| 330230 | May 15, 1987 | May 15, 1987 | Diamond Shamrock Exploration Co. | Lipscomb | Piper, Ola O. #11 | 10,300 | 29531740 |
| 329975 | May 12, 1987 | May 12, 1987 | Diamond Shamrock Exploration Co. | Ochiltree | Dickinson, Charles P. #2400 | 9,500 | 35731869 |
| 329974 | May 12, 1987 | May 12, 1987 | Diamond Shamrock Exploration Co. | Ochiltree | Morrison, Mary T. "C" #3 | 9,950 | 35731868 |
| 329521 | Apr 27, 1987 | Apr 27, 1987 | Diamond Shamrock Exploration Co. | Ochiltree | Dickinson, Charles P. "B" #2 | 10,400 | 35731865 |
| 325532 | Mar 30, 1987 | Mar 30, 1987 | Diamond Shamrock Exploration Co. | Roberts | Killebrew, C. P. et al "A" #3 | 10,200 | 39331105 |
| 326294 | Mar 18, 1987 | Mar 18, 1987 | Diamond Shamrock Exploration Co. | Ochiltree | McLain, Glen #2095 | 9,750 | 35731861 |
| 320005 | Mar 16, 1987 | Mar 16, 1987 | Diamond Shamrock Exploration Co. | Ochiltree | Wamble, R. E. Estate "D" #2 | 9,050 | 35731838 |
| 327587 | Mar 12, 1987 | Mar 12, 1987 | Diamond Shamrock Exploration Co. | Hemphill | Lockhart, Thomas Howard et Al #1058 | 11,300 | 21131859 |
| 327255 | Mar 4, 1987 | Mar 4, 1987 | Diamond Shamrock Exploration Co. | Hemphill | Coleman-Graham #6 | 11,450 | 21131857 |
| 327236 | Mar 3, 1987 | Mar 3, 1987 | Diamond Shamrock Exploration Co. | Moore | Robertson "B" #5 | 2,000 | 34131974 |
| 326983 | Feb 26, 1987 | Feb 26, 1987 | Diamond Shamrock Exploration Co. | Sherman | Flores #30 | 3,400 | 42130383 |
| 324546 | Feb 23, 1987 | Feb 23, 1987 | Diamond Shamrock Exploration Co. | Ochiltree | Shrader, Paul W. #3 | 9,300 | 35731858 |
| 326174 | Feb 9, 1987 | Feb 9, 1987 | Diamond Shamrock Exploration Co. | Ochiltree | Richardson, V. W. "B" #1 | 7,030 | 35730066 |
| 325982 | Jan 29, 1987 | Jan 29, 1987 | Diamond Shamrock Exploration Co. | Ochiltree | McLain, Samuel "D" #1 | 9,760 | 35702358 |
| 325117 | Jan 29, 1987 | Jan 29, 1987 | Diamond Shamrock Exploration Co. | Ochiltree | Tregellas, W. T. "B" #1648 | 9,900 | 35731859 |
| 325896 | Jan 26, 1987 | Jan 26, 1987 | Diamond Shamrock Exploration Co. | Roberts | Morrison, Mary T. "J" #5 | 11,100 | 39331107 |
| 325492 | Jan 19, 1987 | Jan 19, 1987 | Diamond Shamrock Exploration Co. | Moore | Coffee "E" #2 | 3,500 | 34131967 |
| 324365 | Dec 16, 1986 | Dec 16, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Kunkel, Daniel E. #2 | 9,450 | 35731856 |
| 324365Amendment | Dec 16, 1986 | Dec 16, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Kunkel, Daniel E. #2 | 9,450 | 35731856 |
| 324094 | Dec 8, 1986 | Dec 8, 1986 | Diamond Shamrock Exploration Co. | Sutton | Askew #2076 | 6,600 | 43533322 |
| 323344 | Nov 24, 1986 | Nov 24, 1986 | Diamond Shamrock Exploration Co. | Fisher | Alldridge #1015 | 6,500 | 15132118 |
| 320457 | Nov 7, 1986 | Nov 7, 1986 | Diamond Shamrock Exploration Co. | Lipscomb | Wheat #1 | 11,150 | 29531723 |
| 322805 | Nov 6, 1986 | Nov 6, 1986 | Diamond Shamrock Exploration Co. | Lipscomb | Walton, Augusta #2610 | 10,450 | 29531726 |
| 322419 | Oct 30, 1986 | Oct 30, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Murray, Vera M. #1365 | 11,150 | 21131846 |
| 322418 | Oct 30, 1986 | Oct 30, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Murray, Vera M. #1418 | 11,150 | 21131847 |
| 322308 | Oct 24, 1986 | Oct 24, 1986 | Diamond Shamrock Exploration Co. | Moore | Read "C" #2 | 3,600 | 34131944 |
| 321619 | Oct 8, 1986 | Oct 8, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Mekeel, Leland E. "E" #2 | 11,000 | 35731845 |
| 322299 | Sep 22, 1986 | Sep 22, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Conrad, Morrison Scott "W" #2 | 10,900 | 35731848 |
| 320784 | Sep 19, 1986 | Sep 19, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | McGarraugh Etal "G" #5138 | 11,000 | 35731842 |
| 320711 | Sep 15, 1986 | Sep 15, 1986 | Diamond Shamrock Exploration Co. | Roberts | Parsell, Warren B. et al "A" #2035 | 11,000 | 39331092 |
| 320709 | Sep 15, 1986 | Sep 15, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | McGarraugh, C. S. et Al #2 | 11,000 | 35731841 |
| 305781 | Aug 29, 1986 | Aug 29, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Jarvis, Billy & Sons, Inc. "A" #3 | 7,230 | 21130568 |
| 305754 | Aug 28, 1986 | Aug 28, 1986 | Diamond Shamrock Exploration Co. | Glasscock | Calverley, Theora #4036 | 8,200 | 17331958 |
| 323880 | Aug 26, 1986 | Aug 26, 1986 | Diamond Shamrock Exploration Co. | Roberts | Morrison, Scott, Conrad "M" #2 | 11,100 | 39331100 |
| 323879 | Aug 26, 1986 | Aug 26, 1986 | Diamond Shamrock Exploration Co. | Roberts | Parsell, Warren B. Etal "I" #4168 | 11,100 | 39331101 |
| 305591 | Aug 25, 1986 | Aug 25, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Flowers, Clem G. #2 | 10,250 | 35731836 |
| 305593 | Aug 22, 1986 | Aug 22, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Mekeel, Leland E. #2 | 10,550 | 35731837 |
| 305593Amendment | Aug 22, 1986 | Aug 22, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Mekeel, Leland E. #2 | 10,550 | 35731837 |
| 305399 | Aug 18, 1986 | Aug 18, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Morrison, Mary T. et al "C" #2 | 11,000 | 35731835 |
| 305282 | Aug 11, 1986 | Aug 11, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Holland, R. H. #2 | 9,800 | 35731834 |
| 305282Amendment | Aug 11, 1986 | Aug 11, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Holland, R. H. #2 | 9,800 | 35731834 |
| 304989 | Aug 6, 1986 | Aug 6, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Murray, Vera M. #1265 | 11,150 | 21131839 |
| 304322 | Jul 10, 1986 | Jul 10, 1986 | Diamond Shamrock Exploration Co. | Hansford | Steele, J. I. "E" #3 | 7,730 | 19530989 |
| 303781 | Jul 1, 1986 | Jul 1, 1986 | Diamond Shamrock Exploration Co. | Lipscomb | Schoenhals, Valentine "A" #3 | 10,560 | 29531281 |
| 303577 | Jun 25, 1986 | Jun 25, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Odc #2053 | 8,000 | 35730225 |
| 303332 | Jun 17, 1986 | Jun 17, 1986 | Diamond Shamrock Exploration Co. | Lipscomb | Merydith, W. C. et UX #1557 | 10,100 | 29531715 |
| 302871 | Jun 2, 1986 | Jun 2, 1986 | Diamond Shamrock Exploration Co. | Roberts | Killebrew, C. P. et al "A" #4 | 10,850 | 39331088 |
| 302543 | May 27, 1986 | May 27, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Murray, Vera M. #1165 | 11,100 | 21131833 |
| 302482 | May 27, 1986 | May 27, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Isaacs, John C. Jr. et Al #3199 | 11,550 | 21131831 |
| 302485 | May 23, 1986 | May 23, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Murray, Vera M. #1018 | 11,100 | 21131832 |
| 302472 | May 23, 1986 | May 23, 1986 | Diamond Shamrock Exploration Co. | Lipscomb | Barton, JO et Al #4511 | 9,800 | 29531711 |
| 302486 | May 23, 1986 | May 23, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Boisdorf, Genevieve G. #2 | 8,625 | 35731732 |
| 301777 | May 2, 1986 | May 2, 1986 | Diamond Shamrock Exploration Co. | Sherman | Bywater Estate #4 | 3,350 | 42130368 |
| 300571 | Apr 3, 1986 | Apr 3, 1986 | Diamond Shamrock Exploration Co. | Glasscock | Calverley, Steve Jr. "B" #1014 | 8,200 | 17331947 |
| 300566 | Apr 3, 1986 | Apr 3, 1986 | Diamond Shamrock Exploration Co. | Glasscock | Calverley, Theora #3032 | 8,000 | 17331946 |
| 300050 | Mar 24, 1986 | Mar 24, 1986 | Diamond Shamrock Exploration Co. | Moore | Flores #29 | 3,350 | 34131901 |
| 300050Amendment | Mar 24, 1986 | Mar 24, 1986 | Diamond Shamrock Exploration Co. | Moore | Flores #29 | 3,350 | 34131901 |
| 299145 | Mar 7, 1986 | Mar 7, 1986 | Diamond Shamrock Exploration Co. | Lipscomb | Cowan, R. H. Jr. #2 | 9,800 | 29531697 |
| 298994 | Mar 5, 1986 | Mar 5, 1986 | Diamond Shamrock Exploration Co. | Lipscomb | Kelln, David A. et Al #4 | 11,049 | 29531695 |
| 298994Amendment | Mar 5, 1986 | Mar 5, 1986 | Diamond Shamrock Exploration Co. | Lipscomb | Kelln, David A. et Al #4 | 11,049 | 29531695 |
| 298641 | Feb 26, 1986 | Feb 26, 1986 | Diamond Shamrock Exploration Co. | Glasscock | Calverley 24 #9 | 8,100 | 17331943 |
| 298631 | Feb 26, 1986 | Feb 26, 1986 | Diamond Shamrock Exploration Co. | Lipscomb | Wright #2075 | 11,250 | 29531694 |
| 298636 | Feb 25, 1986 | Feb 25, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Brown, J. T. et al "D" #11 | 12,250 | 21131823 |
| 298350 | Feb 19, 1986 | Feb 19, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Mekeel, Leland E. "B" #1 | 9,370 | 35700413 |
| 297653 | Feb 13, 1986 | Feb 13, 1986 | Diamond Shamrock Exploration Co. | Frio | Big Foot Olmos "B" Unit #7016 | 3,450 | 16300574 |
| 297584 | Feb 11, 1986 | Feb 11, 1986 | Diamond Shamrock Exploration Co. | Moore | McDowell #14 | 3,250 | 34131895 |
| 297275 | Feb 10, 1986 | Feb 10, 1986 | Diamond Shamrock Exploration Co. | Parker | Byers Gas Unit #3 | 6,100 | 36732979 |
| 297452 | Feb 3, 1986 | Feb 3, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Brown, Charles E. et al "A" #4 | 11,800 | 21131821 |
| 296919 | Jan 24, 1986 | Jan 24, 1986 | Diamond Shamrock Exploration Co. | Roberts | Chambers, Frank M. et al "C" #8 | 12,005 | 39331028 |
| 295024 | Jan 10, 1986 | Jan 10, 1986 | Diamond Shamrock Exploration Co. | Ochiltree | Mekeel, Leland E. et al "B" #2 | 10,600 | 35731809 |
| 295198 | Jan 10, 1986 | Jan 10, 1986 | Diamond Shamrock Exploration Co. | Hemphill | Coleman-Graham #6 | 11,450 | 21131857 |
| 294956 | Jan 10, 1986 | Jan 10, 1986 | Diamond Shamrock Exploration Co. | Parker | Byers Gas Unit #2 | 5,250 | 36731875 |
| 294686 | Jan 8, 1986 | Jan 8, 1986 | Diamond Shamrock Exploration Co. | Frio | Bohl, Annie #1 | 3,650 | 16300143 |
| 294716 | Jan 3, 1986 | Jan 3, 1986 | Diamond Shamrock Exploration Co. | Glasscock | Calverley, Steve Jr. "B" #9014 | 8,200 | 17331930 |
| 293533 | Dec 27, 1985 | Dec 27, 1985 | Diamond Shamrock Exploration Co. | Hemphill | Murray, Vera M. #9018 | 11,100 | 21131813 |
| 293855 | Dec 23, 1985 | Dec 23, 1985 | Diamond Shamrock Exploration Co. | Parker | Moorefield, Joseph C. #4 | 6,100 | 36732969 |
| 293258 | Dec 19, 1985 | Dec 19, 1985 | Diamond Shamrock Exploration Co. | Hemphill | Coleman-Graham #5 | 11,800 | 21131811 |
| 293532 | Dec 17, 1985 | Dec 17, 1985 | Diamond Shamrock Exploration Co. | Hemphill | Murray, Vera M. #9018 | 11,100 | 21131813 |
| 292969 | Dec 17, 1985 | Dec 17, 1985 | Diamond Shamrock Exploration Co. | Ochiltree | McLain, Samuel "D" #2 | 9,750 | 35731802 |
| 293040 | Dec 13, 1985 | Dec 13, 1985 | Diamond Shamrock Exploration Co. | Ochiltree | Rifenburg, Ida O. #4 | 9,050 | 35731803 |
| 292015 | Dec 6, 1985 | Dec 6, 1985 | Diamond Shamrock Exploration Co. | Ochiltree | McGarraugh et al "G" #4138 | 11,000 | 35731797 |
| 291392 | Dec 2, 1985 | Dec 2, 1985 | Diamond Shamrock Exploration Co. | Ochiltree | Mekeel, Leland E. "B" #1 | 10,600 | 35700413 |
| 291721 | Nov 26, 1985 | Nov 26, 1985 | Diamond Shamrock Exploration Co. | Roberts | Chambers, Frank M. et al "C" #9 | 11,000 | 39331067 |
| 291481 | Nov 26, 1985 | Nov 26, 1985 | Diamond Shamrock Exploration Co. | Sutton | Zapata #1021 | 6,400 | 43533277 |
| 289300 | Nov 6, 1985 | Nov 6, 1985 | Diamond Shamrock Exploration Co. | Glasscock | Calverly, Steve Jr. "B" #7014 | 8,200 | 17331913 |
| 289019 | Oct 31, 1985 | Oct 31, 1985 | Diamond Shamrock Exploration Co. | Ochiltree | McCalmont, Amelia A. #4 | 8,600 | 35731773 |
| 288324 | Oct 24, 1985 | Oct 24, 1985 | Diamond Shamrock Exploration Co. | Ochiltree | Dudley #4032 | 7,700 | 35731769 |
| 288329 | Oct 24, 1985 | Oct 24, 1985 | Diamond Shamrock Exploration Co. | Ochiltree | Buckminster #313 | 9,000 | 35731770 |
| 288034 | Oct 22, 1985 | Oct 22, 1985 | Diamond Shamrock Exploration Co. | Lipscomb | Schoenhals, Valentine "C" #3 | 9,800 | 29531671 |
| 287609 | Oct 15, 1985 | Oct 15, 1985 | Diamond Shamrock Exploration Co. | Glasscock | Calverley 24 #9 | 8,000 | 17331904 |
| 287258 | Oct 10, 1985 | Oct 10, 1985 | Diamond Shamrock Exploration Co. | Hemphill | Hoobler #2096 | 11,100 | 21131893 |
| 286577 | Oct 7, 1985 | Oct 7, 1985 | Diamond Shamrock Exploration Co. | Hemphill | Teague, Lawrence #2 | 12,000 | 21131796 |
| 286726 | Oct 4, 1985 | Oct 4, 1985 | Diamond Shamrock Exploration Co. | Frio | Frio Olmos "B" Unit #1018 | 3,600 | 16332441 |
| 286726Amendment | Oct 4, 1985 | Oct 4, 1985 | Diamond Shamrock Exploration Co. | Frio | Olmos "B" Unit #1018 | 3,600 | 16332441 |
| 286279 | Oct 2, 1985 | Oct 2, 1985 | Diamond Shamrock Exploration Co. | Ochiltree | Carter, Leona et Al #3 | 7,000 | 35731762 |
| 286244 | Oct 2, 1985 | Oct 2, 1985 | Diamond Shamrock Exploration Co. | Moore | Atcheson #3 | 3,800 | 34131836 |
| 286193 | Oct 1, 1985 | Oct 1, 1985 | Diamond Shamrock Exploration Co. | Lipscomb | Barton, JO et Al #3511 | 9,800 | 29531665 |
| 286331 | Sep 30, 1985 | Sep 30, 1985 | Diamond Shamrock Exploration Co. | Sherman | Hill Estate "B" #2 | 3,500 | 42130361 |
| 286176 | Sep 30, 1985 | Sep 30, 1985 | Diamond Shamrock Exploration Co. | Sutton | Zapata #1021 | 6,400 | 43533277 |
| 298798 | Sep 30, 1985 | Sep 30, 1985 | Diamond Shamrock Exploration Co. | Ochiltree | Morrison et al "F" 53 #3 | 10,950 | 35731820 |