| 519675 | May 3, 2002 | May 3, 2002 | National Energy Group, Inc. | Orange | State Tract 9 #1 | 11,600 | 36130792 |
| 513400 | Sep 6, 2001 | Sep 6, 2001 | National Energy Group, Inc. | Orange | State Tract 8 #1 | 11,600 | 36130785 |
| 509654 | May 31, 2001 | May 31, 2001 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2710 | 6,100 | 13538085 |
| 509653 | May 31, 2001 | May 31, 2001 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2708 | 6,100 | 13538084 |
| 509652 | May 31, 2001 | May 31, 2001 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2619 | 6,100 | 13538083 |
| 505611 | Feb 21, 2001 | Feb 21, 2001 | National Energy Group, Inc. | Rusk | McHaney Gas Unit #2 | 10,750 | 40133087 |
| 505611Amendment | Feb 21, 2001 | Feb 21, 2001 | National Energy Group, Inc. | Rusk | McHaney Gas Unit #2 | 10,750 | 40133087 |
| 505611Amendment | Feb 21, 2001 | Feb 21, 2001 | National Energy Group, Inc. | Rusk | McHaney Gas Unit #2 | 10,750 | 40133087 |
| 505025 | Feb 7, 2001 | Feb 7, 2001 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2408 | 6,100 | 13537996 |
| 504180 | Jan 17, 2001 | Jan 17, 2001 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1726 | 6,100 | 13537975 |
| 504179 | Jan 17, 2001 | Jan 17, 2001 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1728 | 6,100 | 13537974 |
| 503966 | Jan 11, 2001 | Jan 11, 2001 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1727 | 6,100 | 13537968 |
| 503531 | Dec 29, 2000 | Dec 29, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1725 | 6,100 | 13537951 |
| 503530 | Dec 29, 2000 | Dec 29, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1723 | 6,100 | 13537949 |
| 503529 | Dec 29, 2000 | Dec 29, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1724 | 6,100 | 13537950 |
| 502659 | Dec 5, 2000 | Dec 5, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1721 | 6,100 | 13537943 |
| 502658 | Dec 5, 2000 | Dec 5, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1722 | 6,100 | 13537942 |
| 501852 | Nov 14, 2000 | Nov 14, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2618 | 6,100 | 13537925 |
| 501739 | Nov 14, 2000 | Nov 14, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2109 | 6,100 | 13537919 |
| 501738 | Nov 14, 2000 | Nov 14, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2110 | 6,100 | 13537918 |
| 501851 | Nov 10, 2000 | Nov 10, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #909 | 6,100 | 13537924 |
| 501850 | Nov 10, 2000 | Nov 10, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1720 | 6,100 | 13537923 |
| 500834 | Oct 17, 2000 | Oct 17, 2000 | National Energy Group, Inc. | Harrison | Mattie Dixon Estate Gas Unit #3 | 10,600 | 20332652 |
| 500009 | Sep 26, 2000 | Sep 26, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #512 | 6,100 | 13537883 |
| 500008 | Sep 26, 2000 | Sep 26, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #407 | 6,100 | 13537882 |
| 500007 | Sep 26, 2000 | Sep 26, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1008 | 6,100 | 13537881 |
| 499852 | Sep 21, 2000 | Sep 21, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #705 | 6,100 | 13537877 |
| 499303 | Sep 6, 2000 | Sep 6, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2808 | 6,100 | 13537874 |
| 499302 | Sep 6, 2000 | Sep 6, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2707 | 6,100 | 13537875 |
| 499041 | Aug 30, 2000 | Aug 30, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1106 | 6,100 | 13537871 |
| 498911 | Aug 25, 2000 | Aug 25, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1719 | 6,100 | 13537870 |
| 497507 | Jul 24, 2000 | Jul 24, 2000 | National Energy Group, Inc. | Harrison | Mary Louise Waldron GU #5 | 10,500 | 20332634 |
| 494845 | May 11, 2000 | May 11, 2000 | National Energy Group, Inc. | Ector | Golsmith Adobe Unit #406 | 6,100 | 13537826 |
| 494844 | May 11, 2000 | May 11, 2000 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #210 | 6,100 | 13537827 |
| 479116 | Aug 28, 1998 | Aug 28, 1998 | National Energy Group, Inc. | San Patricio | Dugat #1 | 12,024 | 40932502 |
| 479116Amendment | Aug 28, 1998 | Aug 28, 1998 | National Energy Group, Inc. | San Patricio | Dugat #1L | 12,024 | 40932502 |
| 474225 | Apr 28, 1998 | Apr 28, 1998 | National Energy Group, Inc. | Rusk | Gladney Gas Unit #7 | 7,230 | 40132713 |
| 473932 | Mar 4, 1998 | Mar 4, 1998 | National Energy Group, Inc. | Rusk | Shelton Unit #3 | 7,500 | 40132851 |
| 473183 | Feb 17, 1998 | Feb 17, 1998 | National Energy Group, Inc. | Rusk | Gladney Unit #8 | 7,500 | 40132843 |
| 471898 | Jan 13, 1998 | Jan 13, 1998 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3917 | 6,100 | 13537588 |
| 471897 | Jan 13, 1998 | Jan 13, 1998 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #4107 | 6,100 | 13537589 |
| 471896 | Jan 13, 1998 | Jan 13, 1998 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #4405 | 6,100 | 13538750 |
| 471895 | Jan 13, 1998 | Jan 13, 1998 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1405 | 6,100 | 13537591 |
| 471899 | Jan 8, 1998 | Jan 8, 1998 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #4106 | 6,100 | 13537587 |
| 471804 | Jan 2, 1998 | Jan 2, 1998 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3918 | 6,100 | 13537586 |
| 469053 | Oct 29, 1997 | Oct 29, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1717 | 6,100 | 13537557 |
| 469052 | Oct 29, 1997 | Oct 29, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1718 | 6,100 | 13537556 |
| 468991 | Oct 20, 1997 | Oct 20, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1716 | 6,100 | 13537555 |
| 468540 | Oct 8, 1997 | Oct 8, 1997 | National Energy Group, Inc. | Rusk | Shelton #2 | 10,500 | 40132786 |
| 465552 | Sep 30, 1997 | Sep 30, 1997 | National Energy Group, Inc. | Rusk | Gladney Gas Unit #4 | 10,500 | 40132557 |
| 465552Amendment | Sep 30, 1997 | Sep 30, 1997 | National Energy Group, Inc. | Rusk | Gladney #4 | 8,900 | 40132557 |
| 465552Amendment | Sep 30, 1997 | Sep 30, 1997 | National Energy Group, Inc. | Rusk | Gladney #4 | 8,900 | 40132557 |
| 468072 | Sep 26, 1997 | Sep 26, 1997 | National Energy Group, Inc. | Galveston | State Tract 50 #1 | 8,500 | 16731297 |
| 467071 | Sep 15, 1997 | Sep 15, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #4210 | 6,100 | 13537537 |
| 467068 | Sep 15, 1997 | Sep 15, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3712 | 6,100 | 13537535 |
| 467069 | Sep 11, 1997 | Sep 11, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #4209 | 6,100 | 13537536 |
| 467066 | Sep 4, 1997 | Sep 4, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3711 | 6,100 | 13537534 |
| 466675 | Aug 25, 1997 | Aug 25, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1206 | 6,100 | 13537532 |
| 466265 | Aug 14, 1997 | Aug 14, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1715 | 6,100 | 13537523 |
| 463637 | Jun 17, 1997 | Jun 17, 1997 | National Energy Group, Inc. | Harrison | Mattie Dixon Estate Gas Unit #2 | 10,500 | 20332453 |
| 463636 | Jun 17, 1997 | Jun 17, 1997 | National Energy Group, Inc. | Harrison | Carolyn W. Bell Gas Unit No. 1 #2 | 10,500 | 20332452 |
| 463566 | Jun 17, 1997 | Jun 17, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2007 | 6,100 | 13537485 |
| 462269 | Jun 9, 1997 | Jun 9, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #4806 | 6,100 | 13537435 |
| 462352 | May 19, 1997 | May 19, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1713 | 6,100 | 13537451 |
| 462345 | May 19, 1997 | May 19, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #1806 | 6,100 | 13537450 |
| 462344 | May 19, 1997 | May 19, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3916 | 6,100 | 13537449 |
| 461904 | May 7, 1997 | May 7, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #5007 | 6,100 | 13537419 |
| 461972 | May 6, 1997 | May 6, 1997 | National Energy Group, Inc. | Harrison | Rollie Sims Gas Unit #5 | 10,500 | 20332442 |
| 461478 | Apr 22, 1997 | Apr 22, 1997 | National Energy Group, Inc. | Rusk | Gladney Gas Unit #7 | 7,500 | 40132713 |
| 461478Amendment | Apr 22, 1997 | Apr 22, 1997 | National Energy Group, Inc. | Rusk | Gladney Gas Unit #7 | 7,500 | 40132713 |
| 459462 | Apr 16, 1997 | Apr 16, 1997 | National Energy Group, Inc. | Fayette | Dusek Unit #2 #4AH | 13,700 | 14932792 |
| 461157 | Apr 15, 1997 | Apr 15, 1997 | National Energy Group, Inc. | San Patricio | Lackey #1 | 12,000 | 40932521 |
| 459204 | Feb 26, 1997 | Feb 26, 1997 | National Energy Group, Inc. | Brazos-LB | State Tract 480-L #1 | 14,000 | 70430319 |
| 458854 | Feb 21, 1997 | Feb 21, 1997 | National Energy Group, Inc. | Rusk | Cherokee Water Company #7 | 10,500 | 40132704 |
| 458853 | Feb 20, 1997 | Feb 20, 1997 | National Energy Group, Inc. | Rusk | Gladney Gas Unit #6 | 10,500 | 40132703 |
| 455808 | Feb 13, 1997 | Feb 13, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #4805 | 6,100 | 13537382 |
| 455807 | Feb 13, 1997 | Feb 13, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #4908 | 6,100 | 13537383 |
| 458047 | Feb 5, 1997 | Feb 5, 1997 | National Energy Group, Inc. | Harrison | Rollie C. Sims Gas Unit #6 | 10,500 | 20332417 |
| 457104 | Jan 27, 1997 | Jan 27, 1997 | National Energy Group, Inc. | Fayette | Dusek Unit No. 1 #3AH | 11,044 | 14932755 |
| 457103 | Jan 14, 1997 | Jan 14, 1997 | National Energy Group, Inc. | Fayette | Dusek Unit No. 1 #5AH | 10,775 | 14932933 |
| 457005 | Jan 8, 1997 | Jan 8, 1997 | National Energy Group, Inc. | Harrison | Rollie Sims Gas Unit #7 | 10,500 | 20332410 |
| 456976 | Jan 7, 1997 | Jan 7, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3408 | 6,100 | 13537376 |
| 456975 | Jan 7, 1997 | Jan 7, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2205 | 6,100 | 13537375 |
| 456974 | Jan 7, 1997 | Jan 7, 1997 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3309 | 6,100 | 13537377 |
| 456158 | Dec 13, 1996 | Dec 13, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3811 | 6,100 | 13537368 |
| 456157 | Dec 13, 1996 | Dec 13, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3409 | 6,100 | 13537367 |
| 456156 | Dec 13, 1996 | Dec 13, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3407 | 6,100 | 13537366 |
| 456155 | Dec 13, 1996 | Dec 13, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3915 | 6,100 | 13537369 |
| 454908 | Nov 25, 1996 | Nov 25, 1996 | National Energy Group, Inc. | Harrison | Mary Louise Waldron Gas Unit #5 | 10,500 | 20332634 |
| 454909 | Nov 15, 1996 | Nov 15, 1996 | National Energy Group, Inc. | Harrison | Mary Louise Waldron Gas Unit #8 | 10,500 | 20332399 |
| 454900 | Nov 14, 1996 | Nov 14, 1996 | National Energy Group, Inc. | Harrison | Mary Louise Waldron Gas Unit #6 | 10,500 | 20332397 |
| 454530 | Nov 1, 1996 | Nov 1, 1996 | National Energy Group, Inc. | Harrison | Mary Louise Waldron Gas Unit #7 | 10,500 | 20332396 |
| 454264 | Oct 25, 1996 | Oct 25, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3405 | 6,100 | 13537308 |
| 454263 | Oct 24, 1996 | Oct 24, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3406 | 6,100 | 13537307 |
| 454262 | Oct 24, 1996 | Oct 24, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3307 | 6,100 | 13537306 |
| 452891 | Sep 30, 1996 | Sep 30, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3810 | 6,100 | 13537274 |
| 452892 | Sep 20, 1996 | Sep 20, 1996 | National Energy Group, Inc. | Mustang IS-SB | State Tract 895-S #1 | 18,000 | 60230176 |
| 452892Amendment | Sep 20, 1996 | Sep 20, 1996 | National Energy Group, Inc. | Mustang IS-SB | State Tract 895-S #1 | 18,000 | 60230176 |
| 452401 | Sep 16, 1996 | Sep 16, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #3809 | 6,100 | 13537265 |
| 452400 | Sep 16, 1996 | Sep 16, 1996 | National Energy Group, Inc. | Ector | Goldsmith Adobe Unit #2004 | 6,100 | 13537264 |