| 606309 | Sep 14, 2005 | Sep 14, 2005 | Peak Energy Operating #2, LLC | Dorsey #1HH | 5,675 | 22131043 |
| 606309Amendment | Sep 14, 2005 | Sep 14, 2005 | Peak Energy Operating #2, LLC | Dorsey #1HH | 5,675 | 22131043 |
| 606100 | Sep 12, 2005 | Sep 12, 2005 | Quicksilver Resources Inc. | Langdon Unit "B" #1HH | 6,400 | 22131042 |
| 606074 | Sep 9, 2005 | Sep 9, 2005 | Peak Energy Operating #2, LLC | Cate #2HH | 5,660 | 22131041 |
| 606053 | Sep 8, 2005 | Sep 8, 2005 | Young, Marshall R., Oil Co. | Helton #1HH | 10,350 | 22131040 |
| 605921 | Sep 7, 2005 | Sep 7, 2005 | Quicksilver Resources Inc. | Stewart Unit #1HH | 6,400 | 22131039 |
| 605427 | Aug 25, 2005 | Aug 25, 2005 | Quicksilver Resources Inc. | Parker Unit #2HH | 6,400 | 22131038 |
| 605427Amendment | Aug 25, 2005 | Aug 25, 2005 | Quicksilver Resources Inc. | Parker Unit #2HH | 6,400 | 22131038 |
| 605426 | Aug 25, 2005 | Aug 25, 2005 | Quicksilver Resources Inc. | Parker Unit #1HH | 6,400 | 22131037 |
| 605426Amendment | Aug 25, 2005 | Aug 25, 2005 | Quicksilver Resources Inc. | Parker Unit #1HH | 6,400 | 22131037 |
| 605164 | Aug 19, 2005 | Aug 19, 2005 | Quicksilver Resources Inc. | Pallmeyer Unit "A" #1HH | 6,400 | 22131036 |
| 605163 | Aug 19, 2005 | Aug 19, 2005 | Quicksilver Resources Inc. | Mooney Unit "B" #1HH | 6,400 | 22131035 |
| 605162 | Aug 19, 2005 | Aug 19, 2005 | Quicksilver Resources Inc. | Mooney Unit "A" #1HH | 6,400 | 22131034 |
| 604864 | Aug 12, 2005 | Aug 12, 2005 | Burlington Resources O & G Co LP | Bowser Ranch #1HH | 9,000 | 22131033 |
| 604125 | Jul 29, 2005 | Jul 29, 2005 | Republic Energy Inc. | Titus #1HH | 8,000 | 22131032 |
| 603973 | Jul 27, 2005 | Jul 27, 2005 | Peak Energy Operating #2, LLC | Bratten Ranch #11H | 5,200 | 22131031 |
| 603950 | Jul 27, 2005 | Jul 27, 2005 | Quicksilver Resources Inc. | Gilligan Unit #1HH | 6,400 | 22131030 |
| 603935 | Jul 26, 2005 | Jul 26, 2005 | Shale Tank Truck LP | Partusch #2WD | 6,500 | 22131029 |
| 603276 | Jul 12, 2005 | Jul 12, 2005 | Republic Energy Inc. | Comanche Peak #3HH | 7,500 | 22131028 |
| 603205 | Jul 11, 2005 | Jul 11, 2005 | EOG Resources, Inc. | Black Ranch #5HH | 5,700 | 22131027 |
| 603122 | Jul 7, 2005 | Jul 7, 2005 | EOG Resources, Inc. | Black Ranch #4HH | 5,700 | 22131026 |
| 602663 | Jun 30, 2005 | Jun 30, 2005 | Quicksilver Resources Inc. | Vette #1HH | 6,400 | 22131025 |
| 602661 | Jun 29, 2005 | Jun 29, 2005 | Quicksilver Resources Inc. | Vette #2HH | 6,400 | 22131024 |
| 602536 | Jun 24, 2005 | Jun 24, 2005 | Carrizo Oil & Gas, Inc. | Buzzard Hollow Ranch #1HH | 7,500 | 22131023 |
| 601705 | Jun 7, 2005 | Jun 7, 2005 | Quicksilver Resources Inc. | Marshall, Sam #1HH | 6,400 | 22131022 |
| 601469 | Jun 6, 2005 | Jun 6, 2005 | Quicksilver Resources Inc. | Colonel Flagg Unit #1HH | 6,400 | 22131020 |
| 601514 | Jun 2, 2005 | Jun 2, 2005 | EOG Resources, Inc. | Black Ranch #3HH | 5,700 | 22131021 |
| 601181 | May 25, 2005 | May 25, 2005 | Quicksilver Resources Inc. | Colonel Flagg Unit #2HH | 6,400 | 22131019 |
| 601175 | May 25, 2005 | May 25, 2005 | Quicksilver Resources Inc. | Lucy Unit #1HH | 6,400 | 22131018 |
| 601150 | May 24, 2005 | May 24, 2005 | Reichmann Petroleum Corp. | Caraway "B" Unit #3HH | 8,000 | 22131017 |
| 601049 | May 24, 2005 | May 24, 2005 | Encana Oil & Gas(usa) Inc. | Mills #2HH | 9,000 | 22131016 |
| 600989 | May 20, 2005 | May 20, 2005 | Sauder Management Company | Odom (Slocum) Ranch #1HH | 6,500 | 22131015 |
| 600989Amendment | May 20, 2005 | May 20, 2005 | Sauder Management Company | Odom (Slocum) Ranch #1HH | 7,500 | 22131015 |
| 600954 | May 20, 2005 | May 20, 2005 | XTO Energy Inc. | Wilhoit #3HH | 10,000 | 22131014 |
| 600579 | May 12, 2005 | May 12, 2005 | Republic Energy Inc. | Behrens #1HH | 8,000 | 22131013 |
| 600523 | May 11, 2005 | May 11, 2005 | Republic Energy Inc. | Georges Creek Ranch #5HH | 8,000 | 22131012 |
| 561130 | Apr 27, 2005 | Apr 27, 2005 | Reichmann Petroleum Corp. | Caraway Unit #2H | 8,000 | 22131011 |
| 560662 | Apr 18, 2005 | Apr 18, 2005 | Quicksilver Resources Inc. | Gibbs Unit #1H | 6,400 | 22131010 |
| 560074 | Apr 7, 2005 | Apr 7, 2005 | Shale Tank Truck LP | Partusch #1WD | 6,500 | 22100019 |
| 559860 | Apr 1, 2005 | Apr 1, 2005 | Quicksilver Resources Inc. | Gibbs Unit #2H | 6,400 | 22131009 |
| 559099 | Mar 16, 2005 | Mar 16, 2005 | Quicksilver Resources Inc. | Major Burns Unit #1 HH | 6,400 | 22131007 |
| 559075 | Mar 16, 2005 | Mar 16, 2005 | Arrington,david H. Oil & Gas,inc | Vermont Hares Ear "A" #2 HH | 7,000 | 22131006 |
| 558877 | Mar 11, 2005 | Mar 11, 2005 | Encana Oil & Gas(usa) Inc. | Ward #1 HH | 7,000 | 22131005 |
| 558847 | Mar 10, 2005 | Mar 10, 2005 | Quicksilver Resources Inc. | Speed Racer #1 HH | 6,400 | 22131004 |
| 558846 | Mar 10, 2005 | Mar 10, 2005 | Quicksilver Resources Inc. | Smelley #1H | 6,400 | 22131003 |
| 558786 | Mar 9, 2005 | Mar 9, 2005 | Sullivan, Hollis R. Inc. | Slocum #1 HH | 8,500 | 22131002 |
| 558754 | Mar 9, 2005 | Mar 9, 2005 | EOG Resources, Inc. | Black Ranch #2 | 6,000 | 22131001 |
| 558752 | Mar 9, 2005 | Mar 9, 2005 | EOG Resources, Inc. | Black Ranch #1H | 5,200 | 22131000 |
| 558438 | Mar 2, 2005 | Mar 2, 2005 | Quicksilver Resources Inc. | Mary Ann Unit #1 HH | 6,400 | 22130999 |
| 558381 | Mar 1, 2005 | Mar 1, 2005 | Quicksilver Resources Inc. | Langdon #2 | 6,200 | 22130998 |
| 558090 | Feb 23, 2005 | Feb 23, 2005 | Republic Energy Inc. | Comanche Peak #2 HH | 7,500 | 22130997 |
| 557566 | Feb 11, 2005 | Feb 11, 2005 | Arrington,david H. Oil & Gas,inc | Vermont Hares Ear #1 HH | 7,000 | 22130996 |
| 557332 | Feb 7, 2005 | Feb 7, 2005 | Quicksilver Resources Inc. | Professor Unit #1HH | 6,400 | 22130995 |
| 557332Amendment | Feb 7, 2005 | Feb 7, 2005 | Quicksilver Resources Inc. | Professor Unit #1HH | 6,400 | 22130995 |
| 556878 | Jan 27, 2005 | Jan 27, 2005 | Quicksilver Resources Inc. | Langdon #1 HH | 6,400 | 22130994 |
| 556229 | Jan 14, 2005 | Jan 14, 2005 | Quicksilver Resources Inc. | Hawkeye Unit #1HH | 6,400 | 22130993 |
| 556229Amendment | Jan 14, 2005 | Jan 14, 2005 | Quicksilver Resources Inc. | Hawkeye Unit #1 HH | 5,637 | 22130993 |
| 556229Amendment | Jan 14, 2005 | Jan 14, 2005 | Quicksilver Resources Inc. | Hawkeye Unit #1HH | 5,637 | 22130993 |
| 555937 | Jan 10, 2005 | Jan 10, 2005 | Quicksilver Resources Inc. | Zbar Land & Cattle Co. #1 HH | 6,400 | 22130992 |
| 555660 | Jan 7, 2005 | Jan 7, 2005 | Peak Operating of Texas, LLC | Bratten Ranch #10 | 5,300 | 22130991 |
| 555660Amendment | Jan 7, 2005 | Jan 7, 2005 | Peak Operating of Texas, LLC | Bratten Ranch #10H | 5,300 | 22130991 |
| 555660Amendment | Jan 7, 2005 | Jan 7, 2005 | Peak Energy Operating #2, LLC | Bratten Ranch #10H | 5,300 | 22130991 |
| 555660Amendment | Jan 7, 2005 | Jan 7, 2005 | Peak Energy Operating #2, LLC | Bratten Ranch #10H | 5,300 | 22130991 |
| 555660Amendment | Jan 7, 2005 | Jan 7, 2005 | Peak Energy Operating #2, LLC | Bratten Ranch #10H | 5,300 | 22130991 |
| 553968 | Nov 22, 2004 | Nov 22, 2004 | Republic Energy Inc. | Comanche Peak #1HH | 7,500 | 22130990 |
| 553886 | Nov 19, 2004 | Nov 19, 2004 | Winchester Production Company | Mills #1H | 7,000 | 22130989 |
| 553698 | Nov 18, 2004 | Nov 18, 2004 | Quicksilver Resources Inc. | Trapper John #2 HH | 6,400 | 22130987 |
| 553759 | Nov 17, 2004 | Nov 17, 2004 | Quicksilver Resources Inc. | Hot Lips Unit #1HH | 6,400 | 22130988 |
| 553759Amendment | Nov 17, 2004 | Nov 17, 2004 | Quicksilver Resources Inc. | Hot Lips Unit #1HH | 9,061 | 22130988 |
| 553483 | Nov 10, 2004 | Nov 10, 2004 | Quicksilver Resources Inc. | Trapper John #1 HH | 6,400 | 22130986 |
| 550179 | Aug 27, 2004 | Aug 27, 2004 | Quicksilver Resources Inc. | Mary Ann #2HH | 5,800 | 22130985 |
| 550179Amendment | Aug 27, 2004 | Aug 27, 2004 | Quicksilver Resources Inc. | Mary Ann #2HH | 6,500 | 22130985 |
| 550179Amendment | Aug 27, 2004 | Aug 27, 2004 | Quicksilver Resources Inc. | Mary Ann #2HH | 5,717 | 22130985 |
| 550056 | Aug 24, 2004 | Aug 24, 2004 | Quicksilver Resources Inc. | Professor #2 HH | 5,800 | 22130984 |
| 550056Amendment | Aug 24, 2004 | Aug 24, 2004 | Quicksilver Resources Inc. | Professor Unit #2HH | 5,652 | 22130984 |
| 549711 | Aug 19, 2004 | Aug 19, 2004 | Quicksilver Resources Inc. | Cannibal #1 | 8,000 | 22130983 |
| 549711Amendment | Aug 19, 2004 | Aug 19, 2004 | Quicksilver Resources Inc. | Cannibal #1D | 8,000 | 22130983 |
| 549711Amendment | Aug 19, 2004 | Aug 19, 2004 | Quicksilver Resources Inc. | Cannibal #1D | 10,500 | 22130983 |
| 549052 | Aug 9, 2004 | Aug 9, 2004 | G & F Oil, Inc. | Tanton #1 | 5,650 | 22130576 |
| 548466 | Jul 20, 2004 | Jul 20, 2004 | Republic Energy Inc. | Courts Cleveland #1HH | 7,500 | 22130982 |
| 539169 | Dec 2, 2003 | Dec 2, 2003 | AC Exploration, LLC | Overton, J.D. Heirs #1 | 7,200 | 22130978 |
| 517266 | Feb 1, 2002 | Feb 1, 2002 | Richman Petroleum Corp. | Morrison #1 | 5,400 | 22130981 |
| 517008 | Jan 22, 2002 | Jan 22, 2002 | Richman Petroleum Corp. | Caraway #1 | 5,400 | 22130980 |
| 516562 | Jan 2, 2002 | Jan 2, 2002 | Richman Petroleum Corp. | Dove, Wallace #2 | 5,500 | 22130979 |
| 515954 | Dec 10, 2001 | Dec 10, 2001 | Richman Petroleum Corp. | Dove, Wallace #1 | 5,200 | 22130977 |
| 515793 | Dec 3, 2001 | Dec 3, 2001 | Precision Operating Inc. | Partusch #1 | 6,000 | 22100019 |
| 514790 | Nov 1, 2001 | Nov 1, 2001 | Precision Operating Inc. | Goodlett #4A | 6,000 | 22130967 |
| 514866 | Oct 30, 2001 | Oct 30, 2001 | Richman Petroleum Corp. | Coleman, James #1 | 6,000 | 22130976 |
| 513838 | Sep 24, 2001 | Sep 24, 2001 | Richman Petroleum Corp. | Randall, Tanya #1 | 5,800 | 22130975 |
| 512413 | Aug 9, 2001 | Aug 9, 2001 | Meeker, Dan Management, Inc. | Mesa Wood -B- #4 | 5,300 | 22130973 |
| 512412 | Aug 9, 2001 | Aug 9, 2001 | Meeker, Dan Management, Inc. | Mesa Wood A-3 #3 | 5,300 | 22130974 |
| 504415 | Jan 22, 2001 | Jan 22, 2001 | Meeker, Dan Management, Inc. | Wood #3 | 6,000 | 22130972 |
| 504415Amendment | Jan 22, 2001 | Jan 22, 2001 | Meeker, Dan Management, Inc. | Mesa Wood -A- #2 | 6,000 | 22130972 |
| 503513 | Dec 28, 2000 | Dec 28, 2000 | Meeker, Dan Management, Inc. | Wood Reef #2 | 6,000 | 22130971 |
| 503513Amendment | Dec 28, 2000 | Dec 28, 2000 | Meeker, Dan Management, Inc. | Mesa Wood #1 | 6,000 | 22130971 |
| 498239 | Aug 8, 2000 | Aug 8, 2000 | Rodessa Operating Company | Wood #1 | 7,200 | 22130970 |
| 498239Amendment | Aug 8, 2000 | Aug 8, 2000 | Meeker, Dan Management, Inc. | Wood #1 | 7,200 | 22130970 |
| 486968 | Aug 26, 1999 | Aug 26, 1999 | Basal Corporation | Swearingen Gas Unit #1 | 6,000 | 22130969 |
| 477754 | Jul 13, 1998 | Jul 13, 1998 | Basal Corporation | Milburn #2 | 6,001 | 22130712 |
| 477749 | Jul 9, 1998 | Jul 9, 1998 | Basal Corporation | Hooks, Everett #1 | 5,606 | 22130695 |