| 1501 | ORTEGA | Reagan County, TX | Oil & Gas Property | Nov 2025 |
| 1502 | ORTH | Ellis County, KS | Oil Property | Sep 2025 |
| 1503 | ORTH | Haskell County, KS | Gas Property | Sep 2025 |
| 1504 | ORTH | Rice County, KS | Oil Property | Sep 2025 |
| 1505 | ORTH | Haskell County, KS | Gas Property | Sep 2025 |
| 1506 | ORTH | Ellis County, KS | Oil Property | Sep 2025 |
| 1507 | ORTH | Rice County, KS | Oil Property | Sep 2022 |
| 1508 | ORTH B | Warren County, PA | Oil & Gas Property | Dec 2024 |
| 1509 | ORTH-GILLESPIE | Woodson County, KS | Oil Property | Mar 2025 |
| 1510 | ORTH-HADDON 1-5 | Rice County, KS | Oil Property | Sep 2025 |
| 1511 | ORTHA JONES 41 | Ochiltree County, TX | Oil & Gas Property | Nov 2025 |
| 1512 | ORTHODOX | Crawford County, PA | Oil & Gas Property | Dec 2025 |
| 1513 | ORTHODOX EDUCATIONAL SOCIETY OES | Taylor County, WV | Gas Property | Dec 2021 |
| 1514 | ORTHRUS UNIT | Borden County, TX | Oil & Gas Property | Nov 2025 |
| 1515 | ORTIZ | Wagoner County, OK | Oil & Gas Property | Feb 2008 |
| 1516 | ORTIZ RANCH | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 1517 | ORTMANN | Wilson County, TX | Oil & Gas Property | Nov 2025 |
| 1518 | ORTNER | Phillips County, CO | Gas Property | Sep 2023 |
| 1519 | ORTON | Washington County, PA | Oil & Gas Property | Oct 2025 |
| 1520 | ORTON | Clay County, TX | Oil & Gas Property | Nov 2025 |
| 1521 | ORTON | Erie County, PA | Gas Property | Dec 1986 |
| 1522 | ORTON A | Archer County, TX | Oil & Gas Property | Nov 2025 |
| 1523 | ORTON UNIT | Karnes County, TX | Oil & Gas Property | Nov 2025 |
| 1524 | ORTS H.P | Gonzales County, TX | Oil & Gas Property | Nov 2025 |
| 1525 | ORVAL 1 | Pittsburg County, OK | Gas Property | Nov 2025 |
| 1526 | ORVAL 44-23H | Dunn County, ND | Oil & Gas Property | Dec 2025 |
| 1527 | ORVAL BDQ STATE COM | Eddy County, NM | Oil & Gas Property | Mar 2022 |
| 1528 | ORVIE 24-20H | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1529 | ORVILLE | Kingfisher County, OK | Oil & Gas Property | Oct 2025 |
| 1530 | ORVILLE | Major County, OK | Oil & Gas Property | Nov 2025 |
| 1531 | ORVILLE | Indiana County, PA | Gas Property | Dec 2025 |
| 1532 | ORVILLE | Coal County, OK | Oil & Gas Property | Nov 2025 |
| 1533 | ORVILLE 29-32-162-98H 2XM | Divide County, ND | Oil & Gas Property | Dec 2025 |
| 1534 | ORVILLE 4-9 | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1535 | ORVILLE CONRAD | Roger Mills County, OK | Oil & Gas Property | Nov 2025 |
| 1536 | ORVILLE J MORAN | Licking County, OH | Oil Property | Dec 2024 |
| 1537 | ORVILLE JONES | Licking County, OH | Oil & Gas Property | Dec 2017 |
| 1538 | ORVILLE M WATSON | Indiana County, PA | Gas Property | Dec 2025 |
| 1539 | ORVILLE OSBORN | Muskingum County, OH | Oil & Gas Property | Dec 2022 |
| 1540 | ORVILLE RUSCO | Barton County, KS | Oil Property | May 1996 |
| 1541 | ORVILLE W. PRESCOTT | Clearfield County, PA | Gas Property | Dec 2025 |
| 1542 | ORVIN 31-13TFH | Mountrail County, ND | Oil & Gas Property | Dec 2025 |
| 1543 | ORVIS | Furnas County, NE | Oil Property | Dec 2024 |
| 1544 | ORVIS 150-99-21-16 | McKenzie County, ND | Oil & Gas Property | Dec 2025 |
| 1545 | ORVIS 37 | Martin County, TX | Oil & Gas Property | Nov 2025 |
| 1546 | ORVIS STATE 150-99-21-16 | McKenzie County, ND | Oil & Gas Property | Dec 2025 |
| 1547 | ORWICK | Clearfield County, PA | Gas Property | Dec 2025 |
| 1548 | ORWIG | Seminole County, OK | Oil Property | Jul 2022 |
| 1549 | ORWIG | Los Angeles County, CA | Oil & Gas Property | Dec 2025 |
| 1550 | ORYX | Atascosa County, TX | Oil & Gas Property | Nov 2025 |
| 1551 | ORYX 13 | Reeves County, TX | Oil & Gas Property | Nov 2025 |
| 1552 | ORYX 149-93-29B-32H-LL | Dunn County, ND | Oil & Gas Property | Dec 2025 |
| 1553 | ORYX 53-2-12 | Loving County, TX | Oil & Gas Property | Nov 2025 |
| 1554 | ORYX FEE | Hardin County, TX | Oil Property | Nov 2025 |
| 1555 | ORYX HUNTER | Lavaca County, TX | Oil & Gas Property | Nov 2025 |
| 1556 | ORYX ROAN STATE | Reeves County, TX | Oil & Gas Property | Nov 2025 |
| 1557 | ORYX-AKIN | Gregg County, TX | Oil & Gas Property | Nov 2025 |
| 1558 | ORYX-SUN FEE | Chambers County, TX | Oil & Gas Property | Aug 2024 |
| 1559 | OS 03 | Campbell County, WY | Gas Property | Mar 2010 |
| 1560 | OS 05 | Campbell County, WY | Gas Property | Jun 2015 |
| 1561 | OS 11 | Campbell County, WY | Gas Property | Jul 2015 |
| 1562 | OS 13 | Campbell County, WY | Gas Property | Jul 2015 |
| 1563 | OS 16 | Campbell County, WY | Gas Property | Jun 2014 |
| 1564 | OS BURNHAM | Crawford County, PA | Gas Property | Dec 2017 |
| 1565 | OS CROSSING U II 109-27 | Uintah County, UT | Oil & Gas Property | Jan 2026 |
| 1566 | OSA 0 | Los Angeles County, CA | Oil & Gas Property | Dec 2025 |
| 1567 | OSAGE | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1568 | OSAGE | Coffey County, KS | Oil & Gas Property | Mar 2024 |
| 1569 | OSAGE | Osage County, OK | Oil & Gas Property | Jul 2022 |
| 1570 | OSAGE | Osage County, OK | Oil Property | Aug 2018 |
| 1571 | OSAGE | Osage County, OK | Oil & Gas Property | Nov 2025 |
| 1572 | OSAGE | Barber County, KS | Oil & Gas Property | Sep 2025 |
| 1573 | OSAGE | Barber County, KS | Oil & Gas Property | Sep 2025 |
| 1574 | OSAGE 18 FE | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1575 | OSAGE 34 FEDERAL | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1576 | OSAGE 5693 43-35T | Mountrail County, ND | Oil & Gas Property | Dec 2025 |
| 1577 | OSAGE BOYD 15 | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1578 | OSAGE BRADLEY UNIT | Weston County, WY | Oil & Gas Property | Dec 2025 |
| 1579 | OSAGE FEDERAL | Eddy County, NM | Oil & Gas Property | Jun 2025 |
| 1580 | OSAGE JUNIPER UNIT | Weston County, WY | Oil & Gas Property | Jan 2026 |
| 1581 | OSAGE UNIT | La Salle County, TX | Oil & Gas Property | Nov 2025 |
| 1582 | OSAGE WEST UNIT | Weston County, WY | Oil & Gas Property | Aug 2025 |
| 1583 | OSAGE WHITTEN | Logan County, OK | Oil & Gas Property | Nov 2025 |
| 1584 | OSAGE/DAVIS | Osage County, OK | Oil Property | Nov 2025 |
| 1585 | OSAGE/DAVIS BR | Osage County, OK | Gas Property | Mar 2000 |
| 1586 | OSBERN | Creek County, OK | Gas Property | Jun 2006 |
| 1587 | OSBORN | Grady County, OK | Oil & Gas Property | Nov 2025 |
| 1588 | OSBORN | Grady County, OK | Oil & Gas Property | Nov 2025 |
| 1589 | OSBORN | Pawnee County, OK | Oil & Gas Property | Aug 2017 |
| 1590 | OSBORN | Tulsa County, OK | Oil Property | Nov 2025 |
| 1591 | OSBORN | Hughes County, OK | Oil & Gas Property | Dec 2016 |
| 1592 | OSBORN | Campbell County, WY | Gas Property | Jan 2008 |
| 1593 | OSBORN | Kern County, CA | Oil & Gas Property | Nov 2025 |
| 1594 | OSBORN | Freestone County, TX | Oil & Gas Property | Nov 2025 |
| 1595 | OSBORN | Pontotoc County, OK | Oil Property | Nov 2025 |
| 1596 | OSBORN | Pike County, KY | Gas Property | Dec 2023 |
| 1597 | OSBORN | Coshocton County, OH | Oil & Gas Property | Dec 2022 |
| 1598 | OSBORN | Noble County, OK | Gas Property | Jul 2024 |
| 1599 | OSBORN | Licking County, OH | Oil & Gas Property | Dec 2019 |
| 1600 | OSBORN | Hughes County, OK | Oil & Gas Property | Dec 2018 |