| 504485 | Jan 24, 2001 | Jan 24, 2001 | Harken Exploration Company | Hutchinson | Herring "a" TR 2 #119 | 3,500 | 23332919 |
| 503694 | Jan 5, 2001 | Jan 5, 2001 | Harken Exploration Company | Hutchinson | Herring "a" TR 2 #117 | 3,500 | 23332915 |
| 503693 | Jan 5, 2001 | Jan 5, 2001 | Harken Exploration Company | Hutchinson | Herring "a" TR 2 #118 | 3,500 | 23332914 |
| 503692 | Jan 5, 2001 | Jan 5, 2001 | Harken Exploration Company | Hutchinson | Carver, H. W. #16 | 3,500 | 23332913 |
| 503691 | Jan 5, 2001 | Jan 5, 2001 | Harken Exploration Company | Hutchinson | Carver Area Waterflood 2 #39 | 3,500 | 23332912 |
| 455251 | Nov 18, 1996 | Nov 18, 1996 | Harken Exploration Company | Hutchinson | Yake "B" #7 | 3,061 | 23331136 |
| 394648 | Mar 25, 1992 | Mar 25, 1992 | Harken Exploration Company | Jones | Allen #1 | 5,388 | 25330991 |
| 395483 | Jan 13, 1992 | Jan 13, 1992 | Harken Exploration Company | Stonewall | Wooldridge #1 | 6,000 | 43332719 |
| 394628 | Dec 3, 1991 | Dec 3, 1991 | Harken Exploration Company | Carson | Winters, John T. #4 | 3,500 | 06531947 |
| 394627 | Dec 3, 1991 | Dec 3, 1991 | Harken Exploration Company | Carson | Winters, John T. #3 | 3,500 | 06531946 |
| 394415 | Nov 25, 1991 | Nov 25, 1991 | Harken Exploration Company | Lipscomb | Dorsey #1852 | 11,600 | 29531969 |
| 393642 | Nov 5, 1991 | Nov 5, 1991 | Harken Exploration Company | Ochiltree | Hungate #1001 | 7,700 | 35731979 |
| 391914 | Sep 26, 1991 | Sep 26, 1991 | Harken Exploration Company | Taylor | Four Square Gospel #1 | 4,597 | 44100496 |
| 390756 | Aug 9, 1991 | Aug 9, 1991 | Harken Exploration Company | Ochiltree | Davol 10 #1172 | 8,300 | 35731535 |
| 389429 | Jul 8, 1991 | Jul 8, 1991 | Harken Exploration Company | Stonewall | Wooldridge #1 | 6,500 | 43332719 |
| 386355 | May 20, 1991 | May 20, 1991 | Harken Exploration Company | Hansford | Collard -25- #8703 | 7,700 | 19531126 |
| 385135 | Feb 26, 1991 | Feb 26, 1991 | Harken Exploration Company | Hansford | Bivins #8501 | 7,400 | 19531124 |
| 384485 | Feb 20, 1991 | Feb 20, 1991 | Harken Exploration Company | Oldham | Holt #1 | 7,800 | 35930278 |
| 383306 | Jan 14, 1991 | Jan 14, 1991 | Harken Exploration Company | Lavaca | Mullins, C.B. #1 | 9,950 | 28532097 |
| 382937 | Jan 4, 1991 | Jan 4, 1991 | Harken Exploration Company | Goliad | Meider #1 | 6,200 | 17532583 |
| 381671Amendment | Dec 7, 1990 | Dec 7, 1990 | Harken Exploration Company | Victoria | Johnston, R. J. #1 | 6,500 | 46932811 |
| 381531 | Dec 3, 1990 | Dec 3, 1990 | Harken Exploration Company | Victoria | Schmidt, A. #1 | 4,200 | 46932810 |
| 381529 | Dec 3, 1990 | Dec 3, 1990 | Harken Exploration Company | Victoria | Timme #1 | 4,200 | 46932809 |
| 379305 | Oct 19, 1990 | Oct 19, 1990 | Harken Exploration Company | Gray | Eakin #14 | 3,500 | 17932007 |
| 379296 | Oct 19, 1990 | Oct 19, 1990 | Harken Exploration Company | Gray | Eakin #18 | 3,500 | 17932005 |
| 379295 | Oct 19, 1990 | Oct 19, 1990 | Harken Exploration Company | Gray | Eakin #17 | 3,500 | 17932006 |
| 379294 | Oct 19, 1990 | Oct 19, 1990 | Harken Exploration Company | Gray | Eakin #16 | 3,500 | 17932004 |
| 379291 | Oct 19, 1990 | Oct 19, 1990 | Harken Exploration Company | Gray | Eakin #15 | 3,500 | 17932003 |
| 379290 | Oct 18, 1990 | Oct 18, 1990 | Harken Exploration Company | Gray | Eakin #13 | 3,500 | 17932002 |
| 379238 | Oct 10, 1990 | Oct 10, 1990 | Harken Exploration Company | Gray | Eakin #12 | 3,500 | 17932000 |
| 379237 | Oct 10, 1990 | Oct 10, 1990 | Harken Exploration Company | Gray | Eakin #11 | 3,500 | 17932001 |
| 375670 | Jul 27, 1990 | Jul 27, 1990 | Harken Exploration Company | Jones | Gilkeyson #1 | 5,377 | 25331089 |
| 370805 | Mar 15, 1990 | Mar 15, 1990 | Harken Exploration Company | Madison | Hoke Unit #2 | 10,000 | 31330679 |
| 367492 | Jan 16, 1990 | Jan 16, 1990 | Harken Exploration Company | Madison | McWhorter, E. L. #1 | 9,750 | 31330390 |
| 366536 | Nov 16, 1989 | Nov 16, 1989 | Harken Exploration Company | Gray | Brown #A 2 | 3,500 | 17931979 |
| 366535 | Nov 16, 1989 | Nov 16, 1989 | Harken Exploration Company | Gray | Covey #6 | 3,500 | 17931980 |
| 366533 | Nov 16, 1989 | Nov 16, 1989 | Harken Exploration Company | Gray | Eakin #7 | 3,500 | 17931975 |
| 366532 | Nov 16, 1989 | Nov 16, 1989 | Harken Exploration Company | Gray | Eakin #8 | 3,500 | 17931976 |
| 366531 | Nov 16, 1989 | Nov 16, 1989 | Harken Exploration Company | Gray | Eakin #10 | 3,500 | 17931977 |
| 366529 | Nov 16, 1989 | Nov 16, 1989 | Harken Exploration Company | Gray | Eakin #9 | 3,500 | 17931978 |
| 366529Amendment | Nov 16, 1989 | Nov 16, 1989 | Harken Exploration Company | Gray | Eakin #9 | 3,500 | 17931978 |
| 366142 | Nov 14, 1989 | Nov 14, 1989 | Harken Exploration Company | Stonewall | Miller #3 | 6,500 | 43332556 |
| 365972 | Nov 7, 1989 | Nov 7, 1989 | Harken Exploration Company | Gray | Eakin #6 | 3,500 | 17931973 |
| 365971 | Nov 7, 1989 | Nov 7, 1989 | Harken Exploration Company | Gray | Covey #5 | 3,500 | 17931972 |
| 365971Amendment | Nov 7, 1989 | Nov 7, 1989 | Harken Exploration Company | Gray | Covey #5 | 3,500 | 17931972 |
| 365953 | Nov 7, 1989 | Nov 7, 1989 | Harken Exploration Company | Gray | Eakin #5 | 3,500 | 17931971 |
| 365560 | Oct 26, 1989 | Oct 26, 1989 | Harken Exploration Company | Gray | Brown #A 1 | 3,500 | 17931970 |
| 365560Amendment | Oct 26, 1989 | Oct 26, 1989 | Harken Exploration Company | Gray | Brown #A 1 | 3,500 | 17931970 |
| 365143 | Oct 13, 1989 | Oct 13, 1989 | Harken Exploration Company | Gray | Brown #1 | 3,500 | 17931969 |
| 364448 | Sep 27, 1989 | Sep 27, 1989 | Harken Exploration Company | Gray | Eakin #2 | 3,500 | 17931967 |
| 364447 | Sep 27, 1989 | Sep 27, 1989 | Harken Exploration Company | Gray | Eakin #3 | 3,500 | 17931966 |
| 364447Amendment | Sep 27, 1989 | Sep 27, 1989 | Harken Exploration Company | Gray | Eakin #3 | 3,500 | 17931966 |
| 364446 | Sep 27, 1989 | Sep 27, 1989 | Harken Exploration Company | Gray | Eakin #4 | 3,500 | 17931965 |
| 363265Amendment | Aug 30, 1989 | Aug 30, 1989 | Harken Exploration Company | Hartley | Proctor #1 | 6,500 | 20530207 |
| 363265Amendment | Aug 30, 1989 | Aug 30, 1989 | Harken Exploration Company | Hartley | Proctor #1 | 6,500 | 20530207 |
| 361950 | Aug 2, 1989 | Aug 2, 1989 | Harken Exploration Company | Throckmorton | Lee -197- #1 | 5,100 | 44735010 |
| 361950Amendment | Aug 2, 1989 | Aug 2, 1989 | Harken Exploration Company | Throckmorton | Lee -197- #1 | 5,100 | 44735010 |
| 361329 | Jul 31, 1989 | Jul 31, 1989 | Harken Exploration Company | Jones | Noodle Creek Unit #701 | 5,361 | 25331937 |
| 361952 | Jul 27, 1989 | Jul 27, 1989 | Harken Exploration Company | Taylor | Irwin "A" #1 | 4,044 | 44133090 |
| 360406 | Jun 15, 1989 | Jun 15, 1989 | Harken Exploration Company | Gray | Covey #4 | 3,500 | 17931962 |
| 360361 | Jun 15, 1989 | Jun 15, 1989 | Harken Exploration Company | Throckmorton | Lee 192 #1 | 5,100 | 44734984 |
| 360115 | Jun 6, 1989 | Jun 6, 1989 | Harken Exploration Company | Gray | Weinheimer #1 | 3,500 | 17931959 |
| 360040 | Jun 5, 1989 | Jun 5, 1989 | Harken Exploration Company | Gray | Anderson, Clarence "A" #6 | 3,550 | 17931958 |
| 360039 | Jun 5, 1989 | Jun 5, 1989 | Harken Exploration Company | Gray | Covey #3 | 3,500 | 17931957 |
| 360038 | Jun 5, 1989 | Jun 5, 1989 | Harken Exploration Company | Gray | Covey #2 | 3,500 | 17931956 |
| 360037 | Jun 5, 1989 | Jun 5, 1989 | Harken Exploration Company | Gray | Eakin #1 | 3,500 | 17931955 |
| 359667 | Jun 2, 1989 | Jun 2, 1989 | Harken Exploration Company | Madison | Hensarling #5 | 10,000 | 31330670 |
| 359667Amendment | Jun 2, 1989 | Jun 2, 1989 | Harken Exploration Company | Madison | Hensarling #5 | 10,000 | 31330670 |
| 359432 | May 16, 1989 | May 16, 1989 | Harken Exploration Company | Gray | Covey #1 | 3,500 | 17931952 |
| 359431 | May 16, 1989 | May 16, 1989 | Harken Exploration Company | Gray | Anderson, Clarence "A" #7 | 3,550 | 17931951 |
| 357992 | Apr 13, 1989 | Apr 13, 1989 | Harken Exploration Company | Throckmorton | Lee Cattle Company #6A | 5,200 | 44734961 |
| 356096 | Mar 8, 1989 | Mar 8, 1989 | Harken Exploration Company | Gray | Anderson, Clarence "A" #4 | 3,550 | 17931946 |
| 355599 | Jan 31, 1989 | Jan 31, 1989 | Harken Exploration Company | Gray | Anderson, Clarence "B" #4 | 3,550 | 17931945 |
| 355598 | Jan 31, 1989 | Jan 31, 1989 | Harken Exploration Company | Gray | Anderson, Clarence #2 | 3,550 | 17931943 |
| 355597 | Jan 31, 1989 | Jan 31, 1989 | Harken Exploration Company | Gray | Anderson, Clarence "B" #3 | 3,550 | 17931944 |
| 355029 | Jan 11, 1989 | Jan 11, 1989 | Harken Exploration Company | Throckmorton | Lee Cattle Company #5A | 6,500 | 44734939 |