SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report: October 15, 1998 Southwest Royalties Institutional Income Fund X-B, L.P. (Exact name of registrant as specified in its limited partnership agreement) Delaware 0-19601 75-2332174 (State or other jurisdiction Commission IRS Employer of incorporation) File Number Identification No. 407 N. Big Spring, Suite 300, Midland, Texas 79701 (Address of principal executive office) (Zip Code) Registrant's telephone number, including area code (915) 686-9927 None (Former name or former address, if changed since last report.) The total number of pages contained in this report is 9. Item 2. Acquisition or Disposition of Assets (a) On October 15, 1998, Southwest Royalties Institutional Income Fund X-B (the "Registrant") sold its interest in 35 oil and gas properties to Parks & Luttrell, Inc. ("Parks"), an unrelated party. The Registrant's interest in the properties was sold for net proceeds, after post closing adjustments, of $95,201. At December 31, 1997, the property sold to Parks contained proved reserves of 13,895 barrels of oil and 258,982 mcfs of gas and had a SEC 10 value of $254,948. The proceeds from the sale represented 8.70% of the Registrant's total assets. Item 7. Financial Statements and Exhibits (b) Pro Forma Financial Information The accompanying unaudited pro forma financial information of the Registrant is presented to reflect the sale of oil and gas properties on October 15, 1998. The unaudited pro forma balance sheet is presented as if the sale of the oil and gas properties occurred at the balance sheet date and the unaudited pro forma statements of operations are presented as if the sale of the properties occurred on January 1, 1997. (c) Exhibits None Unaudited Pro Forma Financial Statements The Unaudited Pro Forma Financial Statements have been prepared to give effect to the sale of oil and gas properties on October 15, 1998. The Unaudited Pro Forma Financial Statements of the Registrant are not necessarily indicative of the financial results for the periods presented had the sale of the properties taken place on January 1, 1997. In addition, future results may vary significantly from the results reflected in the accompanying Unaudited Pro Forma Financial Statements because of normal production declines and changes in product prices, among other factors. This information should be read in conjunction with the Financial Statements of the Registrant (and the related notes) included in the Annual Report on Form 10-K for the year ended December 31, 1997 and in the Quarterly Report on Form 10-Q for the nine months ended September 30, 1998. Southwest Royalties Institutional Income Fund X-B, L.P. Unaudited Pro Forma Balance Sheet As of September 30, 1998 Pro Forma Historical Entries Pro Forma ----------- -------------------- Assets Current assets Cash and cash equivalents $ 38,473 $95,201 (a)$133,674 Other receivable 167,650 167,650 --------- --------- 206,123 301,324 Total current assets --------- --------- Oil and gas properties - using the full cost method of accounting 4,016,945 (95,201)(a) 3,921,744 Less accumulated depreciation, depletion and amortization 3,005,196 3,005,196 --------- --------- Net oil and gas properties 1,011,749 916,548 --------- --------- $1,217,872 $1,217,872 ========= ========= Liabilities and Partners' Equity Current liability Distribution payable $ 50 $ 50 Payable to Managing General Partner103,682 103,682 --------- --------- Total current liabilities 103,732 103,732 --------- --------- Partners' equity General partners (39,224) (39,224) Limited partners 1,153,364 1,153,364 --------- --------- Total partners' equity 1,114,140 1,114,140 --------- --------- $1,217,872 $1,217,872 ========= ========= See accompanying notes to unaudited pro forma financial statements. Southwest Royalties Institutional Income Fund X-B, L.P. Unaudited Pro Forma Statement of Operations Nine months ended September 30, 1998 Assets Historical Sold Pro Forma ----------- -------------------- Revenues Income from net profits interests $ (31,967) $ (7,740)(b) $ (24,227) Interest 1,189 - 1,189 ------- ------ ------- (30,778) (7,740) (23,038) ------- ------ ------- Expenses General and administrative 71,241 - 71,241 Depreciation, depletion and amortization 101,000 (19,000)(c) 82,000 Provision for impairment of oil and gas properties 51,105 - 51,105 ------- ------ ------- 223,346 (19,000) 204,346 ------- ------ ------- Net loss $(254,124) $ 26,740 $ (227,384) ======= ====== ======= Net loss allocated to: Managing General Partner $ (9,182) $(8,485) ======= ======= General Partner $ (1,020) $ (943) ======= ======= Limited Partners $(243,922) $(217,956) ======= ======= Per limited partner unit $ (21.82) $ (19.49) ======= ======= See accompanying notes to unaudited pro forma financial statements Southwest Royalties Institutional Income Fund X-B, L.P. Unaudited Pro Forma Statement of Operations For the year ended December 31, 1997 Assets Historical Sold Pro Forma ----------- -------------------- Revenues Income from net profits interests $ 530,113$ (60,989)(b)$ 469,124 Interest 4,876 - 4,876 ------- ------- ------- 534,989 (60,989) 474,000 ------- ------- ------- Expenses General and administrative 80,881 - 80,881 Depreciation, depletion and Amortization 198,000 (27,000)(c) 171,000 ------- ------- ------- 278,881 (27,000) 251,881 ------- ------- ------- Net income $ 256,108 $(33,989) $ 222,119 ======= ======= ======= Net income allocated to: Managing General Partner $ 40,870 $ 35,381 ======= ======= General Partner $ 4,541 $ 3,931 ======= ======= Limited Partners $ 210,697 $182,807 ======= ======= Per limited partner unit $ 18.84 $ 16.35 ======= ======= See accompanying notes to unaudited pro forma financial statements Southwest Royalties Institutional Income Fund X-B, L.P. Notes to Unaudited Pro Forma Financial Statements December 31, 1997 and September 30, 1998 Note 1: Basis of Presentation The accompanying unaudited pro forma financial information of Southwest Royalties Institutional Income Fund X-B, L.P. (the "Registrant") is presented to reflect the sale of oil and gas properties to Parks & Luttrell, Inc. on October 15, 1998 (the "Assets Sold"). The unaudited pro forma balance sheet is presented as if the Assets Sold occurred at September 30, 1998 and the unaudited pro forma statements of operations are presented as if the sale of the Assets Sold occurred on January 1, 1997. Historical - Represents the Registrant's balance sheet as of September 30, 1998 and the Registrant's statements of operations for the nine months ended September 30, 1998 and the year ended December 31, 1997. Assets Sold - Reflects the results of operations for the nine months ended September 30, 1998 and the year ended December 31, 1997 from the oil and gas properties prior to the sale in 1998. Note 2: Pro Forma Entries (a) To record the sale of the Assets Sold as if such sale had occurred on September 30, 1998. The aggregate cash proceeds of $95,201 were initially utilized to increase cash and cash equivalents and will be partially distributed to the partners. (b) Reflects gross oil and gas sales net of lease operating cost and production taxes for the Assets Sold for the periods represented. (c)Depletion for the periods represented was calculated for the Assets Sold under the units of revenue method. Under the units of revenue method, depletion is computed on the basis of current gross revenues from production in relation to future gross revenues, based on current prices, from estimated production of proved oil and gas reserves. Note 3: Oil and Gas Information The following unaudited pro forma supplemental information regarding the oil and gas activities of the Registrant is presented pursuant to the disclosure requirements promulgated by the Securities and Exchange Commission and Statement of Financial Accounting Standard No. 69, "Disclosures About Oil and Gas Producing Activities". The pro forma combined reserve information is presented as if the sale of the Assets Sold had occurred on January 1, 1997. Information for oil is presented in barrels (bbls) and for gas in thousands of cubic feet (Mcf). The Registrant emphasizes that reserve estimates are inherently imprecise and subject to revision. Accordingly, the estimates are expected to change, as future information becomes available. Southwest Royalties Institutional Income Fund X-B, L.P. Notes to Unaudited Pro Forma Financial Statements December 31, 1997 and September 30, 1998 Note 3: Oil and Gas Information - continued Set forth below is a pro forma summary of the changes in the net quantities of oil and gas reserves for the year ended December 31, 1997. Oil (bbls) Gas (Mcf) ---------- --------- Net proved reserves at January 1, 1997704,000 833,000 Revisions of previous estimates (263,000) (141,000) Production (51,000) (68,000) Sales (5,000) (1,000) ------- --------- Net proved reserves at December 31, 1997385,000 623,000 ======= ========= The pro forma estimated present value of future net revenues of proved reserves, calculated using December 31, 1997 prices of $16.88 per barrel of oil and $2.25 per Mcf of gas, discounted at 10%, was approximately $1,736,817 at December 31, 1997. SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Partnership has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Southwest Royalties Institutional Income Fund X-B, L.P. By: Southwest Royalties, Inc. Managing General Partner By: /s/ Bill E. Coggin - ------------------------- Bill E. Coggin Vice President Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following person on behalf of the Partnership and in the capacity and on the date indicated. Date: December 16, 1998 /s/ Bill E. Coggin ---------------------------------- Bill E. Coggin, Vice President and Chief Financial Officer