| 513797 | Sep 21, 2001 | Sep 21, 2001 | First Permian, L.L.C. | Gaines | Rudd #2 | 7,350 | 16535791 |
| 512989 | Sep 17, 2001 | Sep 17, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1051 | 3,250 | 33534238 |
| 513003 | Aug 30, 2001 | Aug 30, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #852W | 3,250 | 33534251 |
| 513012 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #2406W | 3,250 | 33534260 |
| 513011 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #2407 | 3,250 | 33534259 |
| 513010 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1205W | 3,250 | 33534258 |
| 513009 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #2712 | 3,250 | 33534257 |
| 513008 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1316W | 3,250 | 33534256 |
| 513007 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #2711 W | 3,250 | 33534255 |
| 513006 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1314 | 3,250 | 33534254 |
| 513005 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1056W | 3,250 | 33534253 |
| 513004 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1060W | 3,250 | 33534252 |
| 513002 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #853W | 3,250 | 33534250 |
| 513001 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #854 | 3,250 | 33534249 |
| 513000 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #859W | 3,250 | 33534248 |
| 512999 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #860W | 3,250 | 33534247 |
| 512998 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #862 | 3,250 | 33534246 |
| 512997 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #863 | 3,250 | 33534245 |
| 512996 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #864 | 3,250 | 33534244 |
| 512995 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #865W | 3,250 | 33534338 |
| 512994 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #726 | 3,250 | 33534242 |
| 512993 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #727W | 3,250 | 33534241 |
| 512992 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1206W | 3,250 | 33534240 |
| 512991 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #2408W | 3,250 | 33534239 |
| 512990 | Aug 29, 2001 | Aug 29, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1204 | 3,250 | 33534261 |
| 511749 | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #105 | 7,350 | 16535780 |
| 511749Amendment | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #105 | 7,350 | 16535780 |
| 511748 | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #213 | 7,350 | 16535779 |
| 511747 | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #409 | 7,350 | 16535778 |
| 511746 | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #805 | 7,350 | 16535777 |
| 511744 | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #1515 | 7,350 | 16535776 |
| 511742 | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #2505 | 7,350 | 16535775 |
| 511740 | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #3543 | 7,350 | 16535774 |
| 511738 | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #3546 | 7,350 | 16535773 |
| 511734 | Jul 27, 2001 | Jul 27, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #3547 | 7,350 | 16535772 |
| 511652 | Jul 20, 2001 | Jul 20, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #3544 | 7,350 | 16535771 |
| 511651 | Jul 20, 2001 | Jul 20, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #3545 | 7,350 | 16535770 |
| 511101 | Jul 11, 2001 | Jul 11, 2001 | First Permian, L.L.C. | Ector | East Penwell/San Andres/Unit #1713 | 4,000 | 13538120 |
| 511100 | Jul 11, 2001 | Jul 11, 2001 | First Permian, L.L.C. | Ector | East Penwell/San Andres/Unit #1813 | 4,000 | 13538119 |
| 511099 | Jul 11, 2001 | Jul 11, 2001 | First Permian, L.L.C. | Ector | East Penwell/San Andres/Unit #1001 | 4,000 | 13505059 |
| 511098 | Jul 11, 2001 | Jul 11, 2001 | First Permian, L.L.C. | Ector | East Penwell/San Andres/Unit #1152 | 4,000 | 13535236 |
| 508711 | Jun 4, 2001 | Jun 4, 2001 | First Permian, L.L.C. | Cochran | Whiteface Unit #108H | 5,000 | 07930867 |
| 508710 | Jun 4, 2001 | Jun 4, 2001 | First Permian, L.L.C. | Cochran | Whiteface Unit #174H | 5,000 | 07932809 |
| 509573 | May 30, 2001 | May 30, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #2113 | 7,350 | 16535753 |
| 509572 | May 30, 2001 | May 30, 2001 | First Permian, L.L.C. | Gaines | North Robertson Unit #408 | 7,350 | 16535752 |
| 506437 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1405W | 3,250 | 33534233 |
| 506436 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1404W | 3,250 | 33534232 |
| 506434 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1318 | 3,250 | 33534231 |
| 506433 | Mar 19, 2001 | Mar 19, 2001 | Energen Resources Corporation | Mitchell | Westbrook Southeast Unit #1067W | 3,250 | 33534230 |
| 506432 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1066W | 3,250 | 33534229 |
| 506431 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1065W | 3,250 | 33534228 |
| 506430 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1064 | 3,250 | 33534227 |
| 506429 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1063 | 3,250 | 33534226 |
| 506428 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1062 | 3,250 | 33534216 |
| 506427 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1061 | 3,250 | 33534225 |
| 506426 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #3705 | 3,250 | 33534224 |
| 506425 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #843W | 3,250 | 33534223 |
| 506424 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1914W | 3,250 | 33534222 |
| 506423 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1856W | 3,250 | 33534221 |
| 506422 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1854W | 3,250 | 33534220 |
| 506421 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #725W | 3,250 | 33534219 |
| 506420 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #722W | 3,250 | 33534234 |
| 506419 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #539W | 3,250 | 33534218 |
| 506418 | Mar 19, 2001 | Mar 19, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #538W | 3,250 | 33534217 |
| 505604 | Feb 21, 2001 | Feb 21, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1857W | 3,250 | 33534215 |
| 505603 | Feb 21, 2001 | Feb 21, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #540W | 3,250 | 33534214 |
| 505118 | Feb 9, 2001 | Feb 9, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #720 | 3,250 | 33534213 |
| 505117 | Feb 9, 2001 | Feb 9, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #537 | 3,250 | 33534212 |
| 505116 | Feb 9, 2001 | Feb 9, 2001 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1858 | 3,250 | 33534211 |
| 503396 | Feb 5, 2001 | Feb 5, 2001 | First Permian, L.L.C. | Cochran | Whiteface Unit #97H | 5,000 | 07930452 |
| 503188 | Dec 20, 2000 | Dec 20, 2000 | First Permian, L.L.C. | Gaines | Rudd #1 | 7,350 | 16535664 |
| 498693 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #2309 | 3,200 | 33534184 |
| 498692 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1050 | 3,200 | 33534183 |
| 498691 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #3514 | 3,200 | 33534182 |
| 498690 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #721 | 3,200 | 33534181 |
| 498689 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1052 | 3,200 | 33534180 |
| 498688 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1059W | 3,200 | 33534179 |
| 498686 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1058W | 3,200 | 33534178 |
| 498685 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1055W | 3,200 | 33534177 |
| 498684 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1054W | 3,200 | 33534176 |
| 498683 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1053W | 3,200 | 33534175 |
| 498682 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #1057 W | 3,200 | 33534174 |
| 498681 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #2310W | 3,200 | 33534173 |
| 498680 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #3515W | 3,200 | 33534172 |
| 498679 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #626W | 3,200 | 33534171 |
| 498678 | Aug 24, 2000 | Aug 24, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #723W | 3,200 | 33534170 |
| 497616 | Aug 15, 2000 | Aug 15, 2000 | First Permian, L.L.C. | Gaines | North Robertson Unit #1010 | 7,350 | 16535587 |
| 497615 | Aug 15, 2000 | Aug 15, 2000 | First Permian, L.L.C. | Gaines | North Robertson Unit #2112 | 7,350 | 16535586 |
| 497614 | Aug 15, 2000 | Aug 15, 2000 | First Permian, L.L.C. | Gaines | North Robertson Unit #407 | 7,350 | 16535588 |
| 497611 | Jul 27, 2000 | Jul 27, 2000 | First Permian, L.L.C. | Ector | East Penwell/San Andres/Unit #1913W | 4,000 | 13530365 |
| 497607 | Jul 27, 2000 | Jul 27, 2000 | First Permian, L.L.C. | Gaines | North Robertson Unit #211 | 7,350 | 16535585 |
| 497605 | Jul 27, 2000 | Jul 27, 2000 | First Permian, L.L.C. | Gaines | North Robertson Unit #3542 | 7,350 | 16535584 |
| 497603 | Jul 27, 2000 | Jul 27, 2000 | First Permian, L.L.C. | Gaines | North Robertson Unit #3541 | 7,350 | 16535583 |
| 497602 | Jul 27, 2000 | Jul 27, 2000 | First Permian, L.L.C. | Gaines | North Robertson Unit #3540 | 7,350 | 16535582 |
| 497601 | Jul 27, 2000 | Jul 27, 2000 | First Permian, L.L.C. | Gaines | North Robertson Unit #212 | 7,350 | 16535581 |
| 497315 | Jul 21, 2000 | Jul 21, 2000 | First Permian, L.L.C. | Ector | East Penwell/San Andres/Unit #1315 | 3,800 | 13534602 |
| 496574 | Jun 28, 2000 | Jun 28, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #849 | 3,200 | 33534132 |
| 496573 | Jun 28, 2000 | Jun 28, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #850W | 3,200 | 33534133 |
| 496572 | Jun 28, 2000 | Jun 28, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #847 | 3,200 | 33534134 |
| 496571 | Jun 28, 2000 | Jun 28, 2000 | First Permian, L.L.C. | Mitchell | Westbrook Southeast Unit #851W | 3,200 | 33534130 |