| 384191Amendment | Feb 6, 1991 | Feb 6, 1991 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #62 | 10,500 | 50532760 |
| 383754 | Jan 22, 1991 | Jan 22, 1991 | Pennzoil Exploration & Prod. Co. | Nueces | Rivers, M. L. #7 | 10,300 | 35532839 |
| 383754Amendment | Jan 22, 1991 | Jan 22, 1991 | Pennzoil Exploration & Prod. Co. | Nueces | Rivers, M. L. #7 | 10,300 | 35532839 |
| 383583 | Jan 17, 1991 | Jan 17, 1991 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #61 | 9,000 | 50532751 |
| 383359 | Jan 11, 1991 | Jan 11, 1991 | Pennzoil Exploration & Prod. Co. | Panola | Chadwick Unit #7 | 8,300 | 36532426 |
| 383359Amendment | Jan 11, 1991 | Jan 11, 1991 | Pennzoil Exploration & Prod. Co. | Panola | Chadwick Unit #7 | 6,800 | 36532426 |
| 383358 | Jan 11, 1991 | Jan 11, 1991 | Pennzoil Exploration & Prod. Co. | Panola | Mangham Unit #7 | 8,300 | 36532427 |
| 383358Amendment | Jan 11, 1991 | Jan 11, 1991 | Pennzoil Exploration & Prod. Co. | Panola | Mangham Unit #7 | 8,300 | 36532427 |
| 382416 | Dec 14, 1990 | Dec 14, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Walton, Irene R. #B 4 D | 8,340 | 35531410 |
| 381977 | Dec 5, 1990 | Dec 5, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | La Jolla #3 | 12,500 | 35532834 |
| 381920 | Dec 4, 1990 | Dec 4, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Tiller, G. C. #4 | 3,100 | 36532416 |
| 381395 | Nov 28, 1990 | Nov 28, 1990 | Pennzoil Exploration & Prod. Co. | Bee | Ray, George A. #89 | 8,011 | 02530305 |
| 381272 | Nov 26, 1990 | Nov 26, 1990 | Pennzoil Exploration & Prod. Co. | Bee | N.P.U.-Ray #9L | 8,100 | 02530303 |
| 380890 | Nov 16, 1990 | Nov 16, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hancock Unit #5 | 7,800 | 36532409 |
| 380888 | Nov 15, 1990 | Nov 15, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Shaw Unit #7 | 7,800 | 36532408 |
| 380888Amendment | Nov 15, 1990 | Nov 15, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Shaw Unit #7 | 8,000 | 36532408 |
| 380887 | Nov 14, 1990 | Nov 14, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Thompson Unit #7 | 7,800 | 36532410 |
| 380886 | Nov 14, 1990 | Nov 14, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hall Unit #6 | 7,800 | 36532411 |
| 380570 | Nov 9, 1990 | Nov 9, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Roberts Unit #7 | 9,800 | 36532406 |
| 380495 | Nov 7, 1990 | Nov 7, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Wilson Unit #5 | 9,800 | 36532405 |
| 380119 | Nov 1, 1990 | Nov 1, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #57 | 2,310 | 50532099 |
| 380118 | Nov 1, 1990 | Nov 1, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #51 | 2,309 | 50531742 |
| 379928 | Oct 26, 1990 | Oct 26, 1990 | Pennzoil Exploration & Prod. Co. | Schleicher | Barrow #6 | 6,700 | 41331743 |
| 379927 | Oct 26, 1990 | Oct 26, 1990 | Pennzoil Exploration & Prod. Co. | Schleicher | Barrow #5 | 6,700 | 41331742 |
| 379788 | Oct 18, 1990 | Oct 18, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Trevino, Albert #B 4 | 14,000 | 50532728 |
| 379788Amendment | Oct 18, 1990 | Oct 18, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Trevino, Albert #B 4 | 14,000 | 50532728 |
| 379703 | Oct 17, 1990 | Oct 17, 1990 | Pennzoil Exploration & Prod. Co. | Matagorda | Northern Ranch #11 | 8,000 | 32131637 |
| 379703Amendment | Oct 17, 1990 | Oct 17, 1990 | Pennzoil Exploration & Prod. Co. | Matagorda | Northern Ranch #11 | 8,000 | 32131637 |
| 379468 | Oct 17, 1990 | Oct 17, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 55 | 7,800 | 36532402 |
| 379083 | Oct 16, 1990 | Oct 16, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 53 | 7,800 | 36532398 |
| 379083Amendment | Oct 16, 1990 | Oct 16, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 53 | 8,100 | 36532398 |
| 379172 | Oct 12, 1990 | Oct 12, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Roberts Unit #2 | 6,497 | 36501444 |
| 379082 | Oct 12, 1990 | Oct 12, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 54 | 7,800 | 36532397 |
| 379849 | Oct 10, 1990 | Oct 10, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Walton,w. W. #5 | 10,000 | 35532832 |
| 377127 | Sep 28, 1990 | Sep 28, 1990 | Pennzoil Exploration & Prod. Co. | Harris | Pizzitola Unit #2 | 7,145 | 20131010 |
| 378238 | Sep 20, 1990 | Sep 20, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #49 | 10,200 | 50532721 |
| 377340 | Aug 31, 1990 | Aug 31, 1990 | Pennzoil Exploration & Prod. Co. | Sutton | Vanderstucken "A" #7 | 4,700 | 43533669 |
| 377243 | Aug 28, 1990 | Aug 28, 1990 | Pennzoil Exploration & Prod. Co. | Refugio | Lambert, M. F. -A- #12 | 8,500 | 39132027 |
| 376937 | Aug 22, 1990 | Aug 22, 1990 | Pennzoil Exploration & Prod. Co. | Sutton | Vanderstucken "A" #6 | 4,700 | 43533668 |
| 376936 | Aug 22, 1990 | Aug 22, 1990 | Pennzoil Exploration & Prod. Co. | Sutton | Vanderstucken "A" #5 | 4,700 | 43533667 |
| 375564 | Aug 14, 1990 | Aug 14, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 49 | 7,800 | 36532372 |
| 376560 | Aug 13, 1990 | Aug 13, 1990 | Pennzoil Exploration & Prod. Co. | Refugio | Lambert, M. F. -A- #13 | 8,500 | 39132026 |
| 375618 | Aug 13, 1990 | Aug 13, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hall Unit #5 | 7,800 | 36532375 |
| 375618Amendment | Aug 13, 1990 | Aug 13, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hall Unit #5 | 6,850 | 36532375 |
| 375436 | Aug 10, 1990 | Aug 10, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Morgan Unit #7 | 7,800 | 36532371 |
| 375294 | Aug 10, 1990 | Aug 10, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Moore Unit #6 | 7,800 | 36532370 |
| 375617 | Aug 6, 1990 | Aug 6, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Corrie Steele a Unit #A 4 | 9,800 | 36532356 |
| 375168 | Aug 2, 1990 | Aug 2, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 51 | 7,800 | 36532367 |
| 375167 | Aug 2, 1990 | Aug 2, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 50 | 7,800 | 36532368 |
| 376168 | Aug 1, 1990 | Aug 1, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Scarborough Gas Unit #2 | 13,000 | 35532827 |
| 375169 | Jul 11, 1990 | Jul 11, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 52 | 7,800 | 36532366 |
| 374002 | Jul 9, 1990 | Jul 9, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Crenshaw Unit #3 | 9,800 | 36532354 |
| 374913 | Jun 29, 1990 | Jun 29, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Collins Unit #6 | 7,800 | 36532364 |
| 373999 | Jun 25, 1990 | Jun 25, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Cavin Unit #5 | 9,800 | 36532355 |
| 374826 | Jun 22, 1990 | Jun 22, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Blucher, Von #4 | 12,500 | 35532821 |
| 374002Amendment | Jun 20, 1990 | Jun 20, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Crenshaw Unit #3 | 9,800 | 36532354 |
| 374309 | Jun 18, 1990 | Jun 18, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Wallace, W. H. #4D | 7,262 | 35530786 |
| 374308 | Jun 18, 1990 | Jun 18, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Brown, Minnie #5 | 7,312 | 35531376 |
| 374519 | Jun 14, 1990 | Jun 14, 1990 | Pennzoil Exploration & Prod. Co. | Bee | N.P.U.-Ray #12 | 10,500 | 02532581 |
| 374468 | Jun 13, 1990 | Jun 13, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Trevino, Albert #B 3 | 13,500 | 50532691 |
| 374229 | Jun 12, 1990 | Jun 12, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Sponberg, J. O. #6U | 7,112 | 35530790 |
| 374000 | Jun 5, 1990 | Jun 5, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Corrie Steele a Unit #A 4 | 9,800 | 36532356 |
| 374000Amendment | Jun 5, 1990 | Jun 5, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Corrie Steele a Unit #A 4 | 9,800 | 36532356 |
| 373752 | May 23, 1990 | May 23, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Rivers, M. L. #A 17 | 10,000 | 35532816 |
| 373752Amendment | May 23, 1990 | May 23, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Rivers, M. L. #A 17 | 10,000 | 35532816 |
| 373614 | May 23, 1990 | May 23, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Bruni Estate Gas Unit #C 1 | 8,750 | 50530114 |
| 373426 | May 15, 1990 | May 15, 1990 | Pennzoil Exploration & Prod. Co. | Goliad | N.P.U.-O. J. Mudd #2 | 9,700 | 17532511 |
| 372990 | May 4, 1990 | May 4, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Jeter, Aaron #1 | 9,900 | 36532338 |
| 372990Amendment | May 4, 1990 | May 4, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Aaron Jeter No. 1 Unit #1 | 9,900 | 36532338 |
| 372433 | Apr 23, 1990 | Apr 23, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Tiller-Crenshaw Unit #3 | 9,800 | 36532331 |
| 372004 | Apr 23, 1990 | Apr 23, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Tillery Unit #2 | 9,100 | 36530196 |
| 372313 | Apr 20, 1990 | Apr 20, 1990 | Pennzoil Exploration & Prod. Co. | Victoria | Urban, Armour et Al #1 | 6,200 | 46932038 |
| 372312 | Apr 20, 1990 | Apr 20, 1990 | Pennzoil Exploration & Prod. Co. | Victoria | Urban, Armour et Al #4 | 6,197 | 46932147 |
| 372311 | Apr 20, 1990 | Apr 20, 1990 | Pennzoil Exploration & Prod. Co. | Victoria | Urban, Armour et Al #3 | 5,950 | 46932144 |
| 372282 | Apr 18, 1990 | Apr 18, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Trosper Unit #2 | 9,800 | 36532325 |
| 370882 | Apr 9, 1990 | Apr 9, 1990 | Pennzoil Exploration & Prod. Co. | Harrison | Bryson "a" Unit #2 | 9,500 | 20330094 |
| 371738 | Apr 2, 1990 | Apr 2, 1990 | Pennzoil Exploration & Prod. Co. | Harrison | Bryson "a" Unit #4 | 9,500 | 20331911 |
| 371614 | Mar 29, 1990 | Mar 29, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Abel Vela-State Gas Unit #A 3 | 9,000 | 50532664 |
| 371222 | Mar 28, 1990 | Mar 28, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Tillery Unit #4 | 9,800 | 36532307 |
| 371377 | Mar 27, 1990 | Mar 27, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Werner, Louis Saw Mill Co. #17A | 9,800 | 36532309 |
| 371377Amendment | Mar 27, 1990 | Mar 27, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Werner, Louis Saw Mill Co. #17A | 9,800 | 36532309 |
| 371030 | Mar 22, 1990 | Mar 22, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Jernigan "a" Unit #A 3 | 9,800 | 36532303 |
| 371073 | Mar 16, 1990 | Mar 16, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #59 | 14,000 | 50532657 |
| 371073Amendment | Mar 16, 1990 | Mar 16, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #59 | 14,000 | 50532657 |
| 370776 | Mar 15, 1990 | Mar 15, 1990 | Pennzoil Exploration & Prod. Co. | Harris | Mendel-Allen Unit-Mendel #2 | 7,794 | 20131214 |
| 370865 | Mar 14, 1990 | Mar 14, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Roberson Unit #4 | 9,800 | 36532300 |
| 370739 | Mar 12, 1990 | Mar 12, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Brumble Unit #4 | 9,800 | 36532295 |
| 370269 | Mar 6, 1990 | Mar 6, 1990 | Pennzoil Exploration & Prod. Co. | Panola | L. Werner Sawmill Co. D Unit #1 | 9,800 | 36532290 |
| 370393 | Feb 28, 1990 | Feb 28, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Lewis Unit #6 | 9,800 | 36532292 |
| 370393Amendment | Feb 28, 1990 | Feb 28, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Lewis Unit #6 | 9,800 | 36532292 |
| 369205 | Feb 26, 1990 | Feb 26, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Wallace Unit #2 | 9,800 | 36532279 |
| 369713 | Feb 12, 1990 | Feb 12, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Catarino, Gracia et Al #2 | 13,500 | 50532644 |
| 369576 | Feb 9, 1990 | Feb 9, 1990 | Pennzoil Exploration & Prod. Co. | Brazoria | McFarland, Robert et Al #5 | 8,900 | 03931157 |
| 369575 | Feb 9, 1990 | Feb 9, 1990 | Pennzoil Exploration & Prod. Co. | Brazoria | McFarland, Robert et Al #4 | 8,930 | 03930827 |
| 368583 | Feb 9, 1990 | Feb 9, 1990 | Pennzoil Exploration & Prod. Co. | Nueces | Pyle, H. C. #7F | 6,290 | 35530703 |
| 369009 | Jan 23, 1990 | Jan 23, 1990 | Pennzoil Exploration & Prod. Co. | Zapata | Garza, Lauro #B 4 | 12,000 | 50532637 |
| 367992 | Jan 4, 1990 | Jan 4, 1990 | Pennzoil Exploration & Prod. Co. | Panola | Wallace Unit #4 | 9,800 | 36532262 |
| 367932 | Dec 27, 1989 | Dec 27, 1989 | Pennzoil Exploration & Prod. Co. | Panola | Owens Unit #5 | 9,800 | 36532260 |
| 367931 | Dec 27, 1989 | Dec 27, 1989 | Pennzoil Exploration & Prod. Co. | Panola | Owens Unit #6 | 9,800 | 36532261 |
| 365208 | Dec 11, 1989 | Dec 11, 1989 | Pennzoil Exploration & Prod. Co. | Cherokee | South #2 | 9,800 | 07330771 |