,237 | ) |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Beginning of year                                     |   |                     | 36,383   |   |   |   | 63,695 |   |   |   | 65,932 |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| End of year                                           |   | $                        | 90,141   |   |   | $ | 36,383 |   |   | $ | 63,695 |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Reconciliation of net income (loss) to net cash       |   |                     |     |   |   |   |   |   |   |   |   |   |
| provided by operating activities:                     |   |                     |     |   |   |   |   |   |   |   |   |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Net income (loss)                                     |   | $                        | 14,079   |   |   | $ | (12,011 | ) |   | $ | 501,194 |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Adjustments to reconcile net income (loss) to net     |   |                     |     |   |   |   |   |   |   |   |   |   |
| cash provided by operating activities:                |   |                     |     |   |   |   |   |   |   |   |   |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Depreciation, depletion and amortization              |   |                     | 57,893   |   |   |   | 69,244 |   |   |   | 42,395 |   |
| Settlement of asset retirement obligations            |   |                     |     |   |   |   |   |   |   |   |   |   |
| for plugged and abandoned wells                       |   |                     | (37,038  | ) |   |   | - |   |   |   | (5,188 | ) |
| Accretion expense                                     |   |                     | 31,756   |   |   |   | 43,933 |   |   |   | 31,575 |   |
| Decrease (increase) in receivables and deposits       |   |                     | 22,813   |   |   |   | (16,052 | ) |   |   | (2,635 | ) |
| (Decrease) increase in payables                       |   |                     | -        |   |   |   | (20,371 | ) |   |   | 20,371 |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Net cash provided by operating activities             |   | $                        | 89,503   |   |   | $ | 64,743 |   |   | $ | 587,712 |   |
|                                                  |   |                     |     |   |   |   |   |   |   |   |   |   |
| Noncash investing and financing activities:           |   |                     |     |   |   |   |   |   |   |   |   |   |
| (Decrease) increase in oil and gas properties – |   |                     |     |   |   |   |   |   |   |   |   |   |
| Asset retirement obligations                          |   | $                        | (25,954  | ) |   | $ | 45,725 |   |   | $ | 3,069 |   |

----

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%     |   | -        |
| 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 |
|----|--------------------------------------------------------|

----

|                                                        |   | 2010   |    |   | 2009   |   |
|-------------------------------------------------------------|--------|--------|---------|--------|--------|--------|
| Beginning of year                                           |   | $      | 545,568 |   |   | $      | 455,910 |   |
| Reduction of obligations due to wells plugged and abandoned |   |   | (37,038 | )      |   |   | - |   |
| Reduction of obligations due to farm-outs                   |   |   | -       |   |   |   | (507 | ) |
| Accretion expense                                           |   |   | 31,756  |   |   |   | 43,933 |   |
| Revisions of previous estimates                             |   |   | (25,954 | )      |   |   | 46,232 |   |
| End of year                                                 |   | $      | 514,332 |   |   | $      | 545,568 |   |

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

----

| 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. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------|

----

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

|                            |   | Oil (bbls) |    |   | Gas (mcf) |   |
|---------------------------------|--------|------------|---------|--------|-----------|--------|
| Total Proved -                  |   |       |    |   |      |   |
|                            |   |       |    |   |      |   |
| January 1, 2008                 |   |       | 164,000 |   |      |   | 300,000 |   |
|                            |   |       |    |   |      |   |   |   |
| Revisions of previous estimates |   |       | (83,000 | )      |      |   | (15,000 | ) |
| Production                      |   |       | (11,000 | )      |      |   | (32,000 | ) |
| December 31, 2008               |   |       | 70,000  |   |      |   | 253,000 |   |
|                            |   |       |    |   |      |   |   |   |
| Revisions of previous estimates |   |       | (36,000 | )      |      |   | (62,000 | ) |
| Production                      |   |       | (8,000  | )      |      |   | (31,000 | ) |
| December 31, 2009               |   |       | 26,000  |   |      |   | 160,000 |   |
|                            |   |       |    |   |      |   |   |   |
| New discoveries and extensions  |   |       | 6,000   |   |      |   | 49,000 |   |
| Revisions of previous estimates |   |       | 41,000  |   |      |   | (16,000 | ) |
| Production                      |   |       | (7,000  | )      |      |   | (30,000 | ) |
| December 31, 2010               |   |       | 66,000  |   |      |   | 163,000 |   |
|                            |   |       |    |   |      |   |   |   |
| Proved developed reserves -     |   |       |    |   |      |   |   |   |
| December 31, 2008               |   |       | 63,000  |   |      |   | 203,000 |   |
| December 31, 2009               |   |       | 26,000  |   |      |   | 160,000 |   |
| December 31, 2010               |   |       | 60,000  |   |      |   | 114,000 |   |

----

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

|   | The standardized measure of discounted future net cash flows relating to proved oil and gas reserves at December 31, 2010, 2009 and 2008 is presented below: |
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                                          |   | 2010   |      |   | 2009   |   |      | 2008   |   |
|-----------------------------------------------|--------|--------|-----------|--------|--------|--------|-----------|--------|--------|
| Future cash inflows                           |   | $      | 5,851,000 |   |   | $      | 2,039,000 |   |   | $ | 4,638,000 |   |
| Production, development and abandonment costs |   |   | 3,355,000 |   |   |   | 1,649,000 |   |   |   | 2,701,000 |   |
| Future net cash flows                         |   |   | 2,496,000 |   |   |   | 390,000   |   |   |   | 1,937,000 |   |
| 10% annual discount for estimated             |   |   |      |   |   |   |      |   |   |   |   |   |
| timing of cash flows                          |   |   | 1,016,000 |   |   |   | 45,000    |   |   |   | 708,000 |   |
| Standardized measure of discounted            |   |   |      |   |   |   |      |   |   |   |   |   |
| future net cash flows                         |   | $      | 1,480,000 |   |   | $      | 345,000   |   |   | $ | 1,229,000 |   |

|   | Changes in the standardized measure of discounted future net cash flows relating to proved reserves for the years ended December 31, 2010, 2009 and 2008 are as follows: |
|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                                                   |   | 2010   |      |   | 2009   |   |      | 2008   |   |
|--------------------------------------------------------|--------|--------|-----------|--------|--------|--------|-----------|--------|--------|
| Sales of oil and gas produced, net of production costs |   | $      | (204,000  | )      |   | $      | (201,000  | )      |   | $ | (674,000 | ) |
| Extension and discoveries                              |   |   | 251,000   |   |   |   | -         |   |   |   | - |   |
| Changes in prices and production costs                 |   |   | 551,000   |   |   |   | (823,000  | )      |   |   | (3,995,000 | ) |
| Changes of production rates (timing) and others        |   |   | (95,000   | )      |   |   | 320,000   |   |   |   | 990,000 |   |
| Revisions of previous quantities estimates             |   |   | 597,000   |   |   |   | (303,000  | )      |   |   | (937,000 | ) |
| Accretion of discount                                  |   |   | 35,000    |   |   |   | 123,000   |   |   |   | 531,000 |   |
| Discounted future net cash flows -                     |   |   |      |   |   |   |      |   |   |   |   |   |
| Beginning of year                                      |   |   | 345,000   |   |   |   | 1,229,000 |   |   |   | 5,314,000 |   |
| End of year                                            |   | $      | 1,480,000 |   |   |   | 345,000   |   |   | $ | 1,229,000 |   |

----

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

|                          |   | Quarter |    |
|-------------------------------|--------|---------|---------|
|                          |   | First   |    |   | Second |   |   | Third |   |   | Fourth |   |
| 2010:                         |   |    |    |   |   |   |   |   |   |   |   |   |
| Total revenues                |   | $       | 210,588 |   |   | $ | 186,299 |   |   | $ | 174,069 |   |   | $ | 169,818 |   |
| Total expenses                |   |    | 213,096 |   |   |   | 225,238 |   |   |   | 147,499 |   |   |   | 140,862 |   |
| Net income (loss)             |   | $       | (2,508  | ) |   | $ | (38,939 | ) |   | $ | 26,570 |   |   | $ | 28,956 |   |
|                          |   |    |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Net income (loss) per limited |   |    |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| partners unit                 |   | $       | (.39    | ) |   | $ | (3.51 | ) |   | $ | 2.16 |   |   | $ | 2.40 |   |

|                  |   | Quarter |    |
|-----------------------|--------|---------|---------|
|                  |   | First   |    |   | Second |   |   | Third |   |   | Fourth |   |
| 2009:                 |   |    |    |   |   |   |   |   |   |   |   |   |
| Total revenues        |   | $       | 114,270 |   |   | $ | 139,197 |   |   | $ | 147,060 |   |   | $ | 192,803 |   |
| Total expenses        |   |    | 132,259 |   |   |   | 138,915 |   |   |   | 166,112 |   |   |   | 168,055 |   |
| Net (loss) income     |   | $       | (17,989 | ) |   | $ | 282 |   |   | $ | (19,052 | ) |   | $ | 24,748 |   |
|                  |   |    |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Net (loss) income per |   |    |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| limited partners unit |   | $       | (1.70   | ) |   | $ | (.10 | ) |   | $ | (1.77 | ) |   | $ | 1.87 |   |

----

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 IX-A, L.P., dated March 9, 1989.  (Incorporated by reference from Partnership's Form 10-K for the fiscal year ended December 31, 1989.)              |
|--------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |   |                                                                                                                                                                                                                                     |
|   | (b)    | Agreement of Limited Partnership of Southwest Oil & Gas Income Fund IX-A, L.P. dated October 25, 1989.  (Incorporated by reference from Partnership's Form 10-K for the fiscal year ended December 31, 1987.)              |
|   |   |                                                                                                                                                                                                                                     |
|   | (c)    | Certificate of Amendment of Limited Partnership of Southwest Oil & Gas Income Fund IX-A, L.P., dated July 21, 1987.  (Incorporated by reference from Partnership's Form 10-K for the fiscal year ended December 31, 1987.) |
|   |   |                                                                                                                                                                                                                                     |
|   | 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 IX-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 |
|                                                                                  |   |                                                                                  |
|                                                                                  |   |                                                                                  |
|                                                                                  |   |                                                                                  |
|                                                                                  |   |                                                                                  |
| /s/ Michael L. Pollard                                                                |   |                                                                                  |
| Michael L. Pollard, Senior Vice President                                             |   |                                                                                  |
| and Chief Financial Officer                                                           |   |                                                                                  |
|                                                                                  |   |                                                                                  |
| Date:           March 29, 2011 |   |                                                                                  |
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