SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarter ended September 30, 2006 Commission File Number: I-D: 0-15831 I-E: 0-15832 I-F: 0-15833 GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-D GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-E GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-F -------------------------------------------------------- (Exact name of Registrant as specified in its Articles) I-D 73-1265223 I-E 73-1270110 Oklahoma I-F 73-1292669 - ---------------------------- ------------------------------- (State or other jurisdiction (I.R.S. Employer Identification of incorporation or Number) organization) Two West Second Street, Tulsa, Oklahoma 74103 ------------------------------------------------------------ (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code:(918) 583-1791 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. Yes X No ------ ------ -1- Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of "accelerated filer and large accelerated filer" in Rule 12b-2 of the Exchange Act (check one): Large accelerated filer -------- Accelerated filer -------- X Non-accelerated filer -------- Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes No X ------ ------ The Depositary Units are not publicly traded; therefore, Registrant cannot compute the aggregate market value of the voting units held by non-affiliates of the Registrant. -2- PART I. FINANCIAL INFORMATION ITEM 1. FINANCIAL STATEMENTS GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-D GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-D COMBINED BALANCE SHEETS (Unaudited) ASSETS September 30, December 31, 2006 2005 ------------- ------------ CURRENT ASSETS: Cash and cash equivalents $ 265,602 $ 311,844 Accounts receivable: Oil and gas sales 107,157 310,780 Assets held for sale (Note 3) 277,083 - ---------- ---------- Total current assets $ 649,842 $ 622,624 NET OIL AND GAS PROPERTIES, utilizing the successful efforts method 211,077 392,810 DEFERRED CHARGE 71,634 77,179 ---------- ---------- $ 932,553 $1,092,613 ========== ========== LIABILITIES AND PARTNERS' CAPITAL (DEFICIT) CURRENT LIABILITIES: Accounts payable $ 14,733 $ 33,313 Gas imbalance payable 32,097 32,967 Asset retirement obligation - current (Note 1) 1,506 1,556 Asset retirement obligation - assets held for sale 26,396 - Accounts payable of assets held for sale 7,677 - ---------- ---------- Total current liabilities $ 82,409 $ 67,836 LONG-TERM LIABILITIES: Accrued liability $ 24,254 $ 25,062 Asset retirement obligation (Note 1) 31,833 56,812 ---------- ---------- Total long-term liabilities $ 56,087 $ 81,874 PARTNERS' CAPITAL (DEFICIT): General Partner ($ 11,384) $ 6,023 Limited Partners, issued and outstanding, 7,195 units 805,441 936,880 ---------- ---------- Total Partners' capital $ 794,057 $ 942,903 ---------- ---------- $ 932,553 $1,092,613 ========== ========== The accompanying condensed notes are an integral part of these combined financial statements. -3- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-D GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-D COMBINED STATEMENTS OF OPERATIONS FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2006 AND 2005 (Unaudited) 2006 2005 -------- -------- REVENUES: Oil and gas sales $163,339 $184,815 Interest income 2,232 1,352 -------- -------- $165,571 $186,167 COSTS AND EXPENSES: Lease operating $ 17,114 $ 14,020 Production tax 10,250 12,112 Depreciation, depletion, and amortization of oil and gas properties 4,722 7,574 Impairment provision 2,535 - General and administrative (Note 2) 21,584 22,023 -------- -------- $ 56,205 $ 55,729 -------- -------- INCOME FROM CONTINUING OPERATIONS $109,366 $130,438 Income from discontinued operations (Note 3) 105,211 101,625 -------- -------- NET INCOME $214,577 $232,063 ======== ======== GENERAL PARTNER: Net income from continuing operations $ 17,086 $ 20,424 Net income from discontinued operations 16,066 16,474 Net income 33,152 36,898 LIMITED PARTNERS: Net income from continuing operations $ 92,280 $110,014 Net income from discontinued operations 89,145 85,151 Net income 181,425 195,165 NET INCOME FROM CONTINUING OPERATIONS PER UNIT $ 12.83 $ 15.29 NET INCOME FROM DISCONTINUED OPERATIONS PER UNIT 12.39 11.83 NET INCOME PER UNIT 25.22 27.12 UNITS OUTSTANDING 7,195 7,195 The accompanying condensed notes are an integral part of these combined financial statements. -4- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-D GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-D COMBINED STATEMENTS OF OPERATIONS FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2006 AND 2005 (Unaudited) 2006 2005 -------- -------- REVENUES: Oil and gas sales $462,130 $517,603 Interest income 7,535 3,325 -------- -------- $469,665 $520,928 COSTS AND EXPENSES: Lease operating $ 49,562 $ 50,017 Production tax 31,510 35,879 Depreciation, depletion, and amortization of oil and gas properties 12,063 15,000 Impairment provision 2,535 - General and administrative (Note 2) 89,051 87,762 -------- -------- $184,721 $188,658 -------- -------- INCOME FROM CONTINUING OPERATIONS $284,944 $332,270 Income from discontinued operations (Note 3) 292,049 273,421 -------- -------- NET INCOME $576,993 $605,691 ======== ======== GENERAL PARTNER: Net income from continuing operations $ 43,655 $ 51,442 Net income from discontinued operations 44,777 43,680 Net income 88,432 95,122 LIMITED PARTNERS: Net income from continuing operations $241,289 $280,828 Net income from discontinued operations 247,272 229,741 Net income 488,561 510,569 NET INCOME FROM CONTINUING OPERATIONS $ 33.54 $ 39.03 PER UNIT NET INCOME FROM DISCONTINUED OPERATIONS PER UNIT 34.37 31.93 NET INCOME PER UNIT 67.91 70.96 UNITS OUTSTANDING 7,195 7,195 The accompanying condensed notes are an integral part of these combined financial statements. -5- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-D GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-D COMBINED STATEMENTS OF CASH FLOWS FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2006 AND 2005 (Unaudited) 2006 2005 ---------- ---------- CASH FLOWS FROM OPERATING ACTIVITIES: Net income $576,993 $605,691 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation, depletion, and amortization of oil and gas properties 17,250 34,052 Impairment provision 4,272 - Settlement of asset retirement obligation ( 545) ( 36) (Increase) decrease in accounts receivable - oil and gas sales 103,751 ( 109,320) Decrease in deferred charge 5,545 4,442 Increase (decrease) in accounts payable ( 10,645) 8,497 Increase in accounts payable - related party (Note 2) - 1,642 Increase (decrease) in gas imbalance payable ( 870) 18 Decrease in accrued liability ( 808) ( 4,997) -------- -------- Net cash provided by operating activities $694,943 $539,989 -------- -------- CASH FLOWS FROM INVESTING ACTIVITIES: Capital expenditures ($ 17,382) ($ 23,944) Proceeds from sale of oil and gas properties 2,036 2,798 -------- -------- Net cash used by investing activities ($ 15,346) ($ 21,146) -------- -------- CASH FLOWS FROM FINANCING ACTIVITIES: Cash distributions ($725,839) ($506,367) -------- -------- Net cash used by financing activities ($725,839) ($506,367) -------- -------- NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS ($ 46,242) $ 12,476 CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 311,844 250,839 -------- -------- CASH AND CASH EQUIVALENTS AT END OF PERIOD $265,602 $263,315 ======== ======== The accompanying condensed notes are an integral part of these combined financial statements. -6- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-E GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-E COMBINED BALANCE SHEETS (Unaudited) ASSETS September 30, December 31, 2006 2005 ------------- ------------ CURRENT ASSETS: Cash and cash equivalents $1,860,898 $1,838,920 Accounts receivable: Oil and gas sales 682,219 1,921,870 Assets held for sale (Note 3) 1,526,190 - ---------- ---------- Total current assets $4,069,307 $3,760,790 NET OIL AND GAS PROPERTIES, utilizing the successful efforts method 1,486,834 2,469,064 DEFERRED CHARGE 371,475 394,160 ---------- ---------- $5,927,616 $6,624,014 ========== ========== LIABILITIES AND PARTNERS' CAPITAL (DEFICIT) CURRENT LIABILITIES: Accounts payable $ 289,004 $ 350,149 Gas imbalance payable 109,226 112,023 Asset retirement obligation - current (Note 1) 14,220 96,761 Assets retirement obligation - assets held for sale 213,055 - Accounts payable of assets held for sale 83,838 - ---------- ---------- Total current liabilities $ 709,343 $ 558,933 LONG-TERM LIABILITIES: Accrued liability $ 118,444 $ 122,896 Asset retirement obligation (Note 1) 541,632 744,174 ---------- ---------- Total long-term liabilities $ 660,076 $ 867,070 PARTNERS' CAPITAL (DEFICIT): General Partner ($ 10,361) $ 89,828 Limited Partners, issued and outstanding, 41,839 units 4,568,558 5,108,183 ---------- ---------- Total Partners' capital $4,558,197 $5,198,011 ---------- ---------- $5,927,616 $6,624,014 ========== ========== The accompanying condensed notes are an integral part of these combined financial statements. -7- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-E GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-E COMBINED STATEMENTS OF OPERATIONS FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2006 AND 2005 (Unaudited) 2006 2005 ---------- ---------- REVENUES: Oil and gas sales $1,096,141 $1,204,729 Interest income 14,574 8,356 Other income 2,775 - ---------- ---------- $1,113,490 $1,213,085 COSTS AND EXPENSES: Lease operating $ 27,313 $ 166,622 Production tax 62,315 71,557 Depreciation, depletion, and amortization of oil and gas properties 48,702 80,679 Impairment provision 42,554 - General and administrative (Note 2) 120,352 121,651 ---------- ---------- $ 301,236 $ 440,509 ---------- ---------- INCOME FROM CONTINUING OPERATIONS $ 812,254 $ 772,576 Income from discontinued operations (Note 3) 615,010 656,921 ---------- ---------- NET INCOME $1,427,264 $1,429,497 ========== ========== GENERAL PARTNER: Net income from continuing operations $ 132,428 $ 125,928 Net income from discontinued operations 93,594 106,567 Net income 226,022 232,495 LIMITED PARTNERS: Net income from continuing operations $ 679,826 $ 646,648 Net income from discontinued operations 521,416 550,354 Net income 1,201,242 1,197,002 NET INCOME FROM CONTINUING OPERATIONS PER UNIT $ 16.24 $ 15.46 NET INCOME FROM DISCONTINUED OPERATIONS PER UNIT 12.46 13.16 NET INCOME PER UNIT 28.70 28.62 UNITS OUTSTANDING 41,839 41,839 The accompanying condensed notes are an integral part of these combined financial statements. -8- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-E GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-E COMBINED STATEMENTS OF OPERATIONS FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2006 AND 2005 (Unaudited) 2006 2005 ---------- ---------- REVENUES: Oil and gas sales $3,172,574 $3,276,077 Interest income 46,046 21,244 Other income 2,775 - ---------- ---------- $3,221,395 $3,297,321 COSTS AND EXPENSES: Lease operating $ 459,862 $ 421,920 Production tax 193,117 203,659 Depreciation, depletion, and amortization of oil and gas properties 126,362 129,239 Impairment provision 42,554 - General and administrative (Note 2) 388,581 387,898 ---------- ---------- $1,210,476 $1,142,716 ---------- ---------- INCOME FROM CONTINUING OPERATIONS $2,010,919 $2,154,605 Income from discontinued operations (Note 3) 1,733,253 1,776,673 ---------- ---------- NET INCOME $3,744,172 $3,931,278 ========== ========== GENERAL PARTNER: Net income from continuing operations $ 318,379 $ 338,098 Net income from discontinued operations 265,418 280,581 Net income 583,797 618,679 LIMITED PARTNERS: Net income from continuing operations $1,692,540 $1,816,507 Net income from discontinued operations 1,467,835 1,496,092 Net income 3,160,375 3,312,599 NET INCOME FROM CONTINUING OPERATIONS PER UNIT $ 40.45 $ 43.42 NET INCOME FROM DISCONTINUED OPERATIONS PER UNIT 35.08 35.76 NET INCOME PER UNIT 75.53 79.18 UNITS OUTSTANDING 41,839 41,839 The accompanying condensed notes are an integral part of these combined financial statements. -9- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-E GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-E COMBINED STATEMENTS OF CASH FLOWS FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2006 AND 2005 (Unaudited) 2006 2005 ------------ ------------ CASH FLOWS FROM OPERATING ACTIVITIES: Net income $3,744,172 $3,931,278 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation, depletion, and amortization of oil and gas properties 157,819 229,811 Impairment provision 49,880 - Settlement of asset retirement obligation ( 94,354) ( 272) (Increase) decrease in accounts receivable - oil and gas sales 616,967 ( 733,201) Decrease in accounts receivable - related party (Note 2) - ( 1,490) Decrease in deferred charge 22,685 26,442 Increase (decrease) in accounts payable 13,484 ( 5,437) Decrease in accrued liability - other - ( 88,892) Decrease in gas imbalance payable ( 2,797) ( 4,196) Decrease in accrued liability ( 4,452) ( 28,846) ---------- ---------- Net cash provided by operating activities $4,503,404 $3,325,197 ---------- ---------- CASH FLOWS FROM INVESTING ACTIVITIES: Capital expenditures ($ 97,440) ($ 123,387) Proceeds from the sale of oil and gas properties - 8,993 ---------- ---------- Net cash used by investing activities ($ 97,440) ($ 114,394) ---------- ---------- CASH FLOWS FROM FINANCING ACTIVITIES: Cash distributions ($4,383,986) ($3,260,118) ---------- ---------- Net cash used by financing activities ($4,383,986) ($3,260,118) ---------- ---------- -10- NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS $ 21,978 ($ 49,135) CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 1,838,920 1,579,268 ---------- ---------- CASH AND CASH EQUIVALENTS AT END OF PERIOD $1,860,898 $1,529,953 ========== ========== The accompanying condensed notes are an integral part of these combined financial statements. -11- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-F GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-F COMBINED BALANCE SHEETS (Unaudited) ASSETS September 30, December 31, 2006 2005 ------------ ------------ CURRENT ASSETS: Cash and cash equivalents $ 665,677 $ 684,976 Accounts receivable: Oil and gas sales 289,564 544,225 Assets held for sale (Note 3) 463,017 - ---------- ---------- Total current assets $1,418,258 $1,229,201 NET OIL AND GAS PROPERTIES, utilizing the successful efforts method 593,465 967,086 DEFERRED CHARGE 287,766 302,265 ---------- ---------- $2,299,489 $2,498,552 ========== ========== LIABILITIES AND PARTNERS' CAPITAL CURRENT LIABILITIES: Accounts payable $ 162,137 $ 118,863 Gas imbalance payable 35,181 36,173 Asset retirement obligation - current (Note 1) 5,603 65,890 Asset retirement obligation - assets held for sale 114,761 - Accounts payable of assets held for sale 47,816 - ---------- ---------- Total current liabilities $ 365,498 $ 220,926 LONG-TERM LIABILITIES: Accrued liability $ 110,257 $ 114,225 Asset retirement obligation (Note 1) 217,018 328,418 ---------- ---------- Total long-term liabilities $ 327,275 $ 442,643 PARTNERS' CAPITAL: General Partner $ 13,904 $ 46,741 Limited Partners, issued and outstanding, 14,321 units 1,592,812 1,788,242 ---------- ---------- Total Partners' capital $1,606,716 $1,834,983 ---------- ---------- $2,299,489 $2,498,552 ========== ========== The accompanying condensed notes are an integral part of these combined financial statements. -12- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-F GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-F COMBINED STATEMENTS OF OPERATIONS FOR THE THREE MONTHS ENDED SEPTEMBER 30, 2006 AND 2005 (Unaudited) 2006 2005 -------- -------- REVENUES: Oil and gas sales $474,453 $534,840 Interest income 4,996 2,894 Other income 1,942 - -------- -------- $481,391 $537,734 COSTS AND EXPENSES: Lease operating $ 53,345 $ 73,241 Production tax 28,099 32,404 Depreciation, depletion, and amortization of oil and gas properties 20,727 38,641 Impairment provision 20,617 - General and administrative (Note 2) 41,899 42,517 -------- -------- $164,687 $186,803 -------- -------- INCOME FROM CONTINUING OPERATIONS $316,704 $350,931 Income from discontinued operations (Note 3) 113,473 131,578 -------- -------- NET INCOME $430,177 $482,509 ======== ======== GENERAL PARTNER: Net income from continuing operations $ 52,545 $ 57,615 Net income from discontinued operations 17,680 23,146 Net income 70,225 80,761 LIMITED PARTNERS: Net income from continuing operations $264,159 $293,316 Net income from discontinued operations 95,793 108,432 Net income 359,952 401,748 NET INCOME FROM CONTINUING OPERATIONS PER UNIT $ 18.45 $ 20.48 NET INCOME FROM DISCONTINUED OPERATIONS PER UNIT 6.69 7.58 NET INCOME PER UNIT 25.14 28.06 UNITS OUTSTANDING 14,321 14,321 The accompanying condensed notes are an integral part of these combined financial statements. -13- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-F GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-F COMBINED STATEMENTS OF OPERATIONS FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2006 AND 2005 (Unaudited) 2006 2005 ---------- ---------- REVENUES: Oil and gas sales $1,362,870 $1,396,681 Interest income 15,640 7,377 Other income 1,942 - ---------- ---------- $1,380,452 $1,404,058 COSTS AND EXPENSES: Lease operating $ 251,157 $ 168,651 Production tax 85,123 88,668 Depreciation, depletion, and amortization of oil and gas properties 50,273 58,785 Impairment provision 20,617 - General and administrative (Note 2) 150,667 149,502 ---------- ---------- $ 557,837 $ 465,606 ---------- ---------- INCOME FROM CONTINUING OPERATIONS $ 822,615 $ 938,452 Income from discontinued operations (Note 3) 318,943 349,077 ---------- ---------- NET INCOME $1,141,558 $1,287,529 ========== ========== GENERAL PARTNER: Net income from continuing operations $ 130,971 $ 147,891 Net income from discontinued operations 50,017 57,712 Net income 180,988 205,603 LIMITED PARTNERS: Net income from continuing operations $ 691,644 $ 790,561 Net income from discontinued operations 268,926 291,365 Net income 960,570 1,081,926 NET INCOME FROM CONTINUING OPERATIONS PER UNIT $ 48.30 $ 55.20 NET INCOME FROM DISCONTINUED OPERATIONS PER UNIT 18.78 20.35 NET INCOME PER UNIT 67.08 75.55 UNITS OUTSTANDING 14,321 14,321 The accompanying condensed notes are an integral part of these combined financial statements. -14- GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-F GEODYNE ENERGY INCOME PRODUCTION PARTNERSHIP I-F COMBINED STATEMENTS OF CASH FLOWS FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2006 AND 2005 (Unaudited) 2006 2005 ------------ ------------ CASH FLOWS FROM OPERATING ACTIVITIES: Net income $1,141,558 $1,287,529 Adjustments to reconcile net income to net cash provided by operating activities: Depreciation, depletion, and amortization of oil and gas properties 62,296 97,004 Impairment provision 24,131 - Settlement of asset retirement obligation ( 64,368) ( 136) (Increase) decrease in accounts receivable - oil and gas sale 139,918 ( 218,206) Decrease in deferred charge 14,499 22,204 Increase in accounts payable 84,824 7,599 Decrease in accrued liability - other - ( 62,225) Increase (decrease) in gas imbalance payable ( 992) 276 Decrease in accrued liability ( 3,968) ( 21,229) ---------- ---------- Net cash provided by operating activities $1,397,898 $1,112,816 ---------- ---------- CASH FLOWS FROM INVESTING ACTIVITIES: Capital expenditures ($ 47,372) ($ 57,613) Proceeds from sale of oil and gas properties - 3,093 ---------- ---------- Net cash used by investing activities ($ 47,372) ($ 54,520) ---------- ---------- CASH FLOWS FROM FINANCING ACTIVITIES: Cash distributions ($1,369,825) ($1,067,140) ---------- ---------- Net cash used by financing activities ($1,369,825) ($1,067,140) ---------- ---------- NET DECREASE IN CASH AND CASH EQUIVALENTS ($ 19,299) ($ 8,844) CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD 684,976 552,399 ---------- ---------- CASH AND CASH EQUIVALENTS AT END OF PERIOD $ 665,677 $ 543,555 ========== ========== The accompanying condensed notes are an integral part of these combined financial statements. -15- GEODYNE ENERGY INCOME PROGRAM I LIMITED PARTNERSHIPS CONDENSED NOTES TO THE COMBINED FINANCIAL STATEMENTS SEPTEMBER 30, 2006 (Unaudited) 1. ACCOUNTING POLICIES ------------------- The combined balance sheets as of September 30, 2006, combined statements of operations for the three and nine months ended September 30, 2006 and 2005, and combined statements of cash flows for the nine months ended September 30, 2006 and 2005 have been prepared by Geodyne Resources, Inc., the General Partner of the limited partnerships, without audit. Each limited partnership is a general partner in the related Geodyne Energy Income Production Partnership in which Geodyne Resources, Inc. serves as the managing partner. Unless the context indicates otherwise, all references to a "Partnership" or the "Partnerships" are references to the limited partnership and its related production partnership, collectively, and all references to the "General Partner" are references to the general partner of the limited partnerships and the managing partner of the production partnerships, collectively. In the opinion of management the financial statements referred to above include all necessary adjustments, consisting of normal recurring adjustments, to present fairly the combined financial position at September 30, 2006, the combined results of operations for the three and nine months ended September 30, 2006 and 2005, and the combined cash flows for the nine months ended September 30, 2006 and 2005. Information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted. The accompanying interim financial statements should be read in conjunction with the Partnerships' Annual Report on Form 10-K filed for the year ended December 31, 2005. The results of operations for the period ended September 30, 2006 are not necessarily indicative of the results to be expected for the full year. The Limited Partners' net income or loss per unit is based upon each $1,000 initial capital contribution. STATEMENTS OF CASH FLOWS ----------------------- Cash flows from operating, investing and financing activities presented in the Statements of Cash Flows include cash flows attributable to discontinued operations and assets held for sale for all periods presented. -16- NEW ACCOUNTING PRONOUNCEMENTS ----------------------------- In September 2006, the FASB issued FAS No. 157, "Fair Value Measurements" (FAS No. 157). FAS No. 157 establishes a common definition for fair value to be applied to US GAAP guidance requiring use of fair value, establishes a framework for measuring fair value, and expands the disclosure about such fair value measurements. FAS No. 157 is effective for fiscal years beginning after November 5, 2007. The Partnerships are currently assessing the impact of FAS No.157 on its results of operations, financial condition and cash flows. In September 2006, the SEC staff issued Staff Accounting Bulletin (SAB) Topic 108, "Financial Statements - Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements" (SAB 108). The SEC staff is providing guidance on how prior year misstatements should be taken into consideration when quantifying misstatements in current year financial statements for purposes of determining whether the current year's financial statements are materially misstated and should be restated. SAB 108 is effective for fiscal years ending after November 18, 2006, and early application is encouraged. The Partnerships do not believe SAB 108 will have a material impact on its results of operations, financial condition and cash flows. DISCONTINUED OPERATIONS ----------------------- As further discussed in Note 3, the Partnerships sold their interests in a number of producing properties to independent third parties at the Oil and Gas Clearinghouse auction in Houston, Texas on October 11, 2006. It is anticipated that additional properties will be sold at auction in December 2006 and February 2007. The following chart shows the number of properties anticipated to be sold under the plan and their associated proved reserves as of September 30, 2006. Number of Proved Partnership Properties Reserves ----------- --------------- -------------- I-D 41 $1,680,000 I-E 58 9,414,000 I-F 44 2,769,000 RECLASSIFICATION ---------------- Certain prior year balances have been reclassified to conform with current year presentation. -17- OIL AND GAS PROPERTIES ---------------------- The Partnerships follow the successful efforts method of accounting for their oil and gas properties. Under the successful efforts method, the Partnerships capitalize all property acquisition costs and development costs incurred in connection with the further development of oil and gas reserves. Property acquisition costs include costs incurred by the Partnerships or the General Partner to acquire producing properties, including related title insurance or examination costs, commissions, engineering, legal and accounting fees, and similar costs directly related to the acquisitions, plus an allocated portion of the General Partner's property screening costs. The acquisition cost to the Partnerships of properties acquired by the General Partner is adjusted to reflect the net cash results of operations, including interest incurred to finance the acquisition, for the period of time the properties are held by the General Partner. Depletion of the costs of producing oil and gas properties, amortization of related intangible drilling and development costs, and depreciation of tangible lease and well equipment are computed on the unit-of-production method. The Partnerships' depletion, depreciation, and amortization includes estimated dismantlement and abandonment costs and estimated salvage value of the equipment. When complete units of depreciable property are retired or sold, the asset cost and related accumulated depreciation are eliminated with any gain or loss (including the elimination of the asset retirement obligation) reflected in income. When less than complete units of depreciable property are retired or sold, the proceeds are credited to oil and gas properties. The Partnerships evaluate the recoverability of the carrying costs of their proved oil and gas properties for each well. If the unamortized costs, net of salvage value, of oil and gas properties exceeds the expected undiscounted future cash flows for such properties, the cost of the properties is written down to fair value, which is determined by using the estimated discounted future cash flows from the properties. In the third quarter of 2006, natural gas prices declined significantly. Consequently, the partnerships incurred impairments utilizing the natural gas spot prices that existed on September 30, 2006. The impairments recognized in the third quarter totaled $3,000, $43,000 and $21,000 for the I-D, I-E and I-F Partnerships, respectively. Since oil and natural gas prices remain volatile, the partnerships may be required to write down the carrying value of its oil and natural gas properties at the end of future reporting periods. If an impairment is required, it would result in a charge to earnings but would not impact cash flow from operating activities. Once incurred, an impairment of oil and natural gas properties is not reversible. -18- ASSET RETIREMENT OBLIGATIONS ---------------------------- The Partnerships' wells must be properly plugged and abandoned after their oil and gas reserves are exhausted. The Partnerships follow FAS No. 143, "Accounting for Asset Retirement Obligations" in accounting for the future expenditures that will be necessary to plug and abandon these wells. FAS No. 143 requires the estimated plugging and abandonment obligations to be (i) recognized in the period in which they are incurred (i.e. when the well is drilled or acquired) if a reasonable estimate of fair value can be made and (ii) capitalized as part of the carrying amount of the well. Estimated abandonment dates will be revised based on changes to related economic lives, which vary with product prices and production costs. Estimated plugging costs may also be adjusted to reflect changing industry experience. During the year ended December 31, 2005, the Partnerships' asset retirement obligations were revised upward due to increases in both labor and rig costs associated with plugging wells. Cash flows will not be affected until wells are actually plugged and abandoned. The asset retirement obligation is adjusted upwards each quarter in order to recognize accretion of the time-related discount factor. For the nine months ended September 30, 2006, the I-D, I-E, and I-F Partnerships recognized $3,000, $58,000, and $25,000, respectively, of an increase in depreciation, depletion, and amortization expense, which was comprised of accretion of the asset retirement obligation and depletion of the increase in capitalized cost of oil and gas properties. -19- The components of the change in asset retirement obligations for the three and nine months ended September 30, 2006 and 2005 are as shown below. I-D Partnership --------------- Three Months Three Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Total Asset Retirement Obligation, July 1 $ 59,844 $ 31,481 Additions and revisions - 29,540 Settlements and disposals ( 760) - Accretion expense 651 1,543 Discontinued operations ( 26,396) - -------- -------- Total Asset Retirement Obligation, End of Quarter $ 33,339 $ 62,564 ======== ======== Nine Months Nine Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Total Asset Retirement Obligation, January 1 $ 58,368 $ 31,101 Additions and revisions - 29,685 Settlements and disposals ( 760) ( 448) Accretion expense 2,127 2,226 Discontinued operations ( 26,396) - -------- -------- Total Asset Retirement Obligation, End of Period $ 33,339 $ 62,564 ======== ======== Asset Retirement Obligation - Current $ 1,506 $ 2,337 Asset Retirement Obligation - Long-Term 31,833 60,227 -20- I-E Partnership --------------- Three Months Three Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Total Asset Retirement Obligation, July 1 $763,975 $349,377 Additions and revisions - 365,183 Settlements and disposals ( 3,280) - Accretion expense 8,212 17,830 Discontinued operations ( 213,055) - -------- -------- Total Asset Retirement Obligation, End of Quarter $555,852 $732,390 ======== ======== Nine Months Nine Months Ended Ended 9/30/2006 9/30/2005 ----------- ----------- Total Asset Retirement Obligation, January 1 $840,935 $345,509 Additions and revisions - 365,977 Settlements and disposals ( 98,303) ( 2,922) Accretion expense 26,275 23,826 Discontinued operations ( 213,055) - -------- -------- Total Asset Retirement Obligation, End of Period $555,852 $732,390 ======== ======== Asset Retirement Obligation - Current $ 14,220 $ 13,433 Asset Retirement Obligation - Long-Term 541,632 718,957 -21- I-F Partnership --------------- Three Months Three Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Total Asset Retirement Obligation, July 1 $335,950 $166,508 Additions and revisions ( 599) 158,373 Settlements and disposals ( 1,529) - Accretion expense 3,560 7,915 Discontinued operations ( 114,761) - -------- -------- Total Asset Retirement Obligation, End of Quarter $222,621 $332,796 ======== ======== Nine Months Nine Months Ended Ended 9/30/2006 9/30/2005 ----------- ----------- Total Asset Retirement Obligation, January 1 $394,308 $164,771 Additions and revisions ( 1,799) 158,751 Settlements and disposals ( 66,847) ( 1,533) Accretion expense 11,720 10,807 Discontinued operations ( 114,761) - -------- -------- Total Asset Retirement Obligation, End of Period $222,621 $332,796 ======== ======== Asset Retirement Obligation - Current $ 5,603 $ 5,664 Asset Retirement Obligation - Long-Term 217,018 327,132 -22- 2. TRANSACTIONS WITH RELATED PARTIES --------------------------------- The Partnerships' partnership agreements (the "Partnership Agreements") provide for reimbursement to the General Partner for all direct general and administrative expenses and for the general and administrative overhead applicable to the Partnerships based on an allocation of actual costs incurred. During the three months ended September 30, 2006, the following payments were made to the General Partner or its affiliates by the Partnerships: Direct General Administrative Partnership and Administrative Overhead ----------- ------------------- --------------- I-D $ 1,598 $ 19,986 I-E 4,132 116,220 I-F 2,119 39,780 During the nine months ended September 30, 2006, the following payments were made to the General Partner or its affiliates by the Partnerships: Direct General Administrative Partnership and Administrative Overhead ----------- ------------------- --------------- I-D $29,093 $ 59,958 I-E 39,921 348,660 I-F 31,327 119,340 Affiliates of the Partnerships operate certain of the Partnerships' properties and their policy is to bill the Partnerships for all customary charges and cost reimbursements associated with their activities. 3. DISCONTINUED OPERATIONS ----------------------- During August 2006, the General Partner approved a plan to sell an increased amount of the Partnerships' properties as a result of the generally favorable current environment for oil and gas properties. On October 11, 2006, the Partnerships sold their interests in a number of producing properties at a large public oil and gas auction which resulted in proceeds of approximately $5,000, $134,000, and $88,000 (net of fees), respectively to the I-D, I-E, and I-F Partnerships. The sale resulted in a gain on disposal of discontinued operations of approximately $11,000, $158,000, and $103,000, respectively, for the I-D, I-E, and I-F Partnerships. The gain for the Partnerships consisted of the proceeds received from the sale and the extinguishment of net liabilities of approximately $6,000, $24,000, and $15,000, respectively, for the I-D, I-E, and I-F Partnerships. It is anticipated that additional properties will be sold at auction in December 2006 and February 2007. The properties sold in the October auction and those scheduled to be sold in the December 2006 and February 2007 auction represent a disposal of a business segment under Statement of Financial Accounting Standards No. 144, "Accounting for the Impairment or Disposal of Long-Lived -23- Assts" (FAS 144). Accordingly, current year results of these properties have been classified as discontinued, and prior periods have been restated. In conjunction with the planned sales, the Partnerships will retain all assets and liabilities through the effective date of the sale and the buyers will assume the asset retirement obligations associated with the sold interests. Net income from discontinued operations are as follows: I-D Partnership --------------- Three Months Three Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Oil and gas sales $116,263 $140,071 Lease operating ( 4,541) ( 8,375) Production tax ( 4,480) ( 21,278) Depreciation, depletion, and amortization of oil and gas properties ( 294) ( 8,793) Impairment provision ( 1,737) - -------- -------- Income from discontinued operations $105,211 $101,625 ======== ======== Nine Months Nine Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Oil and gas sales $339,931 $364,940 Lease operating ( 18,693) ( 22,148) Production tax ( 22,265) ( 50,319) Depreciation, depletion, and amortization of oil and gas properties ( 5,187) ( 19,052) Impairment provision ( 1,737) - -------- -------- Income from discontinued operations $292,049 $273,421 ======== ======== -24- I-E Partnership --------------- Three Months Three Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Oil and gas sales $713,534 $887,490 Lease operating ( 29,626) ( 52,082) Production tax ( 59,314) ( 121,135) Depreciation, depletion, and amortization of oil and gas properties ( 2,258) ( 57,352) Impairment provision ( 7,326) - -------- -------- Income from discontinued operations $615,010 $656,921 ======== ======== Nine Months Nine Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Oil and gas sales $2,068,769 $2,352,700 Lease operating ( 119,315) ( 146,841) Production tax ( 177,418) ( 328,614) Depreciation, depletion, and amortization of oil and gas properties ( 31,457) ( 100,572) Impairment provision ( 7,326) - ---------- ---------- Income from discontinued operations $1,733,253 $1,776,673 ========== ========== I-F Partnership --------------- Three Months Three Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Oil and gas sales $158,755 $226,609 Lease operating ( 8,505) ( 11,151) Production tax ( 32,071) ( 59,526) Depreciation, depletion, and amortization of oil and gas properties ( 1,192) ( 24,354) Impairment provision ( 3,514) - -------- -------- Income from discontinued operations $113,473 $131,578 ======== ======== -25- Nine Months Nine Months Ended Ended 9/30/2006 9/30/2005 ------------ ------------ Oil and gas sales $460,321 $549,733 Lease operating ( 23,744) ( 29,256) Production tax ( 102,097) ( 133,181) Depreciation, depletion, and amortization of oil and gas properties ( 12,023) ( 38,219) Impairment provision ( 3,514) - -------- -------- Income from discontinued operations $318,943 $349,077 ======== ======== Assets of the discontinued operations for the nine months ended September 30, 2006 were as follows: I-D Partnership ----------- Accounts receivable - oil and gas sales $ 99,872 Oil and gas properties 1,741,230 Accumulated depreciation, depletion, and amortization of oil and gas properties ( 1,564,019) ----------- Net assets held for sale $ 277,083 =========== I-E Partnership ----------- Accounts receivable - oil and gas sales $ 622,684 Oil and gas properties 11,259,579 Accumulated depreciation, depletion, and amortization of oil and gas properties ( 10,356,073) ----------- Net assets held for sale $ 1,526,190 =========== -26- I-F Partnership ------------ Accounts receivable - oil and gas sales $ 114,743 Oil and gas properties 2,092,528 Accumulated depreciation, depletion, and amortization of oil and gas properties ( 1,744,254) ----------- Net assets held for sale $ 463,017 =========== -27- ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS USE OF FORWARD-LOOKING STATEMENTS AND ESTIMATES - ----------------------------------------------- This Quarterly Report contains certain forward-looking statements. The words "anticipate", "believe", "expect", "plan", "intend", "estimate", "project", "could", "may" and similar expressions are intended to identify forward-looking statements. Such statements reflect management's current views with respect to future events and financial performance. This Quarterly Report also includes certain information, which is, or is based upon, estimates and assumptions. Such estimates and assumptions are management's efforts to accurately reflect the condition and operation of the Partnerships. Use of forward-looking statements and estimates and assumptions involve risks and uncertainties which include, but are not limited to, the volatility of oil and gas prices, the uncertainty of reserve information, the operating risk associated with oil and gas properties (including the risk of personal injury, death, property damage, damage to the well or producing reservoir, environmental contamination, and other operating risks), the prospect of changing tax and regulatory laws, the availability and capacity of processing and transportation facilities, the general economic climate, the supply and price of foreign imports of oil and gas, the level of consumer product demand, and the price and availability of alternative fuels. Should one or more of these risks or uncertainties occur or should estimates or underlying assumptions prove incorrect, actual conditions or results may vary materially and adversely from those stated, anticipated, believed, estimated, and otherwise indicated. DISCONTINUED OPERATIONS - ----------------------- In October 2006, the Partnerships sold their interests in a number of producing properties. This disposal was treated as a discontinued operation. The sales proceeds consisting of approximately $5,000, $134,000, and $88,000, respectively, were included in the November 15, 2006 cash distributions paid by the I-D, I-E, and I-F Partnerships. The sale of these producing properties will impact the continuing future operations of the Partnerships. It is anticipated that these Partnerships will have lower lease operating costs, lower oil and gas sales, and a reduction in their asset retirement obligations. The reader should refer to Note 3 - Discontinued Operations to the consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for additional information regarding this matter. -28- GENERAL - ------- The Partnerships are engaged in the business of acquiring and operating producing oil and gas properties located in the continental United States. In general, a Partnership acquired producing properties and did not engage in development drilling or enhanced recovery projects, except as an incidental part of the management of the producing properties acquired. Therefore, the economic life of each Partnership, and its related Production Partnership, is limited to the period of time required to fully produce its acquired oil and gas reserves. The net proceeds from the oil and gas operations are distributed to the Limited Partners and the General Partner in accordance with the terms of the Partnership Agreements. LIQUIDITY AND CAPITAL RESOURCES - ------------------------------- The Partnerships began operations and investors were assigned their rights as Limited Partners, having made capital contributions in the amounts and on the dates set forth below: Limited Date of Partner Capital Partnership Activation Contributions ----------- ------------------ --------------- I-D March 4, 1986 $ 7,194,700 I-E September 10, 1986 41,839,400 I-F December 16, 1986 14,320,900 In general, the amount of funds available for acquisition of producing properties was equal to the capital contributions of the Limited Partners, less 15% for sales commissions and organization and management fees. All of the Partnerships have fully invested their capital contributions. Net proceeds from the operations less necessary operating capital are distributed to the Limited Partners on a quarterly basis. Revenues and net proceeds of a Partnership are largely dependent upon the volumes of oil and gas sold and the prices received for such oil and gas. While the General Partner cannot predict future pricing trends, it believes the working capital available as of September 30, 2006 and the net revenue generated from future operations will provide sufficient working capital to meet current and future obligations. -29- Occasional expenditures for new wells or well recompletions, or workovers may reduce or eliminate cash available for a particular quarterly cash distribution. During the nine months ended September 30, 2006, capital expenditures for the I-F Partnership totaled $54,000. These expenditures were primarily due to drilling activities in a large unitized property, the Jo-Mill Unit in Borden County, Texas. The I-F Partnership owns a working interest of approximately 0.28% in this unitized property. The Jo-Mill Unit is included in discontinued operations and is anticipated to be sold in the next twelve months. The reader should refer to Note 3 - Discontinued Operations to the consolidated financial statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for additional information regarding this matter. Other capital expenditures incurred by the Partnerships during the nine months ended September 30, 2006 and 2005 were not material to the Partnerships' cash flow. Pursuant to the terms of the Partnership Agreements, the Partnerships would have terminated on December 31, 1999. However, the Partnership Agreements provide that the General Partner may extend the term of each Partnership for up to five periods of two years each. The General Partner has extended the terms of the Partnerships for their fourth two year extension period to December 31, 2007. As of the date of this Quarterly Report, the General Partner has not determined whether to further extend the term of any Partnership. CRITICAL ACCOUNTING POLICIES - ---------------------------- The Partnerships follow the successful efforts method of accounting for their oil and gas properties. Under the successful efforts method, the Partnerships capitalize all property acquisition costs and development costs incurred in connection with the further development of oil and gas reserves. Property acquisition costs include costs incurred by the Partnerships or the General Partner to acquire producing properties, including related title insurance or examination costs, commissions, engineering, legal and accounting fees, and similar costs directly related to the acquisitions plus an allocated portion of the General Partner's property screening costs. The acquisition cost to the Partnerships of the properties acquired by the General Partner is adjusted to reflect the net cash results of operations, including interest incurred to finance the acquisition, for the period of time the properties are held by the General Partner. -30- Depletion of the cost of producing oil and gas properties, amortization of related intangible drilling and development costs, and depreciation of tangible lease and well equipment are computed on the unit-of-production method. The Partnerships' calculation of depreciation, depletion, and amortization includes estimated dismantlement and abandonment costs and estimated salvage value of the equipment. When complete units of depreciable property are retired or sold, the asset cost and related accumulated depreciation are eliminated with any gain or loss (including the elimination of the asset retirement obligation) reflected in income. When less than complete units of depreciable property are retired or sold, the proceeds are credited to oil and gas properties. The Partnerships evaluate the recoverability of the carrying costs of their proved oil and gas properties for each well. If the unamortized costs, net of salvage value, of oil and gas properties exceeds the expected undiscounted future cash flows from such properties, the cost of the properties is written down to fair value, which is determined by using the estimated discounted future cash flows from the properties. In the third quarter of 2006, natural gas prices declined significantly. Consequently, the partnerships incurred impairments utilizing the natural gas spot prices that existed on September 30, 2006. The impairments recognized in the third quarter totaled $3,000, $43,000, and $21,000 for the I-D, I-E and I-F Partnerships, respectively. Since oil and natural gas prices remain volatile, the partnerships may be required to write down the carrying value of its oil and natural gas properties at the end of future reporting periods. If an impairment is required, it would result in a charge to earnings but would not impact cash flow from operating activities. Once incurred, an impairment of oil and natural gas properties is not reversible. The Deferred Charge on the Balance Sheets represents costs deferred for lease operating expenses incurred in connection with the Partnerships' underproduced gas imbalance positions. Conversely, the Accrued Liability represents charges accrued for lease operating expenses incurred in connection with the Partnerships' overproduced gas imbalance positions. The rate used in calculating the Deferred Charge and Accrued Liability is the annual average production costs per Mcf. The Partnerships' oil and condensate production is sold, title passed, and revenue recognized at or near the Partnerships' wells under short-term purchase contracts at prevailing prices in accordance with arrangements which are customary in the oil and gas industry. Sales of gas applicable to the Partnerships' interest in producing oil and gas leases are recorded as revenue when the gas is metered and title transferred pursuant to the gas sales contracts covering the Partnerships' interest in gas reserves. During such times as a Partnership's sales of gas -31- exceed its pro rata ownership in a well, such sales are recorded as revenues unless total sales from the well have exceeded the Partnership's share of estimated total gas reserves underlying the property, at which time such excess is recorded as a liability. The rates per Mcf used to calculate this liability are based on the average gas price for which the Partnerships are currently settling this liability. These amounts were recorded as gas imbalance payables in accordance with the sales method. These gas imbalance payables will be settled by either gas production by the underproduced party in excess of current estimates of total gas reserves for the well or by negotiated or contractual payment to the underproduced party. ASSET RETIREMENT OBLIGATIONS - ---------------------------- The Partnerships' wells must be properly plugged and abandoned after their oil and gas reserves are exhausted. The Partnerships follow FAS No. 143, "Accounting for Asset Retirement Obligations" in accounting for the future expenditures that will be necessary to plug and abandon these wells. FAS No. 143 requires the estimated plugging and abandonment obligations to be (i) recognized in the period in which they are incurred (i.e. when the well is drilled or acquired) if a reasonable estimate of fair value can be made and (ii) capitalized as part of the carrying amount of the well. NEW ACCOUNTING PRONOUNCEMENTS - ----------------------------- In September 2006, the FASB issued FAS No. 157, "Fair Value Measurements" (FAS No. 157). FAS No. 157 establishes a common definition for fair value to be applied to US GAAP guidance requiring use of fair value, establishes a framework for measuring fair value, and expands the disclosure about such fair value measurements. FAS No. 157 is effective for fiscal years beginning after November 5, 2007. The Partnerships are currently assessing the impact of FAS No. 157 on its results of operations, financial condition and cash flows. In September 2006, the SEC staff issued Staff Accounting Bulletin (SAB) Topic 108, "Financial Statements - Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements" (SAB 108). The SEC staff is providing guidance on how prior year misstatements should be taken into consideration when quantifying misstatements in current year financial statements for purposes of determining whether the current year's financial statements are materially misstated and should be restated. SAB 108 is effective for fiscal years ending after November 18, 2006, and early application is encouraged. The Partnerships do not believe SAB 108 will -32- have a material impact on its results of operations, financial condition and cash flows. PROVED RESERVES AND NET PRESENT VALUE - ------------------------------------- The process of estimating oil and gas reserves is complex, requiring significant subjective decisions in the evaluation of available geological, engineering, and economic data for each reservoir. The data for a given reservoir may change substantially over time as a result of, among other things, additional development activity, production history, and viability of production under varying economic conditions; consequently, it is reasonably possible that material revisions to existing reserve estimates may occur in the future. Although every reasonable effort has been made to ensure that these reserve estimates represent the most accurate assessment possible, the significance of the subjective decisions required and variances in available data for various reservoirs make these estimates generally less precise than other estimates presented in connection with financial statement disclosures. The following tables summarize changes in net quantities of the Partnerships' proved reserves, all of which are located in the United States, for the periods indicated. The proved reserves were estimated by petroleum engineers employed by affiliates of the Partnerships, and are annually reviewed by an independent engineering firm. "Proved reserves" refers to those estimated quantities of crude oil, gas, and gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known oil and gas reservoirs under existing economic and operating conditions. The following information includes certain gas balancing adjustments which cause the gas volumes to differ from the reserve reports prepared by the General Partner. -33- I-D Partnership --------------- Crude Natural Oil Gas (Barrels) (Mcf) --------- ----------- Proved reserves, Dec. 31, 2005 71,529 1,559,316 Production ( 813) ( 31,170) Extensions and discoveries 8 361 Revisions of previous ( 69) ( 22,575) estimates ------ --------- Proved reserves, March 31, 2006 70,655 1,505,932 Production ( 764) ( 33,812) Extensions and discoveries 13,636 235 Revisions of previous estimates 439 124,859 ------ --------- Proved reserves, June 30, 2006 83,966 1,597,214 Production of continuing operations ( 210) ( 21,098) Production of discontinued operations ( 607) ( 13,116) Extensions and discoveries - 13,604 Discontinued operations (70,248) ( 565,096) Revisions of previous ( 2,782) ( 83,305) estimates ------ --------- Proved reserves, Sept. 30, 2006 10,119 928,203 ====== ========= -34- I-E Partnership --------------- Crude Natural Oil Gas (Barrels) (Mcf) --------- ----------- Proved reserves, Dec. 31, 2005 531,483 8,258,668 Production ( 9,312) ( 168,785) Extensions and discoveries 31 1,712 Revisions of previous estimates 2,178 ( 128,367) ------- --------- Proved reserves, March 31, 2006 524,380 7,963,228 Production ( 9,677) ( 184,416) Extensions and discoveries 58,854 2,213 Revisions of previous estimates 40,213 727,941 ------- --------- Proved reserves, June 30, 2006 613,770 8,508,966 Production of continuing operations ( 5,643) ( 100,542) Production of discontinued operations ( 3,487) ( 83,076) Extensions and discoveries - 41,891 Discontinued operations (386,306) (3,578,641) Revisions of previous estimates ( 30,922) ( 486,480) ------- --------- Proved reserves, Sept. 30, 2006 187,412 4,302,118 ======= ========= -35- I-F Partnership --------------- Crude Natural Oil Gas (Barrels) (Mcf) --------- ----------- Proved reserves, Dec. 31, 2005 250,616 2,453,345 Production ( 4,260) ( 47,679) Extensions and discoveries 15 799 Revisions of previous estimates 1,190 ( 54,758) ------- --------- Proved reserves, March 31, 2006 247,561 2,351,707 Production ( 4,495) ( 49,593) Extensions and discoveries 27,439 1,034 Revisions of previous estimates 26,346 47,565 ------- --------- Proved reserves, June 30, 2006 296,851 2,350,713 Production of continuing operations ( 2,438) ( 43,406) Production of discontinued operations ( 1,810) ( 6,453) Extensions and discoveries - 16,908 Discontinued operations (198,953) ( 310,271) Revisions of previous estimates ( 14,730) ( 181,181) ------- --------- Proved reserves, Sept. 30, 2006 78,920 1,826,310 ======= ========= The net present value of the Partnerships' reserves may change dramatically as oil and gas prices change or as volumes change for the reasons described above. Net present value represents estimated future gross cash flow from the production and sale of proved reserves, net of estimated oil and gas production costs (including production taxes, ad valorem taxes, and operating expenses) and estimated future development costs, discounted at 10% per annum. The following table indicates the estimated net present value of the Partnerships' proved reserves as of September 30, 2006, June 30, 2006, March 31, 2006, and December 31, 2005. Net present value attributable to the Partnerships' proved reserves was calculated on the basis of current costs and prices as of the date of estimation. Such prices were not escalated except in certain circumstances where escalations were fixed and readily determinable in accordance with applicable contract provisions. The table also indicates the oil and gas prices in effect on the dates corresponding to the reserve valuations. Changes in oil and gas prices cause the estimates of remaining economically -36- recoverable reserves, as well as the values placed on said reserves, to fluctuate. The prices used in calculating the net present value attributable to the Partnerships' proved reserves do not necessarily reflect market prices for oil and gas production subsequent to September 30, 2006. There can be no assurance that the prices used in calculating the net present value of the Partnerships' proved reserves at September 30, 2006 will actually be realized for such production. Net Present Value of Reserves (In 000's) ---------------------------------------------- Partnership 9/30/06 6/30/06 3/31/06 12/31/05 ----------- ------- ------- ------- -------- I-D $ 1,751 $ 5,091 $ 5,343 $ 7,249 I-E 10,871 30,612 31,294 41,189 I-F 4,592 10,891 11,083 13,400 Oil and Gas Prices --------------------------------------------- Pricing 9/30/06 6/30/06 3/31/06 12/31/05 ----------- ------- ------- ------- -------- Oil (Bbl) $ 62.90 $ 73.94 $ 66.25 $ 61.06 Gas (Mcf) 4.18 6.09 7.18 10.08 The Partnerships had decreases in estimated oil and gas reserves and the related estimated net present value of reserves at September 30, 2006 as compared to June 30, 2006 due to the decreases in the oil and gas prices used to run the reserves and the removal of the reserves related to discontinued operations. RESULTS OF OPERATIONS - --------------------- GENERAL DISCUSSION The following general discussion should be read in conjunction with the analysis of results of operations provided below. The primary source of liquidity and Partnership cash distributions comes from the net revenues generated from the sale of oil and gas. The level of net revenues is highly dependent upon the total volumes of oil and natural gas sold. Oil and gas reserves are depleting assets and will experience production declines over time, thereby likely resulting in reduced net revenues. The level of net revenues is also highly dependent upon the prices received for oil and gas sales, which are very volatile. -37- Additionally, lower prices may reduce the amount of oil and gas that is economic to produce and reduce the Partnerships' revenues and cash flow. Various factors beyond the Partnerships' control will affect prices for oil and natural gas, such as: * Worldwide and domestic supplies of oil and natural gas; * The ability of the members of the Organization of Petroleum Exporting Countries ("OPEC") to agree to and maintain oil prices and production quotas; * Political instability or armed conflict in oil-producing regions or around major shipping areas; * The level of consumer demand and overall economic activity; * The competitiveness of alternative fuels; * Weather conditions and the impact of weather- related events; * The availability of pipelines for transportation * Domestic and foreign government regulations and taxes; and * Market expectations. It is not possible to predict the future direction of oil or natural gas prices or whether the above discussed trends will continue. Operating costs, including General and Administrative Expenses, may not decline over time, may increase, or may experience only a gradual decline, thus adversely affecting net revenues. Net revenues may also be affected by proceeds from property sales or additional costs resulting from well workovers, recompletions, new well drilling, and other events. In addition to pricing, the level of net revenues is highly dependent upon the total volumes of oil and natural gas sold. Oil and gas reserves are depleting assets and will experience production declines over time, thereby likely resulting in reduced net revenues. Despite this general trend of declining production, several factors can cause volumes sold to increase, remain relatively constant, or decrease at an even greater rate over a given period. These factors include, but are not limited to: * Geophysical conditions which cause an acceleration of the decline in production; * The shutting-in of wells due to low oil and gas prices (or the opening of previously shut-in wells due to high oil and gas prices), mechanical difficulties, loss of a market/transportation, or performance of workovers, recompletions, or other operations in the well; * Prior period volume adjustments made by the operators of the properties; * Adjustments in ownership or rights to production (such as adjustments that occur at payout or due to gas balancing); and -38- * Completion of enhanced recovery projects which increase production for the well. Many of these factors can be very significant for a single well or for many wells over a short period of time. Due to the large number of wells owned by the Partnerships, these factors are generally not material as compared to the normal declines in production experienced on all remaining wells. I-D PARTNERSHIP THREE MONTHS ENDED SEPTEMBER 30, 2006 COMPARED TO THE THREE MONTHS ENDED SEPTEMBER 30, 2005. Three Months Ended September 30, -------------------------------- 2006 2005(a) -------- -------- Oil and gas sales $163,339 $184,815 Oil and gas production expenses $ 27,364 $ 26,132 Barrels produced 210 268 Mcf produced 21,098 20,870 Average price/Bbl $ 66.30 $ 58.85 Average price/Mcf $ 7.08 $ 8.10 (a) The foregoing chart and the following discussion contain amounts for the year 2005 which have been restated to reflect the Partnership's assets held for sale as discontinued operations. See Part I, Item 2 - Discontinued Operations for more information about these discontinued operations. As shown in the table above, total oil and gas sales decreased $21,000 (11.6%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. Of this decrease $21,000 was related to a decrease in the average price of gas sold. Volumes of oil sold decreased 58 barrels, while volumes of gas sold increased 228 Mcf for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. The decrease in volumes of oil sold was primarily due to normal declines in production. The increase in volumes of gas sold was primarily due to the successful completion of two wells during mid 2006 and an increase in the I-D Partnership's revenue interest on another well during the three months ended September 30, 2006. These increases were partially offset by normal declines in production. Oil and gas production expenses (including lease operating expenses and production taxes) increased $1,000 (4.7%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. This increase was primarily due to (i) workover expenses incurred on several wells during the three months ended September 30, 2006 and (ii) repair and maintenance expenses incurred on another -39- significant well during the three months ended September 30, 2006. These increases were partially offset by (i) the receipt of a $2,000 lease operating expense credit resulting from the settlement of a class action lawsuit on several wells during the three months ended September 30, 2006 and (ii) a decrease in production taxes associated with the decrease in oil and gas sales. As a percentage of oil and gas sales, these expenses increased to 16.8% for the three months ended September 30, 2006 from 14.1% for the three months ended September 30, 2005, primarily due to the decrease in oil and gas sales and the dollar increase in production expenses. Depreciation, depletion, and amortization ("DD&A") of oil and gas properties decreased $3,000 (37.7%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. This decrease was primarily due to several wells being fully depleted during 2005 due to their lack of remaining reserves. As a percentage of oil and gas sales, this expense decreased to 2.9% for the three months ended September 30, 2006 from 4.1% for the three months ended September 30, 2005, primarily due to the dollar decrease in DD&A. The I-D Partnership recognized a non-cash charge against earnings of $3,000 during the three months ended September 30, 2006. This charge was related to the decline in oil and gas prices used to determine recoverability of oil and gas reserves at September 30, 2006. No such charge was incurred during the three months ended September 30, 2005. General and administrative expenses remained relatively constant for the three months ended September 30, 2006 and 2005. As a percentage of oil and gas sales, these expenses increased to 13.2% for the three months ended September 30, 2006 from 11.9% for the three months ended September 30, 2005, primarily due to the decrease in oil and gas sales. As further discussed in Part I, Item 2 - Discontinued Operations, the I-D Partnership is in the process of selling an increased amount of the Partnership's properties as a result of the generally favorable current environment for oil and gas dispositions. It is anticipated that the Partnership will have a lower oil and gas sales and lower production expenses with the sale of these properties. -40- NINE MONTHS ENDED SEPTEMBER 30, 2006 COMPARED TO THE NINE MONTHS ENDED SEPTEMBER 30, 2005. Nine Months Ended September 30, ------------------------------- 2006 2005(a) -------- -------- Oil and gas sales $462,130 $517,603 Oil and gas production expenses $ 81,072 $ 85,896 Barrels produced 601 825 Mcf produced 60,967 68,430 Average price/Bbl $ 64.83 $ 52.17 Average price/Mcf $ 6.94 $ 6.94 (a) The foregoing chart and the following discussion contain amounts for the year 2005 which have been restated to reflect the Partnership's assets held for sale as discontinued operations. See Part I, Item 2 - Discontinued Operations for more information about these discontinued operations. As shown in the table above, total oil and gas sales decreased $55,000 (10.7%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. Of this decrease $12,000 and $52,000 were related to decreases in volumes of oil and gas sold. These decreases were partially offset by an increase of $8,000 related to an increase in the average price of oil sold. Volumes of oil and gas sold decreased 224 barrels and 7,463 Mcf for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. The decrease in volumes of oil sold was primarily due to normal declines in production. The decrease in volumes of gas sold was primarily due to (i) normal declines in production and (ii) positive prior period volume adjustments made by the operators on several wells during the nine months ended September 30, 2005. These decreases were partially offset by (i) the successful completion of two wells during mid 2006 and (ii) an increase in the I-D Partnership's revenue interest on another well during the nine months ended September 30, 2006. Oil and gas production expenses (including lease operating expenses and production taxes) decreased $5,000 (5.6%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. This decrease was primarily due to (i) a reduction in workover expenses for the nine months ended September 30, 2006 when compared to the same period in 2005, (ii) the receipt of a $2,000 lease operating expense credit resulting from the settlement of a class action lawsuit on several wells during the nine months ended September 30, 2006, and (iii) a decrease in production taxes associated with the decrease in oil and gas sales. As a percentage of oil and gas sales, these expenses increased -41- to 17.5% for the nine months ended September 30, 2006 from 16.6% for the nine months ended September 30, 2005. DD&A of oil and gas properties decreased $3,000 (19.6%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. This decrease was primarily due to (i) several wells being fully depleted during 2005 due to their lack of remaining reserves and (ii) the decreases in volumes of oil and gas sold. These decreases in DD&A were partially offset by downward revisions in the estimates of remaining oil and gas reserves since September 30, 2005. As a percentage of oil and gas sales, this expense decreased to 2.6% for the nine months ended September 30, 2006 from 2.9% for the nine months ended September 30, 2005, primarily due to the dollar decrease in DD&A. The I-D Partnership recognized a non-cash charge against earnings of $3,000 during the nine months ended September 30, 2006. This charge was related to the decline in oil and gas prices used to determine recoverability of oil and gas reserves at September 30, 2006. No such charge was incurred during the nine months ended September 30, 2005. General and administrative expenses increased $1,000 (1.5%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. As a percentage of oil and gas sales, these expenses increased to 19.3% for the nine months ended September 30, 2006 from 17.0% for the nine months ended September 30, 2005, primarily due to the decrease in oil and gas sales. As further discussed in Part I, Item 2 - Discontinued Operations, the I-D Partnership is in the process of selling an increased amount of the Partnership's properties as a result of the generally favorable current environment for oil and gas dispositions. It is anticipated that the Partnership will have lower oil and gas sales and lower production expenses with the sale of these properties. The Limited Partners have received cash distributions through September 30, 2006 totaling $18,463,175 or 256.62% of Limited Partners' capital contributions. -42- I-E PARTNERSHIP THREE MONTHS ENDED SEPTEMBER 30, 2006 COMPARED TO THE THREE MONTHS ENDED SEPTEMBER 30, 2005. Three Months Ended September 30, -------------------------------- 2006 2005(a) ---------- ---------- Oil and gas sales $1,096,141 $1,204,729 Oil and gas production expenses $ 89,628 $ 238,179 Barrels produced 5,643 6,761 Mcf produced 100,542 98,061 Average price/Bbl $ 67.40 $ 57.94 Average price/Mcf $ 7.12 $ 8.29 (a) The foregoing chart and the following discussion contain amounts for the year 2005 which have been restated to reflect the Partnership's assets held for sale as discontinued operations. See Part I, Item 2 - Discontinued Operations for more information about these discontinued operations. As shown in the table above, total oil and gas sales decreased $109,000 (9.0%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. Of this decrease (i) $118,000 was related to a decrease in the average price of gas sold and (ii) $65,000 was related to a decrease in volumes of oil sold. These decreases were partially offset by (i) $53,000 attributable to an increase in the average price of oil sold and (ii) $21,000 increase associated with an increase in volumes of gas sold. Volumes of oil sold decreased 1,118 barrels, while volumes of gas sold increased 2,481 Mcf for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. The decrease in volumes of oil sold was primarily due to normal declines in production. The increase in volumes of gas sold was primarily due (i) the successful completion of two wells during mid 2006 and (ii) an increase in the I-E Partnership's revenue interest on another well during the three months ended September 30, 2006. These increases were partially offset by normal declines in production. Oil and gas production expenses (including lease operating expenses and production taxes) decreased $149,000 (62.4%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. This decrease was primarily due to (i) the receipt of a $231,000 lease operating expense credit resulting from the settlement of a class action lawsuit on several wells during the three months ended September 30, 2006 and (ii) a decrease in production taxes associated with the decrease in oil and gas sales. These decreases were partially offset by workover expenses incurred on several wells during the three months -43- ended September 30, 2006. As of the date of this Quarterly Report, management anticipates workover costs remaining at or increasing above 2006 levels due to the increased cost to perform a workover and the age of the wellbores. As a percentage of oil and gas sales, these expenses decreased to 8.2% for the three months ended September 30, 2006 from 19.8% for the three months ended September 30, 2005, primarily due to the dollar decrease in production expenses. DD&A of oil and gas properties decreased $32,000 (39.6%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. This decrease was primarily due to several wells being fully depleted during 2005 due to their lack of remaining reserves. As a percentage of oil and gas sales, this expense decreased to 4.4% for the three months ended September 30, 2006 from 6.7% for the three months ended September 30, 2005, primarily due to the dollar decrease in DD&A. The I-E Partnership recognized a non-cash charge against earnings of $43,000 during the three months ended September 30, 2006. This charge was related to the decline in oil and gas prices used to determine recoverability of oil and gas reserves at September 30, 2006. No such charge was incurred during the three months ended September 30, 2005. General and administrative expenses decreased $1,000 (1.1%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. As a percentage of oil and gas sales, these expenses increased to 11.0% for the three months ended September 30, 2006 from 10.1% for the three months ended September 30, 2005. As further discussed in Part I, Item 2 - Discontinued Operations, the I-E Partnership is in the process of selling an increased amount of the Partnership's properties as a result of the generally favorable current environment for oil and gas dispositions. It is anticipated that the Partnership will have lower oil and gas sales and lower production expenses with the sale of these properties. NINE MONTHS ENDED SEPTEMBER 30, 2006 COMPARED TO THE NINE MONTHS ENDED SEPTEMBER 30, 2005. Nine Months Ended September 30, ------------------------------- 2006 2005(a) ---------- ---------- Oil and gas sales $3,172,574 $3,276,077 Oil and gas production expenses $ 652,979 $ 625,579 Barrels produced 17,791 18,744 Mcf produced 292,011 327,098 Average price/Bbl $ 64.33 $ 52.59 Average price/Mcf $ 6.95 $ 7.00 (a) The foregoing chart and the following discussion contain amounts for the year 2005 which have been restated to -44- reflect the Partnership's assets held for sale as discontinued operations. See Part I, Item 2 - Discontinued Operations for more information about these discontinued operations. As shown in the table above, total oil and gas sales decreased $104,000 (3.2%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. Of this decrease (i) $50,000 and $246,000 were related to decreases in volumes of oil and gas sold and (ii) $17,000 was related to a decrease in the average price of gas sold. These decreases were partially offset by an increase of $209,000 related to an increase in the average price of oil sold. Volumes of oil and gas sold decreased 953 barrels and 35,087 Mcf for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. The decrease in volumes of oil sold was primarily due to normal declines in production. This decrease was partially offset by (i) a negative prior period volume adjustment made by the operator on one significant well during the nine months ended September 30, 2005 and (ii) increases in production on two significant wells following their successful workovers during late 2005. The decrease in volumes of gas sold was primarily due to (i) normal declines in production and (ii) positive prior period volume adjustments made by the operators on several wells during the nine months ended September 30, 2005. These decreases were partially offset by (i) the successful completion of two wells and (ii) an increase in the I-E Partnership's revenue interest on another well during the nine months ended September 30, 2006. Oil and gas production expenses (including lease operating expenses and production taxes) increased $27,000 (4.4%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. This increase was primarily due to (i) abandonment expenses incurred on two significant wells during the nine months ended September 30, 2006, (ii) a reversal during the nine months ended September 30, 2005 of $89,000 of a charge previously accrued for a judgment, and (iii) workover expenses incurred on several wells during the nine months ended September 30, 2006. As of the date of this Quarterly Report, management anticipates workover costs remaining at or increasing above 2006 levels due to the increased cost to perform a workover and the age of the wellbores. These increases were partially offset by the receipt of a $231,000 lease operating expense credit resulting from the settlement of a class action lawsuit on several other wells during the nine months ended September 30, 2006. As a percentage of oil and gas sales, these expenses increased to 20.6% for the nine months ended September 30, 2006 from 19.1% for the nine months ended September 30, 2005. -45- DD&A of oil and gas properties decreased $3,000 (2.2%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. This decrease was primarily due to (i) several wells being fully depleted during 2005 due to their lack of remaining reserves and (ii) the decreases in volumes of oil and gas sold. The decreases in DD&A were partially offset by downward revisions in the estimates of remaining oil and gas reserves since September 30, 2005. As a percentage of oil and gas sales, this expense increased to 4.0% for the nine months ended September 30, 2006 from 3.9% for the nine months ended September 30, 2005. The I-E Partnership recognized a non-cash charge against earnings of $43,000 during the nine months ended September 30, 2006. This charge was related to the decline in oil and gas prices used to determine recoverability of oil and gas reserves at September 30, 2006. No such charge was incurred during the nine months ended September 30, 2005. General and administrative expenses remained relatively constant for the nine months ended September 30, 2006 and 2005. As a percentage of oil and gas sales, these expenses increased to 12.2% for the nine months ended September 30, 2006 from 11.8% for the nine months ended September 30, 2005. As further discussed in Part I, Item 2 - Discontinued Operations, the I-E Partnership is in the process of selling an increased amount of the Partnership's properties as a result of the generally favorable current environment for oil and gas dispositions. It is anticipated that the Partnership will have lower oil and gas sales and lower production expenses with the sale of these properties. The Limited Partners have received cash distributions through September 30, 2006 totaling $78,642,552 or 187.96% of Limited Partners' capital contributions. I-F PARTNERSHIP THREE MONTHS ENDED SEPTEMBER 30, 2006 COMPARED TO THE THREE MONTHS ENDED SEPTEMBER 30, 2005. Three Months Ended September 30, -------------------------------- 2006 2005(a) -------- -------- Oil and gas sales $474,453 $534,840 Oil and gas production expenses $ 81,444 $105,645 Barrels produced 2,438 2,864 Mcf produced 43,406 44,763 Average price/Bbl $ 68.09 $ 58.38 Average price/Mcf $ 7.11 $ 8.21 (a) The foregoing chart and the following discussion contain amounts for the year 2005 which have been restated to -46- reflect the Partnership's assets held for sale as discontinued operations. See Part I, Item 2 - Discontinued Operations for more information about these discontinued operations. As shown in the table above, total oil and gas sales decreased $60,000 (11.3%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. Of this decrease (i) $25,000 and $11,000 were related to decreases in volumes of oil and gas sold and (ii) $48,000 was related to a decrease in the average price of gas sold. These decreases were partially offset by an increase of $24,000 related to an increase in the average price of oil sold. Volumes of oil and gas sold decreased 426 barrels and 1,357 Mcf for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. The decreases in volumes of oil and gas sold were primarily due to normal declines in production. The decreases in volumes of gas sold was partially offset by (i) the successful completion of two wells during mid 2006 and (ii) an increase in the I-F Partnership's revenue interest on another well during the three months ended September 30, 2006. Oil and gas production expenses (including lease operating expenses and production taxes) decreased $24,000 (22.9%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. This decrease was primarily due to (i) the receipt of an $81,000 lease operating expense credit resulting from the settlement of a class action lawsuit on several wells during the three months ended September 30, 2006 and (ii) a decrease in production taxes associated with the decrease in oil and gas sales. These decreases were partially offset by workover expenses incurred on several wells during the three months ended September 30, 2006. As of the date of this Quarterly Report, management anticipates workover costs remaining at or increasing above 2006 levels due to the increased cost to perform a workover and the age of the wellbores. As a percentage of oil and gas sales, these expenses decreased to 17.2% for the three months ended September 30, 2006 from 19.8% for the three months ended September 30, 2005, primarily due to the dollar decrease in production expenses. DD&A of oil and gas properties decreased $18,000 (46.4%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. This decrease was primarily due to (i) several wells being fully depleted during 2005 due to their lack of remaining reserves and (ii) the decreases in volumes of oil and gas sold. As a percentage of oil and gas sales, this expense decreased to 4.4% for the three months ended September 30, 2006 from 7.2% for the three months ended September 30, 2005, primarily due to the dollar decrease in DD&A. -47- The I-F Partnership recognized a non-cash charge against earnings of $21,000 during the three months ended September 30, 2006. This charge was related to the decline in oil and gas prices used to determine recoverability of oil and gas reserves at September 30, 2006. No such charge was incurred during the three months ended September 30, 2005. General and administrative expenses decreased $1,000 (1.5%) for the three months ended September 30, 2006 as compared to the three months ended September 30, 2005. As a percentage of oil and gas sales, these expenses increased to 8.8% for the three months ended September 30, 2006 from 7.9% for the three months ended September 30, 2005, primarily due to the decrease in oil and gas sales. As further discussed in Part I, Item 2 - Discontinued Operations, the I-F Partnership is in the process of selling an increased amount of the Partnership's properties as a result of the generally favorable current environment for oil and gas dispositions. It is anticipated that the Partnership will have lower oil and gas sales and lower production expenses with the sale of these properties. NINE MONTHS ENDED SEPTEMBER 30, 2006 COMPARED TO THE NINE MONTHS ENDED SEPTEMBER 30, 2005. Nine Months Ended September 30, ------------------------------- 2006 2005(a) ---------- ---------- Oil and gas sales $1,362,870 $1,396,681 Oil and gas production expenses $ 336,280 $ 257,319 Barrels produced 7,651 8,071 Mcf produced 125,652 140,037 Average price/Bbl $ 64.39 $ 52.38 Average price/Mcf $ 6.93 $ 6.95 (a) The foregoing chart and the following discussion contain amounts for the year 2005 which have been restated to reflect the Partnership's assets held for sale as discontinued operations. See Part I, Item 2 - Discontinued Operations for more information about these discontinued operations. As shown in the table above, total oil and gas sales decreased $34,000 (2.4%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. Of this decrease (i) $22,000 and $100,000 were related to decreases in volumes of oil and gas sold and (ii) $4,000 was related to a decrease in the average price of gas sold. These decreases were partially offset by an increase of $92,000 related to an increase in the average price of oil sold. -48- Volumes of oil and gas sold decreased 420 barrels and 14,385 Mcf for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. The decrease in volumes of oil sold was primarily due to normal declines in production. This decrease was partially offset by (i) a negative prior period volume adjustment made by the operator on one significant well during the nine months ended September 30, 2005 and (ii) increases in production on two significant wells following their successful workovers during late 2005. The decrease in volumes of gas sold was primarily due to (i) normal declines in production and (ii) positive prior period volume adjustments made by the operators on several wells during the nine months ended September 30, 2005. These decreases were partially offset by (i) the successful completion of two significant wells during mid 2006 and (ii) an increase in the I-F Partnership's revenue interest on another well during the nine months ended September 30, 2006. Oil and gas production expenses (including lease operating expenses and production taxes) increased $79,000 (30.7%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. This increase was primarily due to (i) abandonment expenses incurred on two significant wells during the nine months ended September 30, 2006, (ii) a reversal during the nine months ended September 30, 2005 of $62,000 of a charge previously accrued for a judgment, and (iii) workover expenses incurred on several wells during the nine months ended September 30, 2006. As of the date of this Quarterly Report, management anticipates workover costs remaining at or increasing above 2006 levels due to the increased cost to perform a workover and the age of the wellbores. These increases were partially offset by the receipt of an $81,000 lease operating expense credit resulting from the settlement of a class action lawsuit on several wells during the nine months ended September 30, 2006. As a percentage of oil and gas sales, these expenses increased to 24.7% for the nine months ended September 30, 2006 from 18.4% for the nine months ended September 30, 2005, primarily due to the dollar increase in production expenses. DD&A of oil and gas properties decreased $9,000 (14.5%) for the nine months ended September 30, 2006 as compared to the nine months ended September 30, 2005. This decrease was primarily due to (i) several wells being fully depleted during 2005 due to their lack of remaining reserves and (ii) the decreases in volumes of oil and gas sold. The decreases in DD&A were partially offset by downward revisions in the estimates of remaining oil and gas reserves since September 30, 2005. As a percentage of oil and gas sales, this expense decreased to 3.7% for the nine months ended September 30, 2006 from 4.2% for the nine months ended September 30, 2005, primarily due to the dollar decrease in DD&A. -49- The I-F Partnership recognized a non-cash charge against earnings of $21,000 during the nine months ended September 30, 2006. This charge was related to the decline in oil and gas prices used to determine recoverability of oil and gas reserves at September 30, 2006. No such charge was incurred during the nine months ended September 30, 2005. General and administrative expenses remained relatively constant for the nine months ended September 30, 2006 and 2005. As a percentage of oil and gas sales, these expenses increased to 11.1% for the nine months ended September 30, 2006 from 10.7% for the nine months ended September 30, 2005. As further discussed in Part I, Item 2 - Discontinued Operations, the I-F Partnership is in the process of selling an increased amount of the Partnership's properties as a result of the generally favorable current environment for oil and gas dispositions. It is anticipated that the Partnership will have lower oil and gas sales and lower production expenses with the sale of these properties. The Limited Partners have received cash distributions through September 30, 2006 totaling $24,770,664 or 172.97% of Limited Partners' capital contributions. -50- ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK The Partnerships do not hold any market risk sensitive instruments. ITEM 4. CONTROLS AND PROCEDURES As of the end of this period covered by this report, the principal executive officer and principal financial officer conducted an evaluation of the Partnerships' disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities and Exchange Act of 1934). Based on this evaluation, such officers concluded that the Partnerships' disclosure controls and procedures are effective to ensure that information required to be disclosed by the Partnerships in reports filed under the Exchange Act is recorded, processed, summarized, and reported accurately and within the time periods specified in the Securities and Exchange Commission rules and forms. -51- PART II. OTHER INFORMATION ITEM 6. EXHIBITS 31.1 Certification by Dennis R. Neill required by Rule 13a-14(a)/15d-14(a) for the I-D Partnership. 31.2 Certification by Craig D. Loseke required by Rule 13a-14(a)/15d-14(a) for the I-D Partnership. 31.3 Certification by Dennis R. Neill required by Rule 13a-14(a)/15d-14(a) for the I-E Partnership. 31.4 Certification by Craig D. Loseke required by Rule 13a-14(a)/15d-14(a) for the I-E Partnership. 31.5 Certification by Dennis R. Neill required by Rule 13a-14(a)/15d-14(a) for the I-F Partnership. 31.6 Certification by Craig D. Loseke required by Rule 13a-14(a)/15d-14(a) for the I-F Partnership. 32.1 Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 for the I-D Partnership. 32.2 Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 for the I-E Partnership. 32.3 Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 for the I-F Partnership. -52- SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-D GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-E GEODYNE ENERGY INCOME LIMITED PARTNERSHIP I-F (Registrant) BY: GEODYNE RESOURCES, INC. General Partner Date: November 20, 2006 By: /s/Dennis R. Neill -------------------------------- (Signature) Dennis R. Neill President Date: November 20, 2006 By: /s/Craig D. Loseke -------------------------------- (Signature) Craig D. Loseke Chief Accounting Officer -53- INDEX TO EXHIBITS ----------------- Exh. No. Exhibit - ---- ------- 31.1 Certification by Dennis R. Neill required by Rule 13a-14(a)/15d-14(a) for the Geodyne Energy Income Limited Partnership I-D. 31.2 Certification by Craig D. Loseke required by Rule 13a-14(a)/15d-14(a) for the Geodyne Energy Income Limited Partnership I-D. 31.3 Certification by Dennis R. Neill required by Rule 13a-14(a)/15d-14(a) for the Geodyne Energy Income Limited Partnership I-E. 31.4 Certification by Craig D. Loseke required by Rule 13a-14(a)/15d-14(a) for the Geodyne Energy Income Limited Partnership I-E. 31.5 Certification by Dennis R. Neill required by Rule 13a-14(a)/15d-14(a) for the Geodyne Energy Income Limited Partnership I-F. 31.6 Certification by Craig D. Loseke required by Rule 13a-14(a)/15d-14(a) for the Geodyne Energy Income Limited Partnership I-F. 32.1 Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 for the Geodyne Energy Income Limited Partnership I-D. 32.2 Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 for the Geodyne Energy Income Limited Partnership I-E. 32.3 Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 for the Geodyne Energy Income Limited Partnership I-F. -54-