| 606289 | Sep 14, 2005 | Sep 14, 2005 | Pioneer Natural Res. USA, Inc. | Flanagan "14" #4 | 9,600 | 17333168 |
| 606096 | Sep 13, 2005 | Sep 13, 2005 | Pioneer Natural Res. USA, Inc. | Houston, H. A. "A" #2 | 9,950 | 17333167 |
| 605253 | Aug 22, 2005 | Aug 22, 2005 | Endeavor Energy Resources L.P. | McDaniel "34" #2 | 12,000 | 17331488 |
| 604822 | Aug 12, 2005 | Aug 12, 2005 | Range Production Company | Edmondson A #1029 | 9,000 | 17333165 |
| 604821 | Aug 12, 2005 | Aug 12, 2005 | Range Production Company | Edmondson A #929 | 9,000 | 17333164 |
| 604609 | Aug 9, 2005 | Aug 9, 2005 | Henry Petroleum LP | Currie #3508 | 10,000 | 17333163 |
| 604607 | Aug 9, 2005 | Aug 9, 2005 | Henry Petroleum LP | Currie #2707 | 10,000 | 17333162 |
| 604223 | Aug 2, 2005 | Aug 2, 2005 | Pioneer Natural Res. USA, Inc. | Hutchison, W.A. "12" #14 | 8,200 | 17333160 |
| 604022 | Aug 2, 2005 | Aug 2, 2005 | Range Production Company | Edmondson A #1232 | 9,000 | 17333161 |
| 603903 | Jul 25, 2005 | Jul 25, 2005 | Range Production Company | Edmondson A #1131 | 9,000 | 17333159 |
| 603529 | Jul 15, 2005 | Jul 15, 2005 | Chesapeake Operating, Inc. | Grand Slam #1 | 10,098 | 17331616 |
| 603248 | Jul 13, 2005 | Jul 13, 2005 | Westar Energy, Inc. | Evans #3 | 10,500 | 17333158 |
| 602700 | Jun 30, 2005 | Jun 30, 2005 | Range Production Company | Allein #1622 | 8,540 | 17332251 |
| 602698 | Jun 30, 2005 | Jun 30, 2005 | Range Production Company | Allein A #627 | 8,600 | 17331001 |
| 601348 | May 27, 2005 | May 27, 2005 | Mulloy Operating, Inc. - | Rape, Mary #1 | 10,863 | 17331564 |
| 559646 | Apr 4, 2005 | Apr 4, 2005 | Range Production Company | Allein A #3828 | 8,650 | 17332289 |
| 559159 | Apr 4, 2005 | Apr 4, 2005 | Range Production Company | Grigsby A #411 | 8,700 | 17333157 |
| 559262 | Mar 23, 2005 | Mar 23, 2005 | Chevron U. S. A. Inc. | Sterling "W" Fee #3 | 8,080 | 17332339 |
| 559162 | Mar 18, 2005 | Mar 18, 2005 | Range Production Company | Glass, Frank 16 #5 | 8,700 | 17333156 |
| 559161 | Mar 18, 2005 | Mar 18, 2005 | Range Production Company | Grigsby "10" #2 | 8,500 | 17333155 |
| 558930 | Mar 16, 2005 | Mar 16, 2005 | Atropos Exploration Company | Corky Nix 15 #2 | 6,200 | 17333128 |
| 558930Amendment | Mar 16, 2005 | Mar 16, 2005 | Atropos Exploration Company | Corky Nix 15 #2 | 9,964 | 17333128 |
| 558574 | Mar 14, 2005 | Mar 14, 2005 | Northstar Operating Company | Barfield 8 -B- #1 | 6,370 | 17332014 |
| 558342 | Mar 2, 2005 | Mar 2, 2005 | Pioneer Natural Res. USA, Inc. | Houston, H. A. "A" #3 | 10,000 | 17333154 |
| 558341 | Mar 2, 2005 | Mar 2, 2005 | Pioneer Natural Res. USA, Inc. | Flanagan "14" #3 | 10,000 | 17333153 |
| 557472 | Feb 10, 2005 | Feb 10, 2005 | Pioneer Natural Res. USA, Inc. | Fischer "10" #3 | 9,500 | 17333152 |
| 555625 | Feb 1, 2005 | Feb 1, 2005 | Pioneer Natural Res. USA, Inc. | Priddy #5 | 9,500 | 17333149 |
| 556764 | Jan 28, 2005 | Jan 28, 2005 | Thompson, J. Cleo | Houston 14 #1 | 11,200 | 17333151 |
| 556473 | Jan 21, 2005 | Jan 21, 2005 | Endeavor Energy Resources L.P. | Pieper, Alma "35" #1 | 11,000 | 17333036 |
| 556250 | Jan 18, 2005 | Jan 18, 2005 | Atropos Exploration Company | Corky Nix 15 #3 | 7,700 | 17333150 |
| 556250Amendment | Jan 18, 2005 | Jan 18, 2005 | Atropos Exploration Company | Corky Nix 15 #3 | 7,700 | 17333150 |
| 556250Amendment | Jan 18, 2005 | Jan 18, 2005 | Atropos Production Corporation | Corky Nix 15 #3 | 7,700 | 17333150 |
| 554612 | Jan 6, 2005 | Jan 6, 2005 | Pioneer Natural Res. USA, Inc. | Stuard A #2 | 9,500 | 17333145 |
| 555512 | Jan 4, 2005 | Jan 4, 2005 | Pioneer Natural Res. USA, Inc. | Priddy #4 | 9,500 | 17333148 |
| 555508 | Jan 4, 2005 | Jan 4, 2005 | Pioneer Natural Res. USA, Inc. | Priddy #3 | 9,500 | 17333147 |
| 555169 | Jan 4, 2005 | Jan 4, 2005 | Richmond Drilling Company, Inc. | Wrage #2 | 8,500 | 17333146 |
| 553806 | Dec 22, 2004 | Dec 22, 2004 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1494 A | 8,700 | 17333143 |
| 554543 | Dec 7, 2004 | Dec 7, 2004 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #643 A | 8,700 | 17333144 |
| 554213 | Dec 3, 2004 | Dec 3, 2004 | Chevron U. S. A. Inc. | Glasscock 'S' Fee #4 | 8,585 | 17332219 |
| 553193 | Nov 4, 2004 | Nov 4, 2004 | Endeavor Energy Resources L.P. | Earhart "34" #1 | 12,000 | 17333142 |
| 553193Amendment | Nov 4, 2004 | Nov 4, 2004 | Endeavor Energy Resources L.P. | Earhart "34" #1 | 12,000 | 17333142 |
| 552250 | Oct 14, 2004 | Oct 14, 2004 | Endeavor Energy Resources L.P. | Bryfar #1D | 11,000 | 17332828 |
| 552099 | Oct 12, 2004 | Oct 12, 2004 | Chevron U. S. A. Inc. | Glasscock "S" Fee #6 | 8,655 | 17332217 |
| 552098 | Oct 12, 2004 | Oct 12, 2004 | Chevron U. S. A. Inc. | Glasscock "S" Fee #12 | 8,575 | 17332380 |
| 548888 | Sep 28, 2004 | Sep 28, 2004 | Endeavor Energy Resources L.P. | McDaniel Brothers "34" #3 | 12,000 | 17333134 |
| 548888Amendment | Sep 28, 2004 | Sep 28, 2004 | Endeavor Energy Resources L.P. | McDaniel "34" #3 | 12,000 | 17333134 |
| 548888Amendment | Sep 28, 2004 | Sep 28, 2004 | Endeavor Energy Resources L.P. | McDaniel Brothers "34" #3 | 12,000 | 17333134 |
| 548888Amendment | Sep 28, 2004 | Sep 28, 2004 | Endeavor Energy Resources L.P. | McDaniel Brothers "34" #3 | 12,000 | 17333134 |
| 548888Amendment | Sep 28, 2004 | Sep 28, 2004 | Endeavor Energy Resources L.P. | McDaniel Brothers "34" #3 | 12,000 | 17333134 |
| 550863 | Sep 15, 2004 | Sep 15, 2004 | Elita, Inc. | Bryfar #1D | 11,000 | 17332828 |
| 550221 | Sep 10, 2004 | Sep 10, 2004 | Discovery Operating, Inc. | Cooper 36 #1 | 8,200 | 17333140 |
| 550681 | Sep 8, 2004 | Sep 8, 2004 | Sharp Image Energy, Inc. | Glass #1 | 8,400 | 17333141 |
| 547548 | Sep 1, 2004 | Sep 1, 2004 | Purvis Operating Co. | Stella #1 | 10,400 | 17332093 |
| 548855 | Aug 31, 2004 | Aug 31, 2004 | Arkland Producing Co., Inc. | Barfield 5 "A" #1 | 8,360 | 17331613 |
| 550142 | Aug 26, 2004 | Aug 26, 2004 | Mulloy Operating, Inc. - | TXL "25" #1 | 11,700 | 17333139 |
| 550045 | Aug 25, 2004 | Aug 25, 2004 | Discovery Operating, Inc. | Cooper 35 #1 | 8,300 | 17333138 |
| 549285 | Aug 18, 2004 | Aug 18, 2004 | Nadel and Gussman Permian,l.l.c. | Couey #2 | 8,800 | 17333137 |
| 548968 | Aug 2, 2004 | Aug 2, 2004 | Range Production Company | Grigsby, Mattie #7 | 9,000 | 17333135 |
| 548967 | Aug 2, 2004 | Aug 2, 2004 | Range Production Company | Edmondson A #829 | 9,000 | 17333136 |
| 548668 | Jul 27, 2004 | Jul 27, 2004 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1493A | 8,300 | 17333133 |
| 548499 | Jul 22, 2004 | Jul 22, 2004 | Thompson, J. Cleo | Neste Houston 14 #1 | 11,200 | 17332005 |
| 548187 | Jul 15, 2004 | Jul 15, 2004 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1109A | 8,600 | 17333132 |
| 546751 | Jun 14, 2004 | Jun 14, 2004 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1446A | 8,290 | 17333131 |
| 546639 | Jun 8, 2004 | Jun 8, 2004 | Pioneer Natural Res. USA, Inc. | Couey "A" #4 | 8,400 | 17333130 |
| 546464 | Jun 4, 2004 | Jun 4, 2004 | Chevron U. S. A. Inc. | Glasscock 'V' Fee #5 | 7,930 | 17332226 |
| 546445 | Jun 3, 2004 | Jun 3, 2004 | Pioneer Natural Res. USA, Inc. | Clark C #8 | 9,700 | 17333129 |
| 546290 | May 28, 2004 | May 28, 2004 | Royalty Land & Dev. Co., Inc. | Blalock, Lois #1 | 11,120 | 17331107 |
| 545790 | May 20, 2004 | May 20, 2004 | Atropos Exploration Company | Corky Nix 15 #2 | 10,500 | 17333128 |
| 544222 | Apr 8, 2004 | Apr 8, 2004 | Pioneer Natural Res. USA, Inc. | Priddy #2 | 9,500 | 17333127 |
| 543368 | Mar 17, 2004 | Mar 17, 2004 | Energen Resources Corporation | Daniel "7" #1 | 11,000 | 17333126 |
| 539566 | Dec 12, 2003 | Dec 12, 2003 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #C112A | 8,500 | 17333125 |
| 539152 | Dec 2, 2003 | Dec 2, 2003 | Energen Resources Corporation | Daniel Unit "3" #1 | 10,000 | 17333094 |
| 539152Amendment | Dec 2, 2003 | Dec 2, 2003 | Energen Resources Corporation | Daniel Unit "3" #1 | 11,000 | 17333094 |
| 539151 | Dec 2, 2003 | Dec 2, 2003 | Energen Resources Corporation | Daniel Unit #2 #1 | 11,000 | 17332044 |
| 539015 | Nov 25, 2003 | Nov 25, 2003 | Energen Resources Corporation | Thomason "D" #2 | 11,000 | 17333124 |
| 537536 | Nov 19, 2003 | Nov 19, 2003 | Sharp Image Energy, Inc. | Schafer #1 | 10,200 | 17333122 |
| 538097 | Oct 31, 2003 | Oct 31, 2003 | Energen Resources Corporation | Jurecek -C- #1 | 11,000 | 17332109 |
| 537613 | Oct 21, 2003 | Oct 21, 2003 | Chevron U. S. A. Inc. | Glasscock 'M' #2 | 11,150 | 17332577 |
| 537465 | Oct 16, 2003 | Oct 16, 2003 | Txu Lone Star Pipeline | GB X-285 #285 | 400 | 17333123 |
| 536860 | Sep 29, 2003 | Sep 29, 2003 | Range Production Company | Brunson "18" #1 | 9,000 | 17333121 |
| 536720 | Sep 25, 2003 | Sep 25, 2003 | Range Production Company | Brunson "18" #2 | 9,000 | 17333120 |
| 536453 | Sep 23, 2003 | Sep 23, 2003 | Atropos Exploration Company | Cookbooks 15 #1 | 11,000 | 17333119 |
| 534051 | Jul 14, 2003 | Jul 14, 2003 | Range Production Company | Brunson "19A" #1 | 9,000 | 17333118 |
| 533680 | Jul 2, 2003 | Jul 2, 2003 | Endeavor Energy Resources L.P. | Hubbard "18-B" #2 | 11,000 | 17333117 |
| 533715 | Jul 1, 2003 | Jul 1, 2003 | Anadarko Petroleum Corp. | Dooley, B. F. #1 | 9,660 | 17330966 |
| 533469 | Jun 24, 2003 | Jun 24, 2003 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #145A | 8,650 | 17333116 |
| 533139 | Jun 17, 2003 | Jun 17, 2003 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #143A | 8,650 | 17333115 |
| 533102 | Jun 16, 2003 | Jun 16, 2003 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #142A | 8,650 | 17333114 |
| 533102Amendment | Jun 16, 2003 | Jun 16, 2003 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #142A | 8,650 | 17333114 |
| 533099 | Jun 16, 2003 | Jun 16, 2003 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #141A | 8,650 | 17333113 |
| 532834 | Jun 11, 2003 | Jun 11, 2003 | Endeavor Energy Resources L.P. | Bodine "19" #4 | 11,000 | 17333112 |
| 531237 | Jun 5, 2003 | Jun 5, 2003 | Pioneer Natural Res. USA, Inc. | Wrage-Hendrickson #11 | 8,600 | 17333110 |
| 532181 | May 29, 2003 | May 29, 2003 | Endeavor Energy Resources L.P. | Hubbard "18-B" #1 | 12,000 | 17333111 |
| 531294 | May 1, 2003 | May 1, 2003 | Chevron U. S. A. Inc. | Glasscock 'P' Fee #1 | 11,000 | 17333012 |
| 530568 | Apr 30, 2003 | Apr 30, 2003 | Pioneer Natural Res. USA, Inc. | Wrage-Hendrickson "A" #10 | 8,600 | 17333109 |
| 529522 | Apr 8, 2003 | Apr 8, 2003 | Cobra Oil & Gas Corporation | Hillger-Kolb Unit #3 | 8,000 | 17333108 |
| 526682 | Mar 18, 2003 | Mar 18, 2003 | Energen Resources Corporation | Daniel #4 | 10,730 | 17333076 |
| 528189 | Feb 14, 2003 | Feb 14, 2003 | WTG Exploration | Adcock, Helen Zant #1 | 11,108 | 17331846 |
| 528217 | Feb 10, 2003 | Feb 10, 2003 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #1445A | 8,410 | 17333107 |
| 527871 | Jan 30, 2003 | Jan 30, 2003 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #136A | 8,640 | 17333106 |