| 488356 | Oct 11, 1999 | Oct 11, 1999 | Union Pacific Resources Company | Schroeder #1REH | 10,000 | 28730919 |
| 488356Amendment | Oct 11, 1999 | Oct 11, 1999 | Union Pacific Resources Company | Schroeder #1REH | 11,000 | 28730919 |
| 487795 | Sep 21, 1999 | Sep 21, 1999 | WCS Oil and Gas Corporation | Schulze, A. G. #1REH | 10,000 | 28730912 |
| 487056 | Aug 27, 1999 | Aug 27, 1999 | Union Pacific Resources Company | Ziehr, Lillian #1AH | 13,000 | 28731588 |
| 486333 | Aug 3, 1999 | Aug 3, 1999 | Holifield Oil Company | Vernon-Hoffman Unit #2REH | 10,200 | 28731907 |
| 485261 | Jun 28, 1999 | Jun 28, 1999 | CW Crockett, Inc | Mitchel, Buford P. #1REH | 8,980 | 28730784 |
| 483500 | Mar 26, 1999 | Mar 26, 1999 | Bar-Mac Investments Inc. | Gerdes, Garwood #1 | 5,200 | 28732502 |
| 483500Amendment | Mar 26, 1999 | Mar 26, 1999 | Bar-Mac Investments Inc. | Gerdes, Garwood #1 | 5,200 | 28732502 |
| 483035 | Mar 11, 1999 | Mar 11, 1999 | U. S. Operating, Inc. | Nora #1RE | 9,200 | 28731339 |
| 482155 | Feb 17, 1999 | Feb 17, 1999 | WCS Oil and Gas Corporation | Benjamin #1REH | 10,000 | 28732071 |
| 482155Amendment | Feb 17, 1999 | Feb 17, 1999 | WCS Oil and Gas Corporation | Benjamin #1REH | 10,000 | 28732071 |
| 479655 | Oct 8, 1998 | Oct 8, 1998 | U. S. Operating, Inc. | Susan Marie #1REH | 8,400 | 28731200 |
| 479655Amendment | Oct 8, 1998 | Oct 8, 1998 | U. S. Operating, Inc. | Susan Marie #1REH | 10,194 | 28731200 |
| 479655Amendment | Oct 8, 1998 | Oct 8, 1998 | U. S. Operating, Inc. | Susan Marie #1RE | 8,149 | 28731200 |
| 479351 | Sep 15, 1998 | Sep 15, 1998 | Heartland Resources, Inc. | Hri - Weise A #2 | 3,160 | 28732154 |
| 477648 | Sep 15, 1998 | Sep 15, 1998 | Tanglewood Oil & Gas Co. | Reim, Milton #1H | 9,000 | 28730592 |
| 477648Amendment | Sep 15, 1998 | Sep 15, 1998 | Tanglewood Oil & Gas Co. | Reim, Milton #1H | 9,000 | 28730592 |
| 479209 | Sep 2, 1998 | Sep 2, 1998 | Union Pacific Resources Company | Dees Unit #1 | 13,000 | 28732369 |
| 478739 | Aug 19, 1998 | Aug 19, 1998 | U. S. Operating, Inc. | Melissa #1REH | 8,900 | 28730988 |
| 478678 | Aug 12, 1998 | Aug 12, 1998 | WCS Oil and Gas Corporation | Pamela K. #1H | 9,000 | 28730831 |
| 477715 | Jul 3, 1998 | Jul 3, 1998 | Bar-Mac Investments Inc. | Gerdes Development Co. #4 | 4,001 | 28732501 |
| 476119 | May 13, 1998 | May 13, 1998 | Union Pacific Resources Company | Lillie Unit #1H | 9,000 | 28731224 |
| 475991 | May 5, 1998 | May 5, 1998 | Union Pacific Resources Company | Ozias Unit #1H | 8,900 | 28731086 |
| 475277 | Apr 29, 1998 | Apr 29, 1998 | Morris, W. Dale Inc. | Droemer, W. et al Townsite #1H | 10,250 | 28730361 |
| 475336 | Apr 15, 1998 | Apr 15, 1998 | Union Pacific Resources Company | Lenoise Unit #1H | 10,000 | 28731192 |
| 475135 | Apr 8, 1998 | Apr 8, 1998 | Union Pacific Resources Company | Tuna Unit #1 | 11,000 | 28732500 |
| 474306 | Mar 12, 1998 | Mar 12, 1998 | Stanton Mineral Development Inc | Arldt B #1 | 6,000 | 28732499 |
| 473744 | Feb 24, 1998 | Feb 24, 1998 | Stanton Mineral Development Inc | Arldt "A" #1 | 6,000 | 28732498 |
| 472319 | Jan 20, 1998 | Jan 20, 1998 | Union Pacific Resources Company | Red Snapper #1 | 12,500 | 28732497 |
| 472319Amendment | Jan 20, 1998 | Jan 20, 1998 | Union Pacific Resources Company | Red Snapper #1 | 12,000 | 28732497 |
| 472055 | Jan 12, 1998 | Jan 12, 1998 | Heartland Resources, Inc. | Chapple-Rosenbaum Unit #2 | 3,300 | 28732496 |
| 472055Amendment | Jan 12, 1998 | Jan 12, 1998 | Heartland Resources, Inc. | Chapple-Rosenbaum Unit #2 | 3,254 | 28732496 |
| 471859 | Jan 5, 1998 | Jan 5, 1998 | Browning Oil Company, Inc. | Gregory, Margaret #1REH | 9,000 | 28731054 |
| 471385 | Dec 18, 1997 | Dec 18, 1997 | Union Pacific Resources Company | Logan-Bagby Unit #1H | 10,000 | 28730489 |
| 470850 | Dec 5, 1997 | Dec 5, 1997 | Union Pacific Resources Company | Kuehn-Carpenter Unit #1H | 8,800 | 28730332 |
| 470774 | Dec 3, 1997 | Dec 3, 1997 | Stanton Mineral Development Inc | Ardlt #1 | 5,600 | 28732495 |
| 470774Amendment | Dec 3, 1997 | Dec 3, 1997 | Stanton Mineral Development Inc | Ardlt #1 | 6,000 | 28732495 |
| 470464 | Nov 24, 1997 | Nov 24, 1997 | U. S. Operating, Inc. | Tracy #1REH | 9,000 | 28730645 |
| 470464Amendment | Nov 24, 1997 | Nov 24, 1997 | U. S. Operating, Inc. | Tracy #1REH | 9,083 | 28730645 |
| 469649 | Nov 6, 1997 | Nov 6, 1997 | U. S. Operating, Inc. | Darlene #2REH | 11,000 | 28731751 |
| 469649Amendment | Nov 6, 1997 | Nov 6, 1997 | U. S. Operating, Inc. | Darlene #2REH | 8,331 | 28731751 |
| 469630 | Nov 6, 1997 | Nov 6, 1997 | Cirrus Production Company | Schacherl #1 | 8,169 | 28730349 |
| 469456 | Oct 30, 1997 | Oct 30, 1997 | Union Pacific Resources Company | Hellscher-White Unit #1H | 9,000 | 28731647 |
| 469031 | Oct 21, 1997 | Oct 21, 1997 | Union Pacific Resources Company | Davis, Mollie C. #3REH | 8,800 | 28731371 |
| 468698 | Oct 10, 1997 | Oct 10, 1997 | Keystone Exploration, Inc | Acts Unit #2H | 8,156 | 28731604 |
| 468698Amendment | Oct 10, 1997 | Oct 10, 1997 | United Oil & Minerals, Inc. | Acts Unit #2H | 9,267 | 28731604 |
| 468316 | Oct 2, 1997 | Oct 2, 1997 | Union Pacific Resources Company | Swordfish Unit #1 | 11,000 | 28732494 |
| 467964 | Sep 24, 1997 | Sep 24, 1997 | Union Pacific Resources Company | Rost Unit #1H | 8,850 | 28732249 |
| 467626 | Sep 16, 1997 | Sep 16, 1997 | Union Pacific Resources Company | Oley Unit #2H | 9,200 | 28731447 |
| 466551 | Aug 21, 1997 | Aug 21, 1997 | Union Pacific Resources Company | Tillie Unit #1H | 9,300 | 28730403 |
| 466551Amendment | Aug 21, 1997 | Aug 21, 1997 | Union Pacific Resources Company | Tillie Unit #1H | 9,300 | 28730403 |
| 466124 | Aug 11, 1997 | Aug 11, 1997 | Stanton Mineral Development Inc | Richter #1D | 5,600 | 28732493 |
| 465573 | Jul 29, 1997 | Jul 29, 1997 | Union Pacific Resources Company | Lehmann-Blume #1REH | 9,200 | 28730700 |
| 464831 | Jul 14, 1997 | Jul 14, 1997 | Union Pacific Resources Company | Kimberly Unit #2HH | 9,600 | 28731732 |
| 463954 | Jun 18, 1997 | Jun 18, 1997 | Rosewood Resources, Inc. | Falkenberg "A" #3H | 9,810 | 28731649 |
| 463954Amendment | Jun 18, 1997 | Jun 18, 1997 | Rosewood Resources, Inc. | Falkenberg "A" #3H | 9,900 | 28731649 |
| 463303 | Jun 4, 1997 | Jun 4, 1997 | Browning Oil Company, Inc. | Kocurek, Arnold J. #1 | 7,950 | 28730287 |
| 463286 | Jun 4, 1997 | Jun 4, 1997 | Union Pacific Resources Company | Marva Unit #1REH | 9,000 | 28730360 |
| 462773 | May 22, 1997 | May 22, 1997 | Stanton Mineral Development Inc | Richter "B" #1 | 5,600 | 28732490 |
| 462699 | May 21, 1997 | May 21, 1997 | Stanton Mineral Development Inc | Richter "C" #1 | 5,600 | 28732491 |
| 462698 | May 21, 1997 | May 21, 1997 | Stanton Mineral Development Inc | Richter "A" #1 | 5,600 | 28732492 |
| 461310 | Apr 24, 1997 | Apr 24, 1997 | Union Pacific Resources Company | Cleopatra Unit #1REH | 8,900 | 28730524 |
| 460815 | Apr 9, 1997 | Apr 9, 1997 | Union Pacific Austin Chalk Co. | Lawrence #1REH | 8,900 | 28730588 |
| 460399 | Mar 27, 1997 | Mar 27, 1997 | Keystone Exploration, Inc | Acts #1H | 8,233 | 28731561 |
| 459548 | Mar 11, 1997 | Mar 11, 1997 | Union Pacific Resources Company | Vicki "A" #1REH | 8,700 | 28730377 |
| 459611 | Mar 7, 1997 | Mar 7, 1997 | Costilla Energy, Inc. | Baldridge, P. #1H | 15,000 | 28730335 |
| 458879 | Feb 20, 1997 | Feb 20, 1997 | Union Pacific Austin Chalk Co. | Lauderdale, Josie #1RE | 10,000 | 28731038 |
| 458573 | Feb 13, 1997 | Feb 13, 1997 | Stanton Mineral Development Inc | Blasig #2 | 5,600 | 28732489 |
| 458036 | Feb 4, 1997 | Feb 4, 1997 | Union Pacific Resources Company | Carlisle #1H | 7,200 | 28732488 |
| 457745 | Jan 28, 1997 | Jan 28, 1997 | Union Pacific Austin Chalk Co. | Brenda #1REH | 9,500 | 28732449 |
| 457225 | Jan 10, 1997 | Jan 10, 1997 | Union Pacific Resources Company | Debbie #2REH | 8,900 | 28732188 |
| 457224 | Jan 10, 1997 | Jan 10, 1997 | Union Pacific Austin Chalk Co. | Kimberly South #1REH | 9,600 | 28731760 |
| 456524 | Dec 23, 1996 | Dec 23, 1996 | Union Pacific Resources Company | Luecke Unit #1REH | 8,400 | 28732378 |
| 455995 | Dec 6, 1996 | Dec 6, 1996 | Union Pacific Resources Company | Kolache Unit #1H | 8,000 | 28732487 |
| 455646 | Dec 2, 1996 | Dec 2, 1996 | C&M Equipment & Leasing Co., Inc | Bell, Carol "B" #2 | 5,900 | 28732486 |
| 455647 | Nov 27, 1996 | Nov 27, 1996 | San Antonio Gas & Oil, Inc. | Dolores #1 | 5,900 | 28732485 |
| 455252 | Nov 18, 1996 | Nov 18, 1996 | Stanton Mineral Development Inc | Blasig #1 | 5,600 | 28732484 |
| 455234 | Nov 15, 1996 | Nov 15, 1996 | WCS Oil and Gas Corporation | Harrell-Colvin Unit #1REH | 15,000 | 28731729 |
| 454774 | Nov 8, 1996 | Nov 8, 1996 | Union Pacific Resources Company | Mantzel Unit #1REH | 8,900 | 28730583 |
| 453650 | Oct 10, 1996 | Oct 10, 1996 | Union Pacific Austin Chalk Co. | Fox Unit #1REH | 8,700 | 28730111 |
| 450968 | Sep 25, 1996 | Sep 25, 1996 | Union Pacific Austin Chalk Co. | Melanie Unit #1REH | 10,500 | 28731610 |
| 452691 | Sep 24, 1996 | Sep 24, 1996 | Heartland Resources, Inc. | Chapple-Rosenbaum Unit #1 | 3,250 | 28732483 |
| 452988 | Sep 23, 1996 | Sep 23, 1996 | Union Pacific Austin Chalk Co. | Sylvia Sacks Unit #2RE | 9,000 | 28732308 |
| 452988Amendment | Sep 23, 1996 | Sep 23, 1996 | Union Pacific Austin Chalk Co. | Sylvia Sacks Unit #2RE | 9,000 | 28732308 |
| 451734 | Aug 26, 1996 | Aug 26, 1996 | Union Pacific Austin Chalk Co. | Stranger, T. #2REH | 9,000 | 28730740 |
| 451734Amendment | Aug 26, 1996 | Aug 26, 1996 | Union Pacific Austin Chalk Co. | Stranger, T. #2REH | 9,000 | 28730740 |
| 451493 | Aug 23, 1996 | Aug 23, 1996 | Union Pacific Resources Company | Mabel Unit #2REH | 8,700 | 28731901 |
| 451823 | Aug 22, 1996 | Aug 22, 1996 | Bar-Mac Investments Inc. | Ches #1 | 5,000 | 28732482 |
| 451580 | Aug 21, 1996 | Aug 21, 1996 | Union Pacific Austin Chalk Co. | Jensen #7REH | 9,000 | 28731473 |
| 451580Amendment | Aug 21, 1996 | Aug 21, 1996 | Union Pacific Austin Chalk Co. | Jensen #7REH | 9,000 | 28731473 |
| 451494 | Aug 21, 1996 | Aug 21, 1996 | Union Pacific Resources Company | Erin Unit #2REH | 8,600 | 28732130 |
| 450056 | Aug 19, 1996 | Aug 19, 1996 | U. S. Operating, Inc. | Daisy Unit #2REH | 8,600 | 28731522 |
| 451164 | Aug 6, 1996 | Aug 6, 1996 | Union Pacific Austin Chalk Co. | Daniel "B" #1REH | 8,600 | 28731726 |
| 450879 | Aug 1, 1996 | Aug 1, 1996 | Union Pacific Resources Company | Florence Unit #1REH | 9,000 | 28730434 |
| 450528 | Jul 18, 1996 | Jul 18, 1996 | Union Pacific Resources Company | Hielscher "B" #2REH | 8,500 | 28731626 |
| 450275 | Jul 12, 1996 | Jul 12, 1996 | Exxon Corp. | Branch - Smith Unit No. 1 #6HH | 9,100 | 28732343 |
| 450150 | Jul 9, 1996 | Jul 9, 1996 | Heartland Resources, Inc. | Chapple-Rosenbaum #3 | 3,300 | 28730767 |
| 450150Amendment | Jul 9, 1996 | Jul 9, 1996 | Heartland Resources, Inc. | Chapple-Rosenbaum #3 | 3,300 | 28730767 |
| 450006 | Jul 9, 1996 | Jul 9, 1996 | Union Pacific Resources Company | Sorrell-Walker Unit #1REH | 8,900 | 28732423 |
| 449510 | Jun 20, 1996 | Jun 20, 1996 | Arrow Exploration Company | Suburban #2H | 8,400 | 28730015 |