| 692320 | Mar 11, 2010 | Mar 11, 2010 | Mestena Operating, L.L.C. | Tres Puertas #4 | 3,600 | 04732079 |
| 692314 | Mar 11, 2010 | Mar 11, 2010 | Mestena Operating, L.L.C. | Mil Pesos #3 | 5,370 | 04732064 |
| 692384 | Mar 9, 2010 | Mar 9, 2010 | EOG Resources, Inc. | La Gloria Gas Unit #115 | 9,800 | 04732418 |
| 692384Amendment | Mar 9, 2010 | Mar 9, 2010 | EOG Resources, Inc. | La Gloria Gas Unit #115 | 9,800 | 04732418 |
| 691480 | Feb 19, 2010 | Feb 19, 2010 | Exxon Mobil Corporation | Kelsey Unit #M570BD | 8,700 | 04732167 |
| 690719 | Feb 19, 2010 | Feb 19, 2010 | Crimson Exploration Oper., Inc. | Garcia Gas Unit 2 #2 | 11,300 | 04732083 |
| 690719Amendment | Feb 19, 2010 | Feb 19, 2010 | Crimson Exploration Oper., Inc. | Garcia Gas Unit 2 #2 | 11,300 | 04732083 |
| 691396 | Feb 18, 2010 | Feb 18, 2010 | Brigham Oil & Gas, L.P. | D.J. Sullivan State #16 | 14,000 | 04732417 |
| 690347 | Jan 28, 2010 | Jan 28, 2010 | Denali Oil & Gas Management, LLC | Cage Ranch 603 #1 | 10,000 | 04732416 |
| 690024 | Jan 25, 2010 | Jan 25, 2010 | Newfield Exploration Company | La Rucia Ranch #31 | 13,000 | 04732415 |
| 689377 | Jan 6, 2010 | Jan 6, 2010 | EOG Resources, Inc. | La Gloria Gas Unit #114 | 9,500 | 04732413 |
| 689146 | Jan 4, 2010 | Jan 4, 2010 | Denali Oil & Gas Management, LLC | Cage Ranch 656 #1 | 10,000 | 04732412 |
| 689146Amendment | Jan 4, 2010 | Jan 4, 2010 | Denali Oil & Gas Management, LLC | Cage Ranch 656 #1 | 10,000 | 04732412 |
| 689146Amendment | Jan 4, 2010 | Jan 4, 2010 | Denali Oil & Gas Management, LLC | Cage Ranch 656 #1 | 10,000 | 04732412 |
| 689146Amendment | Jan 4, 2010 | Jan 4, 2010 | Denali Oil & Gas Management, LLC | Cage Ranch 656 #1 | 10,000 | 04732412 |
| 689146Amendment | Jan 4, 2010 | Jan 4, 2010 | Denali Oil & Gas Management, LLC | Cage Ranch 656 #1 | 10,000 | 04732412 |
| 688757 | Dec 17, 2009 | Dec 17, 2009 | Pogo Producing Company LLC | Lopez, H. #6 | 12,100 | 04732411 |
| 684305 | Oct 7, 2009 | Oct 7, 2009 | Exxon Mobil Corporation | Kelsey Unit #S 55M | 7,374 | 04732150 |
| 685123 | Sep 15, 2009 | Sep 15, 2009 | Pogo Producing Company LLC | Lopez, H. #5 | 12,000 | 04732410 |
| 683985 | Aug 19, 2009 | Aug 19, 2009 | Magnum Producing, LP | Martinez Gas Unit #1 | 10,000 | 04732169 |
| 683985Amendment | Aug 19, 2009 | Aug 19, 2009 | Magnum Producing, LP | Martinez #1 | 10,000 | 04732169 |
| 683885 | Aug 19, 2009 | Aug 19, 2009 | Crimson Exploration Oper., Inc. | Cage Ranch #291 | 10,400 | 04732375 |
| 683550 | Aug 17, 2009 | Aug 17, 2009 | Paladin Petroleum III, L.L.C. | Scott & Hopper 382 #1 | 11,500 | 04732371 |
| 682272 | Jun 23, 2009 | Jun 23, 2009 | Newfield Exploration Company | Santa FE Ranch #208 | 9,000 | 04732409 |
| 677749Amendment | Jun 3, 2009 | Jun 3, 2009 | Pogo Producing Company LLC | Lopez, H. #4 | 12,200 | 04732407 |
| 681335 | Jun 2, 2009 | Jun 2, 2009 | Crimson Exploration Oper., Inc. | Cage Ranch #31 | 9,200 | 04732383 |
| 681483 | May 22, 2009 | May 22, 2009 | Coronado Energy E&P Company, LLC | McGill Bros. #636 | 13,000 | 04732408 |
| 679216 | Mar 6, 2009 | Mar 6, 2009 | Mestena Operating, Ltd. | Garcia 1 #31 | 10,000 | 04731609 |
| 678530 | Feb 13, 2009 | Feb 13, 2009 | Goldston Oil Corporation | Myrick #1 | 8,547 | 04732256 |
| 678233Amendment | Feb 6, 2009 | Feb 6, 2009 | Coronado Energy E&P Company, LLC | McGill Bros. #634 | 13,000 | 04732414 |
| 678141 | Feb 5, 2009 | Feb 5, 2009 | Exxon Mobil Corporation | Viboras Field Gas Unit No. 1 #11ZS | 11,500 | 04730967 |
| 677749 | Feb 4, 2009 | Feb 4, 2009 | Pogo Producing Company LLC | Lopez, H. #4 | 12,200 | 04732407 |
| 675677 | Dec 30, 2008 | Dec 30, 2008 | Brigham Oil & Gas, L.P. | Sullivan, D.J. C #41 | 13,000 | 04732401 |
| 676029 | Dec 22, 2008 | Dec 22, 2008 | Brigham Oil & Gas, L.P. | Palmer 347 #13 | 13,000 | 04732405 |
| 676283 | Dec 18, 2008 | Dec 18, 2008 | Erskine Energy, LLC | Sullivan #H 3 | 12,500 | 04732332 |
| 675722 | Dec 16, 2008 | Dec 16, 2008 | Brigham Oil & Gas, L.P. | Sullivan, D.J. C #40 | 13,000 | 04732404 |
| 675763 | Dec 4, 2008 | Dec 4, 2008 | Newfield Exploration Company | Santa FE Ranch "B" #301 | 16,000 | 04732403 |
| 675672 | Dec 3, 2008 | Dec 3, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #632 | 13,000 | 04732402 |
| 675672Amendment | Dec 3, 2008 | Dec 3, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #632 | 13,600 | 04732402 |
| 675499 | Nov 26, 2008 | Nov 26, 2008 | Newfield Exploration Company | Santa FE Ranch "B" #300 | 16,000 | 04732400 |
| 675364 | Nov 24, 2008 | Nov 24, 2008 | Mestena Operating, Ltd. | Perdito #1 | 10,000 | 04731513 |
| 675319 | Nov 22, 2008 | Nov 22, 2008 | Bopco, L.P. | El Coyote Ranch #6 | 13,300 | 04732399 |
| 675302 | Nov 22, 2008 | Nov 22, 2008 | Loudon Operating Company, L.L.C. | Lopez #7 | 11,820 | 04732130 |
| 675210 | Nov 21, 2008 | Nov 21, 2008 | Newfield Exploration Company | Martinez Gas Unit #1 | 12,500 | 04732398 |
| 675063 | Nov 19, 2008 | Nov 19, 2008 | Pogo Producing Company LLC | Lopez, H. #3 | 12,500 | 04732397 |
| 674978 | Nov 18, 2008 | Nov 18, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #630 | 13,000 | 04732396 |
| 674696 | Nov 15, 2008 | Nov 15, 2008 | Ballard Exploration Company,inc. | Bennett, Betsy "D" #1 | 6,550 | 04732196 |
| 674651 | Nov 15, 2008 | Nov 15, 2008 | Mestena Operating, Ltd. | La Presa #24 | 11,000 | 04732395 |
| 674522 | Nov 13, 2008 | Nov 13, 2008 | Pogo Producing Company LLC | Mills Bennett #3 | 9,400 | 04732394 |
| 671880 | Nov 12, 2008 | Nov 12, 2008 | Crimson Exploration Oper., Inc. | Cage Ranch #30 | 8,700 | 04732381 |
| 674429 | Nov 10, 2008 | Nov 10, 2008 | Mestena Operating, Ltd. | La Presa #23 | 11,000 | 04732393 |
| 674396 | Nov 10, 2008 | Nov 10, 2008 | Mestena Operating, Ltd. | La Presa #22 | 11,000 | 04732392 |
| 674254 | Nov 6, 2008 | Nov 6, 2008 | Mestena Operating, Ltd. | La Presa #21 | 11,000 | 04732391 |
| 673918 | Oct 31, 2008 | Oct 31, 2008 | Erskine Energy, LLC | Sullivan #24 | 13,500 | 04732390 |
| 673786 | Oct 27, 2008 | Oct 27, 2008 | Erskine Energy, LLC | Sullivan #23 | 13,500 | 04732389 |
| 673786Amendment | Oct 27, 2008 | Oct 27, 2008 | Erskine Energy, LLC | Sullivan #23 | 13,500 | 04732389 |
| 673563 | Oct 27, 2008 | Oct 27, 2008 | Newfield Exploration Company | Ramirez Gas Unit #2 | 13,000 | 04732387 |
| 673575 | Oct 25, 2008 | Oct 25, 2008 | Erskine Energy, LLC | Sullivan #22 | 13,000 | 04732388 |
| 672927 | Oct 16, 2008 | Oct 16, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #629 | 13,000 | 04732386 |
| 672927Amendment | Oct 16, 2008 | Oct 16, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #629 | 13,000 | 04732386 |
| 672924 | Oct 16, 2008 | Oct 16, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #628 | 13,000 | 42734439 |
| 672922 | Oct 16, 2008 | Oct 16, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #627 | 13,000 | 04732384 |
| 672894 | Oct 16, 2008 | Oct 16, 2008 | Crimson Exploration Oper., Inc. | Cage Ranch #31 | 9,200 | 04732383 |
| 672649 | Oct 13, 2008 | Oct 13, 2008 | Newfield Exploration Company | Santa FE Ranch #204 | 15,000 | 04732382 |
| 671876 | Oct 6, 2008 | Oct 6, 2008 | Pogo Producing Company LLC | Pard #1 | 9,350 | 04732380 |
| 671233 | Oct 1, 2008 | Oct 1, 2008 | Erskine Energy, LLC | Sullivan #20 | 12,684 | 04732378 |
| 671242 | Sep 29, 2008 | Sep 29, 2008 | Erskine Energy, LLC | Sullivan #21 | 13,500 | 04732379 |
| 670824 | Sep 26, 2008 | Sep 26, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #625 | 13,000 | 04732376 |
| 670824Amendment | Sep 26, 2008 | Sep 26, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #625 | 13,000 | 04732376 |
| 670935 | Sep 25, 2008 | Sep 25, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #626 | 12,200 | 04732377 |
| 670795 | Sep 25, 2008 | Sep 25, 2008 | Crimson Exploration Oper., Inc. | Cage Ranch #291 | 10,400 | 04732375 |
| 669249 | Sep 25, 2008 | Sep 25, 2008 | Crimson Exploration Oper., Inc. | Cage Ranch #17 | 10,000 | 04732071 |
| 670818 | Sep 19, 2008 | Sep 19, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #624 | 12,000 | 04732374 |
| 670818Amendment | Sep 19, 2008 | Sep 19, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #624 | 12,000 | 04732374 |
| 670319 | Sep 18, 2008 | Sep 18, 2008 | Newfield Exploration Company | Skipper #8 | 13,000 | 04732373 |
| 669707 | Sep 12, 2008 | Sep 12, 2008 | Exxon Mobil Corporation | Sullivan, D J "F" #39 | 9,900 | 04732372 |
| 669596 | Sep 10, 2008 | Sep 10, 2008 | Paladin Petroleum III, L.L.C. | Scott & Hopper #1 | 11,500 | 04732371 |
| 669251 | Sep 9, 2008 | Sep 9, 2008 | Crimson Exploration Oper., Inc. | Cage Ranch #7093 | 12,000 | 04731830 |
| 666415 | Aug 28, 2008 | Aug 28, 2008 | Erskine Energy, LLC | Sullivan #19 | 12,800 | 04732360 |
| 666415Amendment | Aug 28, 2008 | Aug 28, 2008 | Erskine Energy, LLC | Sullivan #19 | 12,800 | 04732360 |
| 668585 | Aug 27, 2008 | Aug 27, 2008 | Mestena Operating, Ltd. | La Presa #20 | 12,000 | 04732370 |
| 667933 | Aug 27, 2008 | Aug 27, 2008 | Premier Natural Resources, LLC | Hanna Trad #2 | 11,000 | 04732044 |
| 667933Amendment | Aug 27, 2008 | Aug 27, 2008 | Premier Natural Resources, LLC | Hanna Trad #2 | 11,000 | 04732044 |
| 668404 | Aug 25, 2008 | Aug 25, 2008 | Loudon Operating Company, L.L.C. | Lopez #4A | 12,900 | 04732143 |
| 668258 | Aug 21, 2008 | Aug 21, 2008 | Newfield Exploration Company | Santa FE Ranch #203 | 16,000 | 04732369 |
| 668155 | Aug 19, 2008 | Aug 19, 2008 | Mestena Operating, Ltd. | La Presa #19 | 12,000 | 04732368 |
| 668151 | Aug 19, 2008 | Aug 19, 2008 | Mestena Operating, Ltd. | La Presa #18 | 12,000 | 04732367 |
| 668151Amendment | Aug 19, 2008 | Aug 19, 2008 | Mestena Operating, Ltd. | La Presa #18 | 12,000 | 04732367 |
| 667976 | Aug 18, 2008 | Aug 18, 2008 | Mestena Operating, Ltd. | La Presa #17 | 12,000 | 04732365 |
| 667969 | Aug 18, 2008 | Aug 18, 2008 | Mestena Operating, Ltd. | La Presa #16 | 12,000 | 04732366 |
| 667951 | Aug 15, 2008 | Aug 15, 2008 | Erskine Energy, LLC | Perez-Alaniz Deep GU #A 2 | 15,000 | 04732364 |
| 667855 | Aug 15, 2008 | Aug 15, 2008 | Exxon Mobil Corporation | Sullivan, D. J. "F" #40 | 9,300 | 04732363 |
| 667279 | Aug 9, 2008 | Aug 9, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #621 | 12,000 | 04732362 |
| 666863 | Aug 4, 2008 | Aug 4, 2008 | Mestena Operating, Ltd. | La Presa #15 | 12,000 | 04732361 |
| 666863Amendment | Aug 4, 2008 | Aug 4, 2008 | Mestena Operating, Ltd. | La Presa #15 | 12,000 | 04732361 |
| 666426 | Jul 30, 2008 | Jul 30, 2008 | Synergy Oil & Gas, L.P. | Scott & Hopper G.U. 1 #7 | 8,426 | 04731930 |
| 665806 | Jul 22, 2008 | Jul 22, 2008 | SE USA Operating, Inc. | Scott & Hopper #1 | 11,067 | 04730298 |
| 665662 | Jul 21, 2008 | Jul 21, 2008 | Sue-Ann Operating, L.C. | D. J. Sullivan "B" #111 | 9,100 | 04732359 |
| 665660 | Jul 21, 2008 | Jul 21, 2008 | Sue-Ann Operating, L.C. | D. J. Sullivan "B" #110 | 9,100 | 04732358 |
| 665596 | Jul 18, 2008 | Jul 18, 2008 | Bopco, L.P. | El Coyote Ranch #7 | 13,505 | 04732357 |