| 501 | OTTO 1H | Webb County, TX | Oil & Gas Property | Jan 2024 |
| 502 | OTTO GAS UNIT NO. 1 | Kleberg County, TX | Oil & Gas Property | Sep 2023 |
| 503 | OTTO MAX | Atascosa County, TX | Oil & Gas Property | Oct 2015 |
| 504 | OTTO UNIT | Gonzales County, TX | Oil & Gas Property | Jan 2024 |
| 505 | OTTO UNIT 1H | McMullen County, TX | Gas Property | Jan 2024 |
| 506 | OTTO-WHIPPLE | McMullen County, TX | Oil & Gas Property | Dec 2023 |
| 507 | OUIDA WILSON 45 | Roberts County, TX | Oil & Gas Property | Jan 2024 |
| 508 | OURAY STATE | Reeves County, TX | Oil & Gas Property | Jan 2024 |
| 509 | OUTTERSIDE A. J | Galveston County, TX | Oil & Gas Property | Dec 2023 |
| 510 | OVERALL | Coleman County, TX | Oil & Gas Property | Dec 2023 |
| 511 | OVERBEY | Wichita County, TX | Oil & Gas Property | Jan 2024 |
| 512 | OVERBY | Wichita County, TX | Oil & Gas Property | Jan 2024 |
| 513 | OVERBY C. J | Karnes County, TX | Oil & Gas Property | Apr 2015 |
| 514 | OVERBY GAS UNIT 2E | Bee County, TX | Oil & Gas Property | Jan 2024 |
| 515 | OVERCASH | Throckmorton County, TX | Oil & Gas Property | Dec 2023 |
| 516 | OVERSHOWN GAS UNIT | Houston County, TX | Oil & Gas Property | Jan 2024 |
| 517 | OVERSTREET | Cooke County, TX | Oil Property | Jan 2024 |
| 518 | OVERTON | Smith County, TX | Oil & Gas Property | Jan 2024 |
| 519 | OVERTON | Glasscock County, TX | Oil & Gas Property | Jan 2024 |
| 520 | OVERTON BEN | Brown County, TX | Oil & Gas Property | Jan 2024 |
| 521 | OVERTON E. (WOODBINE) UNIT | Rusk County, TX | Oil & Gas Property | Jan 2024 |
| 522 | OVERTON G | Rusk County, TX | Oil & Gas Property | Jan 2024 |
| 523 | OVERTON NE (PETTIT -A-) UNIT | Rusk County, TX | Oil & Gas Property | Jan 2024 |
| 524 | OVERTON UNIT | Dawson County, TX | Oil & Gas Property | Jan 2024 |
| 525 | OWEN | Moore County, TX | Oil & Gas Property | Jan 2024 |
| 526 | OWEN | Jack County, TX | Oil & Gas Property | Aug 2023 |
| 527 | OWEN | Johnson County, TX | Oil & Gas Property | Jan 2024 |
| 528 | OWEN | Burleson County, TX | Oil & Gas Property | Jan 2024 |
| 529 | OWEN | Webb County, TX | Oil & Gas Property | Jan 2024 |
| 530 | OWEN | Jack County, TX | Oil & Gas Property | Dec 2023 |
| 531 | OWEN | Ector County, TX | Oil & Gas Property | Jan 2024 |
| 532 | OWEN | Jack County, TX | Oil & Gas Property | Jan 2024 |
| 533 | OWEN | Young County, TX | Oil & Gas Property | Jan 2024 |
| 534 | OWEN | Webb County, TX | Oil & Gas Property | Jan 2024 |
| 535 | OWEN F | Burleson County, TX | Oil & Gas Property | May 2022 |
| 536 | OWEN J | Ellis County, TX | Oil & Gas Property | Jan 2024 |
| 537 | OWEN J.D. GAS UNIT | Bowie County, TX | Oil & Gas Property | Feb 2018 |
| 538 | OWEN RHB 1H | Harrison County, TX | Gas Property | Jan 2024 |
| 539 | OWEN-BERRY | Cooke County, TX | Oil Property | Jan 2024 |
| 540 | OWEN-BRISCOE | Webb County, TX | Oil & Gas Property | Jan 2024 |
| 541 | OWEN-BRISCOE STATE-WCSL GU B 2H | Webb County, TX | Gas Property | Jan 2024 |
| 542 | OWEN-CHALK | Howard County, TX | Oil & Gas Property | Jan 2024 |
| 543 | OWEN-STATE 1 | Webb County, TX | Oil & Gas Property | Jan 2024 |
| 544 | OWENS | Jack County, TX | Oil & Gas Property | Sep 2021 |
| 545 | OWENS | Colorado County, TX | Oil & Gas Property | Jan 2024 |
| 546 | OWENS | Cass County, TX | Oil & Gas Property | Jan 2024 |
| 547 | OWENS | Johnson County, TX | Oil & Gas Property | Dec 2023 |
| 548 | OWENS | Lee County, TX | Oil & Gas Property | Jan 2024 |
| 549 | OWENS | Crockett County, TX | Oil & Gas Property | Jan 2024 |
| 550 | OWENS | Upton County, TX | Oil & Gas Property | Jan 2024 |
| 551 | OWENS | Panola County, TX | Oil & Gas Property | Jan 2024 |
| 552 | OWENS | Wise County, TX | Oil & Gas Property | Jan 2024 |
| 553 | OWENS | Webb County, TX | Oil & Gas Property | Jan 2024 |
| 554 | OWENS | Ochiltree County, TX | Oil & Gas Property | Jan 2024 |
| 555 | OWENS | Upton County, TX | Oil & Gas Property | Jan 2024 |
| 556 | OWENS | Panola County, TX | Oil & Gas Property | Jan 2024 |
| 557 | OWENS | Reagan County, TX | Oil & Gas Property | Jan 2024 |
| 558 | OWENS | Wilbarger County, TX | Oil & Gas Property | Dec 2023 |
| 559 | OWENS | Shackelford County, TX | Oil & Gas Property | Jan 2024 |
| 560 | OWENS & SNOOT | Crane County, TX | Oil Property | Jan 2020 |
| 561 | OWENS 1-75 LOV | Loving County, TX | Oil & Gas Property | Jan 2024 |
| 562 | OWENS C | Freestone County, TX | Oil & Gas Property | Jan 2024 |
| 563 | OWENS E. ARLEIGH | Webb County, TX | Oil & Gas Property | Jan 2024 |
| 564 | OWENS FELMONT | Upton County, TX | Oil & Gas Property | Jul 2022 |
| 565 | OWENS GAS UNIT | Freestone County, TX | Oil & Gas Property | Jan 2024 |
| 566 | OWENS M. J | Wichita County, TX | Oil & Gas Property | Jan 2024 |
| 567 | OWENS MACK | Jones County, TX | Oil & Gas Property | Feb 2016 |
| 568 | OWENS NELLIE | Panola County, TX | Oil & Gas Property | Jan 2024 |
| 569 | OWENS T.B. GAS UNIT | Harrison County, TX | Oil & Gas Property | Jan 2024 |
| 570 | OWENS UNIT | Denton County, TX | Oil & Gas Property | Jan 2024 |
| 571 | OWENS UNIT A | Karnes County, TX | Oil & Gas Property | Jan 2024 |
| 572 | OWENS-CRAVENS | Upton County, TX | Oil & Gas Property | Jan 2024 |
| 573 | OWL DRAW | Culberson County, TX | Oil & Gas Property | Jan 2024 |
| 574 | OWNBEY | Hutchinson County, TX | Oil & Gas Property | May 2023 |
| 575 | OWNBY SAN ANDRE | Yoakum County, TX | Oil & Gas Property | Jan 2024 |
| 576 | OWNBY/CLEARFORK, UPPER/ | Yoakum County, TX | Oil & Gas Property | Jan 2024 |
| 577 | OXER UNIT | Parker County, TX | Oil & Gas Property | Jan 2024 |
| 578 | OXFORD DAVIDSON-OXFORD PSA | Karnes County, TX | Oil & Gas Property | Jan 2024 |
| 579 | OXFORD UNIT | Karnes County, TX | Oil & Gas Property | Jan 2024 |
| 580 | OXFORD WITTE-CREEL MIXON SA | Karnes County, TX | Oil & Gas Property | Jan 2024 |
| 581 | OXFORD-WITTE UNIT | Karnes County, TX | Oil & Gas Property | Jan 2024 |
| 582 | OXLEY ET AL UNIT | Chambers County, TX | Oil & Gas Property | Jan 2024 |
| 583 | OXSHEER | Panola County, TX | Oil & Gas Property | Jan 2024 |
| 584 | OXSHEER-SP-WIENER E (SA) | Panola County, TX | Oil & Gas Property | Jan 2024 |
| 585 | OXTAIL 54-2-40 | Loving County, TX | Oil & Gas Property | Jan 2024 |
| 586 | OXY FEE 24 | Reeves County, TX | Oil & Gas Property | Jan 2023 |
| 587 | OXY PARKS | Midland County, TX | Oil & Gas Property | Jan 2024 |
| 588 | OXY-EMMONS | Brown County, TX | Oil & Gas Property | Dec 2023 |
| 589 | OYERVIDES UNIT | Wilson County, TX | Oil & Gas Property | Jan 2024 |
| 590 | OYSTER BAYOU FIELD UNIT | Chambers County, TX | Oil & Gas Property | Jan 2024 |
| 591 | OYSTERCATCHER | Brazos County, TX | Oil & Gas Property | Jan 2024 |
| 592 | OZARK | Fayette County, TX | Oil & Gas Property | Jan 2024 |
| 593 | OZIER | Dawson County, TX | Oil & Gas Property | Jan 2024 |
| 594 | OZONA DEVELOPMENT 7 | Crockett County, TX | Oil & Gas Property | Jan 2024 |
| 595 | OZONA GAS UNIT | Crockett County, TX | Oil & Gas Property | Jan 2024 |
| 596 | OZONA OIL UNIT | Crockett County, TX | Oil & Gas Property | Jan 2024 |
| 597 | OZZIE | Burleson County, TX | Oil & Gas Property | Jan 2024 |
| 598 | OZZY | Dewitt County, TX | Oil & Gas Property | Jan 2024 |