| 625190 | Aug 30, 2006 | Aug 30, 2006 | Pioneer Natural Res. USA, Inc. | Houston Ranch "12" #1 | 9,800 | 17333250 |
| 625190Amendment | Aug 30, 2006 | Aug 30, 2006 | Pioneer Natural Res. USA, Inc. | Houston Ranch "12" #1 | 9,875 | 17333250 |
| 625188 | Aug 30, 2006 | Aug 30, 2006 | Pioneer Natural Res. USA, Inc. | Jost #6 | 9,400 | 17333249 |
| 625188Amendment | Aug 30, 2006 | Aug 30, 2006 | Pioneer Natural Res. USA, Inc. | Jost #6 | 9,500 | 17333249 |
| 625187 | Aug 30, 2006 | Aug 30, 2006 | Pioneer Natural Res. USA, Inc. | Cheatham "13" #1 | 9,850 | 17333248 |
| 625187Amendment | Aug 30, 2006 | Aug 30, 2006 | Pioneer Natural Res. USA, Inc. | Cheatham "13" #1 | 9,875 | 17333248 |
| 625119 | Aug 29, 2006 | Aug 29, 2006 | Pioneer Natural Res. USA, Inc. | Cheatham #5 | 9,500 | 17333247 |
| 625118 | Aug 29, 2006 | Aug 29, 2006 | Pioneer Natural Res. USA, Inc. | Cheatham #3 | 9,500 | 17333246 |
| 625117 | Aug 29, 2006 | Aug 29, 2006 | Pioneer Natural Res. USA, Inc. | Cheatham #2 | 9,500 | 17333245 |
| 625116 | Aug 29, 2006 | Aug 29, 2006 | Pioneer Natural Res. USA, Inc. | Cheatham #1 | 9,500 | 17333244 |
| 625115 | Aug 29, 2006 | Aug 29, 2006 | Pioneer Natural Res. USA, Inc. | Newman "A" #1 | 10,850 | 17333243 |
| 624668 | Aug 24, 2006 | Aug 24, 2006 | Chevron U. S. A. Inc. | Glasscock V Fee #11 | 8,500 | 17332395 |
| 624661 | Aug 24, 2006 | Aug 24, 2006 | Chevron U. S. A. Inc. | Glasscock W Fee #5 | 8,590 | 17332257 |
| 624657 | Aug 24, 2006 | Aug 24, 2006 | Chevron U. S. A. Inc. | Glasscock S Fee #14 | 8,615 | 17332392 |
| 624305 | Aug 15, 2006 | Aug 15, 2006 | Range Production Company | Edmondson A #2431 | 9,000 | 17333242 |
| 622353 | Jul 12, 2006 | Jul 12, 2006 | Range Production Company | Edmondson #5 | 9,000 | 17333241 |
| 622351 | Jul 11, 2006 | Jul 11, 2006 | Range Production Company | Edmondson A #2320 | 9,000 | 17333240 |
| 622350 | Jul 11, 2006 | Jul 11, 2006 | Range Production Company | Edmondson A #2230 | 9,000 | 17333239 |
| 621807 | Jul 5, 2006 | Jul 5, 2006 | Merit Energy Company | Wrage-Hendrickson #6 | 8,608 | 17331476 |
| 621207 | Jun 19, 2006 | Jun 19, 2006 | Pioneer Natural Res. USA, Inc. | Lloyd #3 | 9,550 | 17333238 |
| 621206 | Jun 19, 2006 | Jun 19, 2006 | Pioneer Natural Res. USA, Inc. | Lloyd #2 | 9,550 | 17333237 |
| 621205 | Jun 19, 2006 | Jun 19, 2006 | Pioneer Natural Res. USA, Inc. | Lloyd #1 | 9,550 | 17333236 |
| 621197 | Jun 19, 2006 | Jun 19, 2006 | Pioneer Natural Res. USA, Inc. | Donelson #1 | 9,550 | 17333235 |
| 620618 | Jun 8, 2006 | Jun 8, 2006 | Pioneer Natural Res. USA, Inc. | Blewett #3 | 10,000 | 17333234 |
| 620542 | Jun 7, 2006 | Jun 7, 2006 | Pioneer Natural Res. USA, Inc. | Blewett #1 | 10,000 | 17333233 |
| 620094 | Jun 2, 2006 | Jun 2, 2006 | Geosurveys, Inc. | Sisters #1 | 8,500 | 17333232 |
| 619098 | May 18, 2006 | May 18, 2006 | Range Production Company | Edmondson -A- #5 | 9,000 | 17333229 |
| 619097 | May 18, 2006 | May 18, 2006 | Range Production Company | Edmondson A #2132 | 9,000 | 17333230 |
| 619096 | May 18, 2006 | May 18, 2006 | Range Production Company | Frank Glass 16 #6 | 8,700 | 17333231 |
| 618077 | May 18, 2006 | May 18, 2006 | Pioneer Natural Res. USA, Inc. | Lane, WH "42" #6 | 9,850 | 17333228 |
| 618075 | May 18, 2006 | May 18, 2006 | Pioneer Natural Res. USA, Inc. | Lane, WH "42" #5 | 9,850 | 17333227 |
| 616162 | May 17, 2006 | May 17, 2006 | Pioneer Natural Res. USA, Inc. | Lane, W. H. "37" #11 | 9,900 | 17333212 |
| 616163 | May 16, 2006 | May 16, 2006 | Pioneer Natural Res. USA, Inc. | Lane, W. H. "37" #12 | 9,900 | 17333213 |
| 616163Amendment | May 16, 2006 | May 16, 2006 | Pioneer Natural Res. USA, Inc. | Lane, W. H. "37" #12 | 9,900 | 17333213 |
| 617836 | May 15, 2006 | May 15, 2006 | Mariner Energy, Inc. | Glass #7TM | 9,000 | 17333226 |
| 614534 | May 8, 2006 | May 8, 2006 | Pioneer Natural Res. USA, Inc. | Driver, J.W. "13" #8 | 9,950 | 17333200 |
| 614532 | May 8, 2006 | May 8, 2006 | Pioneer Natural Res. USA, Inc. | Driver, J.W. "13" #7 | 9,950 | 17333199 |
| 614508 | May 8, 2006 | May 8, 2006 | Pioneer Natural Res. USA, Inc. | Schrock, W.M. "24" #10 | 9,950 | 17333198 |
| 617052 | May 1, 2006 | May 1, 2006 | Pioneer Natural Res. USA, Inc. | Black, SE "42" #6 | 9,850 | 17333225 |
| 614514 | May 1, 2006 | May 1, 2006 | Pioneer Natural Res. USA, Inc. | Schrock, W.M. "24" #12 | 9,950 | 17333197 |
| 614514Amendment | May 1, 2006 | May 1, 2006 | Pioneer Natural Res. USA, Inc. | Schrock, W.M. "24" #12 | 9,950 | 17333197 |
| 617051 | Apr 28, 2006 | Apr 28, 2006 | Pioneer Natural Res. USA, Inc. | Calverley, JB #16 | 9,850 | 17333224 |
| 617050 | Apr 28, 2006 | Apr 28, 2006 | Pioneer Natural Res. USA, Inc. | Calverley, JB #15 | 9,850 | 17333223 |
| 618264 | Apr 27, 2006 | Apr 27, 2006 | CJ Energy, LLC | Fannie Boyd #1SW | 4,950 | 17300770 |
| 614510 | Apr 21, 2006 | Apr 21, 2006 | Pioneer Natural Res. USA, Inc. | Schrock, W. M. "24" #11 | 9,950 | 17333196 |
| 616164 | Apr 19, 2006 | Apr 19, 2006 | Pioneer Natural Res. USA, Inc. | Lane, W. H. "37" #13 | 9,900 | 17333214 |
| 615911 | Apr 10, 2006 | Apr 10, 2006 | Pioneer Natural Res. USA, Inc. | Hubbard, O. J. #3 | 9,850 | 17333207 |
| 615910 | Apr 10, 2006 | Apr 10, 2006 | Pioneer Natural Res. USA, Inc. | Calverley, JB "32" #8 | 9,850 | 17333206 |
| 615909 | Apr 10, 2006 | Apr 10, 2006 | Pioneer Natural Res. USA, Inc. | Calverley, JB "32" #7 | 9,850 | 17333205 |
| 615907 | Apr 10, 2006 | Apr 10, 2006 | Pioneer Natural Res. USA, Inc. | Calverley, JB "32" #6 | 9,850 | 17333204 |
| 616911 | Apr 4, 2006 | Apr 4, 2006 | Gruy Petroleum Management Co. | Chriesman #3 | 8,950 | 17333222 |
| 616911Amendment | Apr 4, 2006 | Apr 4, 2006 | Cimarex Energy Co. of Colorado | Chriesman #3 | 8,950 | 17333222 |
| 616910 | Apr 4, 2006 | Apr 4, 2006 | Gruy Petroleum Management Co. | Chriesman -A- #6 | 8,950 | 17333221 |
| 616723 | Mar 30, 2006 | Mar 30, 2006 | Mariner Energy, Inc. | Hoelscher "A" #3TM | 9,000 | 17333219 |
| 616722 | Mar 30, 2006 | Mar 30, 2006 | Mariner Energy, Inc. | Hoelscher #2TM | 9,000 | 17333218 |
| 616718 | Mar 30, 2006 | Mar 30, 2006 | Mariner Energy, Inc. | Hoelscher, H. W. #2TM | 9,000 | 17333220 |
| 616718Amendment | Mar 30, 2006 | Mar 30, 2006 | Mariner Energy, Inc. | Hoelscher, H. W. #2TM | 9,000 | 17333220 |
| 616554 | Mar 29, 2006 | Mar 29, 2006 | Range Production Company | Edmondson A #1729 | 9,000 | 17333217 |
| 616553 | Mar 28, 2006 | Mar 28, 2006 | Range Production Company | Edmondson A #2029 | 9,000 | 17333216 |
| 616552 | Mar 28, 2006 | Mar 28, 2006 | Range Production Company | Edmondson A #1920 | 9,000 | 17333215 |
| 615921 | Mar 16, 2006 | Mar 16, 2006 | Pioneer Natural Res. USA, Inc. | Flanagan '14' #8 | 9,525 | 17333211 |
| 615921Amendment | Mar 16, 2006 | Mar 16, 2006 | Pioneer Natural Res. USA, Inc. | Flanagan '14' #8 | 9,525 | 17333211 |
| 615920 | Mar 15, 2006 | Mar 15, 2006 | Pioneer Natural Res. USA, Inc. | Flanagan '14' #7 | 9,500 | 17333210 |
| 615920Amendment | Mar 15, 2006 | Mar 15, 2006 | Pioneer Natural Res. USA, Inc. | Flanagan '14' #7 | 9,500 | 17333210 |
| 615919 | Mar 15, 2006 | Mar 15, 2006 | Pioneer Natural Res. USA, Inc. | Flanagan '14' #6 | 9,500 | 17333209 |
| 615919Amendment | Mar 15, 2006 | Mar 15, 2006 | Pioneer Natural Res. USA, Inc. | Flanagan '14' #6 | 9,500 | 17333209 |
| 615917 | Mar 15, 2006 | Mar 15, 2006 | Pioneer Natural Res. USA, Inc. | Flanagan "14" #5 | 9,500 | 17333208 |
| 615815 | Mar 15, 2006 | Mar 15, 2006 | Mariner Energy, Inc. | Halfmann #2TM | 9,000 | 17333203 |
| 615298 | Mar 6, 2006 | Mar 6, 2006 | Kaiser-Francis Oil Company | Glasscock Unit #3103 | 8,200 | 17333202 |
| 608932 | Feb 24, 2006 | Feb 24, 2006 | BTA Oil Producers | 7904 JV-P Hillger 2A #23D | 7,820 | 17332579 |
| 614771 | Feb 23, 2006 | Feb 23, 2006 | Terrace Petroleum Corporation | Schwartz #1 | 7,800 | 17333201 |
| 613810 | Feb 8, 2006 | Feb 8, 2006 | Range Production Company | Grigsby "10" #3 | 8,500 | 17333195 |
| 613158 | Jan 27, 2006 | Jan 27, 2006 | Range Production Company | Edmondson A #1429A | 9,000 | 17333194 |
| 613097 | Jan 26, 2006 | Jan 26, 2006 | Mariner Energy, Inc. | Matthiesen #4TM | 9,000 | 17333193 |
| 612553 | Jan 23, 2006 | Jan 23, 2006 | Range Production Company | Curry 17 #2 | 9,000 | 17333192 |
| 612405 | Jan 13, 2006 | Jan 13, 2006 | Mariner Energy, Inc. | Niehues "A" #3TM | 9,000 | 17333191 |
| 612099 | Jan 13, 2006 | Jan 13, 2006 | Mariner Energy, Inc. | Strube #3TM | 9,000 | 17333190 |
| 612098 | Jan 13, 2006 | Jan 13, 2006 | Mariner Energy, Inc. | Strube #4TM | 9,000 | 17333189 |
| 611803 | Jan 6, 2006 | Jan 6, 2006 | Pioneer Natural Res. USA, Inc. | Houston, H.A. "A" #6 | 9,600 | 17333188 |
| 611802 | Jan 6, 2006 | Jan 6, 2006 | Pioneer Natural Res. USA, Inc. | Houston, H.A. "A" #5 | 9,600 | 17333187 |
| 611801 | Jan 6, 2006 | Jan 6, 2006 | Pioneer Natural Res. USA, Inc. | Houston, H.A. "A" #4 | 9,600 | 17333186 |
| 611726 | Dec 30, 2005 | Dec 30, 2005 | Mariner Energy, Inc. | Thomason "B" #2TM | 9,000 | 17333185 |
| 611572 | Dec 30, 2005 | Dec 30, 2005 | Range Production Company | Edmondson A #1320 | 9,000 | 17333183 |
| 611731 | Dec 29, 2005 | Dec 29, 2005 | Mariner Energy, Inc. | Thomason "C" #4TM | 9,000 | 17333184 |
| 611089 | Dec 15, 2005 | Dec 15, 2005 | Mariner Energy, Inc. | Matthiesen #3TM | 9,000 | 17333182 |
| 611089Amendment | Dec 15, 2005 | Dec 15, 2005 | Mariner Energy, Inc. | Matthiesen #3TM | 9,000 | 17333182 |
| 611049 | Dec 15, 2005 | Dec 15, 2005 | Griffin Petroleum Company | Sheri #1 | 10,200 | 17333181 |
| 611043 | Dec 15, 2005 | Dec 15, 2005 | Mariner Energy, Inc. | Jimerson #2TM | 9,000 | 17333180 |
| 610919 | Dec 15, 2005 | Dec 15, 2005 | Mariner Energy, Inc. | August #4TM | 9,000 | 17333179 |
| 608083 | Dec 7, 2005 | Dec 7, 2005 | Pioneer Natural Res. USA, Inc. | Botts #2 | 9,500 | 17333170 |
| 609926 | Nov 30, 2005 | Nov 30, 2005 | Range Production Company | Edmondson A #1532 | 9,000 | 17333175 |
| 610076 | Nov 29, 2005 | Nov 29, 2005 | Merit Energy Company | Books, E. C. #3 | 8,424 | 17332190 |
| 610004 | Nov 29, 2005 | Nov 29, 2005 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #924A | 8,215 | 17333177 |
| 609997 | Nov 29, 2005 | Nov 29, 2005 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #913A | 8,255 | 17333362 |
| 609993 | Nov 29, 2005 | Nov 29, 2005 | Pioneer Natural Res. USA, Inc. | Spraberry Driver Unit #933A | 8,220 | 17333364 |
| 609927 | Nov 29, 2005 | Nov 29, 2005 | Range Production Company | Edmondson A #1630 | 9,000 | 17333174 |
| 609859 | Nov 21, 2005 | Nov 21, 2005 | Mariner Energy, Inc. | Glass #6TM | 9,000 | 17333173 |
| 609763 | Nov 18, 2005 | Nov 18, 2005 | Range Production Company | Edmondson A #1429 | 9,000 | 17333172 |
| 609002 | Nov 4, 2005 | Nov 4, 2005 | Mariner Energy, Inc. | Frysak #2TM | 9,000 | 17333357 |
| 606807 | Sep 26, 2005 | Sep 26, 2005 | Range Production Company | Curry 17 #1 | 9,000 | 17333169 |