| 730191 | Dec 21, 2011 | Dec 21, 2011 | XTO Energy Inc. | Federal Delange Gas Unit #1 | 11,950 | 16731392 |
| 730191Amendment | Dec 21, 2011 | Dec 21, 2011 | XTO Energy Inc. | Federal Delange Gas Unit #1 | 11,950 | 16731392 |
| 727695 | Nov 9, 2011 | Nov 9, 2011 | Samson Lone Star, LLC | Bobbie Gas Unit #1 | 16,500 | 16731494 |
| 727695Amendment | Nov 9, 2011 | Nov 9, 2011 | Samson Lone Star, LLC | Bobbie Gas Unit #1 | 16,500 | 16731494 |
| 726612 | Oct 24, 2011 | Oct 24, 2011 | Houston Oil Prod Enterprises,inc | Camp Wallace #2U | 11,970 | 16701984 |
| 717369 | May 30, 2011 | May 30, 2011 | Erg Resources, L.L.C. | Marrs McLean "G" #5 | 5,500 | 16731493 |
| 717368 | May 30, 2011 | May 30, 2011 | Erg Resources, L.L.C. | Smith, George E. -B- R/a -A- #B 58 | 5,000 | 16731492 |
| 715593 | May 11, 2011 | May 11, 2011 | Erg Resources, L.L.C. | Smith, George E. -B- R/a -A- #57 | 5,500 | 16731491 |
| 715591 | May 6, 2011 | May 6, 2011 | Erg Resources, L.L.C. | Loustalot #A 8 | 5,000 | 16731490 |
| 715470 | May 5, 2011 | May 5, 2011 | Reef Exploration, L.P. | Halls Bayou Ranch #9 | 12,700 | 16731489 |
| 714695 | Apr 29, 2011 | Apr 29, 2011 | Forza Operating, LLC | Langley Unit #1 | 11,200 | 16731488 |
| 714695Amendment | Apr 29, 2011 | Apr 29, 2011 | Interstate Explorations LLC | Langley Unit #1 | 11,200 | 16731488 |
| 712171 | Mar 18, 2011 | Mar 18, 2011 | Davis Petroleum Corp. | Wooten Horse #1 | 6,700 | 16731487 |
| 712171Amendment | Mar 18, 2011 | Mar 18, 2011 | Davis Petroleum Corp. | Wooten Horse #1ST | 6,700 | 16731487 |
| 711159 | Mar 8, 2011 | Mar 8, 2011 | El Paso E & P Company, L. P. | Sunny Ernst G.U. 1 #2 | 15,575 | 16731468 |
| 711390 | Mar 7, 2011 | Mar 7, 2011 | XTO Energy Inc. | Federal Delange Gas Unit #1 | 11,950 | 16731392 |
| 710801 | Feb 28, 2011 | Feb 28, 2011 | Marlin Energy Southwest GP, LLC | Galveston Bay Tract 282 #1 | 15,100 | 16731486 |
| 709822 | Feb 9, 2011 | Feb 9, 2011 | Denbury Onshore, LLC | South Gillock #23 | 8,975 | 16701203 |
| 708754 | Jan 21, 2011 | Jan 21, 2011 | Denbury Onshore, LLC | South Gillock Unit #36 | 9,026 | 16701221 |
| 706691 | Jan 10, 2011 | Jan 10, 2011 | Hitchcock SWD Corporation | Wade #2 | 4,500 | 16731485 |
| 705441 | Nov 19, 2010 | Nov 19, 2010 | Houston Oil Prod Enterprises,inc | Cade, E.K. #150 | 7,960 | 16731484 |
| 705430 | Nov 19, 2010 | Nov 19, 2010 | Houston Oil Prod Enterprises,inc | Cade, E.K. #151 | 8,040 | 16731483 |
| 703840 | Nov 2, 2010 | Nov 2, 2010 | Houston Oil Prod Enterprises,inc | Cade, E.K. #152 | 8,350 | 16731482 |
| 703986 | Oct 22, 2010 | Oct 22, 2010 | XTO Energy Inc. | Aronsfeld Oil Unit #1 | 11,700 | 16731212 |
| 701472 | Sep 1, 2010 | Sep 1, 2010 | Sandalwood Exploration, L.P. | Creston King, et Al #2 | 4,300 | 16731481 |
| 697779 | Jun 18, 2010 | Jun 18, 2010 | Ricochet Energy, Inc. | Halls Bayou Ranch #1 | 7,000 | 16731480 |
| 697508 | Jun 11, 2010 | Jun 11, 2010 | Sandalwood Exploration, L.P. | Creston King, et Al #1 | 4,300 | 16731479 |
| 693705 | Apr 2, 2010 | Apr 2, 2010 | Rutherford Oil Corporation | East Bay Tract 180 A #2 | 8,832 | 16731375 |
| 687054 | Nov 12, 2009 | Nov 12, 2009 | Sandalwood Exploration, L.P. | HBR Unit No. 1 #1 | 5,700 | 16731478 |
| 687054Amendment | Nov 12, 2009 | Nov 12, 2009 | Sandalwood Exploration, L.P. | HBR Unit No. 1 #1 | 5,700 | 16731478 |
| 686544 | Oct 27, 2009 | Oct 27, 2009 | Houston Oil Prod Enterprises,inc | Cade, E. K. #148 | 8,900 | 16731477 |
| 686544Amendment | Oct 27, 2009 | Oct 27, 2009 | Houston Oil Prod Enterprises,inc | Cade, E. K. #148 | 7,632 | 16731477 |
| 685992 | Oct 9, 2009 | Oct 9, 2009 | XTO Energy Inc. | Federal Delange Gas Unit #1 | 11,950 | 16731392 |
| 685733 | Oct 2, 2009 | Oct 2, 2009 | Davis Southern Operating Co LLC | Sharp #1 | 11,500 | 16731476 |
| 685733Amendment | Oct 2, 2009 | Oct 2, 2009 | Square Mile Energy, L.L.C. | Sharp #1 | 11,500 | 16731476 |
| 685341 | Sep 22, 2009 | Sep 22, 2009 | New Century Exploration, Inc. | Bofysil #1 | 12,700 | 16731360 |
| 683657 | Aug 4, 2009 | Aug 4, 2009 | Wwxploration, LLC | Cooper #B 2 | 20,000 | 16731475 |
| 683185 | Jul 21, 2009 | Jul 21, 2009 | Coronado Energy E&P Company, LLC | Sunny Ernst GU 1 #1 | 15,300 | 16731352 |
| 678084Amendment | May 28, 2009 | May 28, 2009 | Suemaur Expl. & Prod., LLC | Craighead et Al #1 | 15,000 | 16731472 |
| 681201 | May 14, 2009 | May 14, 2009 | Ventum Oil and Gas, LP | Ortego #2 | 15,000 | 16731474 |
| 678528 | Feb 13, 2009 | Feb 13, 2009 | Howard Exploration, Inc. | Halls Bayou Ranch #1 | 4,000 | 16731473 |
| 678084 | Feb 10, 2009 | Feb 10, 2009 | Suemaur Expl. & Prod., LLC | Craighead et Al #1 | 15,000 | 16731472 |
| 678084Amendment | Feb 10, 2009 | Feb 10, 2009 | Suemaur Expl. & Prod., LLC | Craighead et Al #1 | 8,000 | 16731472 |
| 672874 | Oct 16, 2008 | Oct 16, 2008 | Sandridge Onshore, LLC | State Tract 330 #2R | 20,000 | 16731324 |
| 671017 | Sep 29, 2008 | Sep 29, 2008 | Ventum Oil and Gas, LP | Ortego #1 | 15,500 | 16731470 |
| 671017Amendment | Sep 29, 2008 | Sep 29, 2008 | Ventum Oil and Gas, LP | Ortego #1 | 15,500 | 16731470 |
| 669730 | Sep 12, 2008 | Sep 12, 2008 | Hunt, Hassie Exploration Company | Federal Brooks Gas Unit #2 | 11,796 | 16731401 |
| 667679 | Aug 13, 2008 | Aug 13, 2008 | Houston Oil Prod Enterprises,inc | Cade, E. K. #114 | 8,200 | 16702045 |
| 665112 | Aug 5, 2008 | Aug 5, 2008 | Hunt, Hassie Exploration Company | C E Franks Gas Unit #1 #2 | 11,650 | 16701951 |
| 666147 | Jul 25, 2008 | Jul 25, 2008 | BP Pipelines (North America),inc | BP CP Anode #1 | 170 | 16731469 |
| 662896 | Jun 16, 2008 | Jun 16, 2008 | Coronado Energy E&P Company, LLC | Sunny Ernst GU 1 #2 | 16,700 | 16731468 |
| 657822 | Apr 2, 2008 | Apr 2, 2008 | Milagro Exploration, LLC | Stewart, Maco "A" #46 | 14,000 | 16731467 |
| 657632 | Mar 28, 2008 | Mar 28, 2008 | Milagro Exploration, LLC | Stewart, Maco "A" #47 | 14,000 | 16731466 |
| 657605 | Mar 28, 2008 | Mar 28, 2008 | Suemaur Expl. & Prod., LLC | Long Island #1 | 9,300 | 16731465 |
| 654446 | Feb 22, 2008 | Feb 22, 2008 | Cimarex Energy Co. of Colorado | Bruce Gas Unit #1 | 12,580 | 16731006 |
| 655134 | Feb 19, 2008 | Feb 19, 2008 | New Century Exploration, Inc. | Gilbert #1 | 9,700 | 16731464 |
| 653314 | Feb 4, 2008 | Feb 4, 2008 | Hunt, Hassie Exploration Company | Aronsfeld Gas Unit #3 | 12,134 | 16731384 |
| 651914 | Jan 24, 2008 | Jan 24, 2008 | Houston Oil Prod Enterprises,inc | Cade, E. K. #147 | 8,900 | 16731463 |
| 651914Amendment | Jan 24, 2008 | Jan 24, 2008 | Houston Oil Prod Enterprises,inc | Cade, E. K. #147 | 8,005 | 16731463 |
| 651914Amendment | Jan 24, 2008 | Jan 24, 2008 | Houston Oil Prod Enterprises,inc | Cade, E. K. #147 | 9,765 | 16731463 |
| 652212 | Jan 8, 2008 | Jan 8, 2008 | Erg Resources, L.L.C. | G.E. Smith "B" R/a "A" #B 57 | 5,500 | 16731462 |
| 651665 | Dec 21, 2007 | Dec 21, 2007 | Hunt, Hassie Exploration Company | Camp Wallace D #1A | 11,400 | 16731179 |
| 651275 | Dec 18, 2007 | Dec 18, 2007 | X Company Oil, LLC | Marrs McLean #1 | 4,400 | 16731459 |
| 650355 | Dec 10, 2007 | Dec 10, 2007 | Houston Oil Prod Enterprises,inc | Cade, E. K. #146 | 8,900 | 16731458 |
| 650355Amendment | Dec 10, 2007 | Dec 10, 2007 | Houston Oil Prod Enterprises,inc | Cade, E. K. #146 | 8,195 | 16731458 |
| 650542 | Dec 8, 2007 | Dec 8, 2007 | Erg Resources, L.L.C. | Loustalot #A 7 | 5,500 | 16731457 |
| 649292 | Nov 15, 2007 | Nov 15, 2007 | Sandalwood Exploration, L.P. | Halls Bayou Ranch, et Al #1 | 7,400 | 16731455 |
| 648813 | Nov 7, 2007 | Nov 7, 2007 | National Onshore LP | San Leon Gas Unit B #1 | 18,000 | 16731454 |
| 648813Amendment | Nov 7, 2007 | Nov 7, 2007 | Sandridge Onshore, LLC | San Leon Gas Unit B #1 | 18,000 | 16731454 |
| 648035 | Oct 25, 2007 | Oct 25, 2007 | Suemaur Expl. & Prod., LLC | Plite, et Al #1 | 11,000 | 16731453 |
| 646562 | Sep 27, 2007 | Sep 27, 2007 | Erg Resources, L.L.C. | Smith, George E. -a- R/a -A- #40 | 5,900 | 16731452 |
| 646560 | Sep 27, 2007 | Sep 27, 2007 | Erg Resources, L.L.C. | Smith, George E. -a- R/a -A- #39 | 5,900 | 16731451 |
| 645923 | Sep 14, 2007 | Sep 14, 2007 | Reef Exploration, L.P. | Halls Bayou Ranch "A" #1 | 14,292 | 16731429 |
| 643777 | Sep 10, 2007 | Sep 10, 2007 | Capco Offshore of Texas, Inc. | Zinn and Forman #23 | 7,850 | 16731450 |
| 644232 | Aug 14, 2007 | Aug 14, 2007 | Alta Mesa Services, LP | Tnct #1R | 9,100 | 16731449 |
| 642728 | Jul 30, 2007 | Jul 30, 2007 | Hunt, Hassie Exploration Company | Franks/8900 Sand/Unit #2603 | 9,070 | 16701428 |
| 636451 | Jul 3, 2007 | Jul 3, 2007 | Capco Offshore of Texas, Inc. | Zinn and Forman #10 | 7,851 | 16700921 |
| 639490 | May 29, 2007 | May 29, 2007 | Erg Resources, L.L.C. | Marrs McLean "G" #4 | 5,900 | 16731447 |
| 639491 | May 25, 2007 | May 25, 2007 | Erg Resources, L.L.C. | Marrs McLean "H" #6 | 5,900 | 16731448 |
| 636578 | Apr 18, 2007 | Apr 18, 2007 | Sue-Ann Operating, L.C. | Kelley Resources Ltd Unit #2 | 9,511 | 16701390 |
| 628936 | Jan 10, 2007 | Jan 10, 2007 | Houston Oil Prod Enterprises,inc | O'Brien, Erin E. Unit 1 (06121) #3 | 8,900 | 16731444 |
| 630101 | Jan 5, 2007 | Jan 5, 2007 | Stroud Production LLC | McLean, Marrs D #7 | 4,800 | 16731446 |
| 629701 | Nov 30, 2006 | Nov 30, 2006 | Stroud Production LLC | McNeill "B" #9 | 5,255 | 16731445 |
| 625545 | Nov 17, 2006 | Nov 17, 2006 | National Onshore LP | State Tract 330 Gas Unit #2 | 18,000 | 16731324 |
| 628628 | Nov 7, 2006 | Nov 7, 2006 | Houston Oil Prod Enterprises,inc | O'Brien, E. Unit 6 #3 | 8,800 | 16731442 |
| 626133 | Oct 20, 2006 | Oct 20, 2006 | St. Mary Land & Exploration Co. | St 236/237 Unit #1 | 11,200 | 16731441 |
| 626133Amendment | Oct 20, 2006 | Oct 20, 2006 | St. Mary Land & Exploration Co. | St 236/237 Unit #1 | 11,200 | 16731441 |
| 627171 | Oct 9, 2006 | Oct 9, 2006 | Stroud Production LLC | Taylor-Cade #2 | 5,100 | 16731440 |
| 625647 | Sep 8, 2006 | Sep 8, 2006 | Sue-Ann Operating, L.C. | Tacquard, George et Al #1 | 9,750 | 16731438 |
| 624818 | Aug 23, 2006 | Aug 23, 2006 | Stroud Production LLC | Smith, G. E. -a- R/a -A- #38 | 5,220 | 16731437 |
| 624100 | Aug 9, 2006 | Aug 9, 2006 | Hunt, Hassie Exploration Company | Gordon #1 | 12,030 | 16731363 |
| 623046 | Jul 31, 2006 | Jul 31, 2006 | Continental Operating Co. | Smith, Charlotte E. R/a -A- #46 | 5,200 | 16731436 |
| 623046Amendment | Jul 31, 2006 | Jul 31, 2006 | Continental Operating Co. | Smith, Charlotte E. R/a -A- #46 | 4,600 | 16731436 |
| 623046Amendment | Jul 31, 2006 | Jul 31, 2006 | Continental Operating Co. | Smith, Charlotte E. R/a -A- #46 | 4,600 | 16731436 |
| 623043 | Jul 31, 2006 | Jul 31, 2006 | Continental Operating Co. | Cade, E. Ker -a- R/a -A- #312 | 5,500 | 16731435 |
| 623035 | Jul 31, 2006 | Jul 31, 2006 | Continental Operating Co. | Cade, E. -a- R/a -A- #313 | 6,200 | 16731434 |
| 619844 | Jul 12, 2006 | Jul 12, 2006 | Tema Oil and Gas Company | Van Der Vaart #1 | 10,000 | 16730132 |
| 621647 | Jun 27, 2006 | Jun 27, 2006 | KCS Resources, Inc. | Bayou Development B #B 22 | 9,700 | 16731433 |
| 621647Amendment | Jun 27, 2006 | Jun 27, 2006 | Milagro Exploration, LLC | Bayou Development B #B 22 | 9,700 | 16731433 |
| 621467 | Jun 27, 2006 | Jun 27, 2006 | Transatlantic Petr (USA) Corp. | South Gillock Unit #96 | 10,500 | 16731432 |