| 1301 | ORANGE UNIT | Atascosa County, TX | Oil & Gas Property | May 2025 |
| 1302 | ORANGE-GRAZIDE | Orange County, CA | Oil & Gas Property | Dec 1999 |
| 1303 | ORANGE-ROWLAND | Orange County, CA | Oil & Gas Property | Jul 2002 |
| 1304 | ORANGEVILLE | Emery County, UT | Gas Property | Jul 2024 |
| 1305 | ORANSKY M.B. ET AL | Freestone County, TX | Oil & Gas Property | Aug 2024 |
| 1306 | ORAVEC | Geauga County, OH | Oil & Gas Property | Dec 2024 |
| 1307 | ORBISON | Pittsburg County, OK | Oil & Gas Property | May 2025 |
| 1308 | ORBISON 28 | Reeves County, TX | Oil & Gas Property | May 2025 |
| 1309 | ORBISON BO | Lea County, NM | Oil & Gas Property | Jun 2025 |
| 1310 | ORBIT | Seminole County, OK | Oil & Gas Property | Jun 2025 |
| 1311 | ORBIT | Johnson County, WY | Oil & Gas Property | Jun 2025 |
| 1312 | ORBIT 1606 | Kingfisher County, OK | Oil & Gas Property | May 2025 |
| 1313 | ORBIT 24-13-12 | Williams County, ND | Oil & Gas Property | Jun 2025 |
| 1314 | ORBIT 51-7-21-16 | Reeves County, TX | Oil & Gas Property | May 2025 |
| 1315 | ORBWEAVER 149-92-32C-29H | Dunn County, ND | Oil & Gas Property | Jun 2025 |
| 1316 | ORC 21179 | Belmont County, OH | Gas Property | Mar 2025 |
| 1317 | ORC 211792 2A | Belmont County, OH | Gas Property | Mar 2025 |
| 1318 | ORCA 11 FEDERAL COM | Eddy County, NM | Oil & Gas Property | May 2025 |
| 1319 | ORCA FEDERAL | Mountrail County, ND | Oil & Gas Property | Jun 2025 |
| 1320 | ORCA UNIT | Brazos County, TX | Oil & Gas Property | May 2025 |
| 1321 | ORCA UNIT NO | Brazos County, TX | Oil & Gas Property | May 2025 |
| 1322 | ORCAS STATE 5601 13-16 | Williams County, ND | Oil & Gas Property | Jun 2025 |
| 1323 | ORCHARD | Park County, WY | Oil & Gas Property | Jun 2025 |
| 1324 | ORCHARD | Kern County, CA | Oil & Gas Property | May 1988 |
| 1325 | ORCHARD | Mesa County, CO | Oil & Gas Property | Jun 2025 |
| 1326 | ORCHARD | Hot Springs County, WY | Oil & Gas Property | Jun 2025 |
| 1327 | ORCHARD 40 | Glasscock County, TX | Oil & Gas Property | May 2025 |
| 1328 | ORCHARD CS | Campbell County, WY | Gas Property | Dec 2015 |
| 1329 | ORCHARD L. B | Archer County, TX | Oil & Gas Property | Jan 2025 |
| 1330 | ORCHARD SB | Kern County, CA | Oil & Gas Property | May 2025 |
| 1331 | ORCHARD UNIT | Mesa County, CO | Oil & Gas Property | Jun 2025 |
| 1332 | ORCHID 1-13 | Campbell County, WY | Oil Property | Jun 2025 |
| 1333 | ORCUTT | Santa Barbara County, CA | Oil & Gas Property | Jul 2004 |
| 1334 | ORCUTT | Creek County, OK | Oil Property | Apr 2025 |
| 1335 | ORCUTT | Ventura County, CA | Oil & Gas Property | May 2025 |
| 1336 | ORCUTT | Chautauqua County, NY | Gas Property | Dec 2024 |
| 1337 | ORD NAN D | Young County, TX | Oil & Gas Property | May 2025 |
| 1338 | ORD, MAUDIE | Monongalia County, WV | Gas Property | Dec 2013 |
| 1339 | ORDEAN FEDERAL 5300 24-25T | Williams County, ND | Oil & Gas Property | Jun 2025 |
| 1340 | ORDUNO | Los Angeles County, CA | Oil & Gas Property | May 2025 |
| 1341 | ORDWAY | Rooks County, KS | Oil Property | Apr 2025 |
| 1342 | ORDWAY 1-26H | McKenzie County, ND | Oil & Gas Property | Jun 2025 |
| 1343 | ORE IDA 14 FEDERAL | Eddy County, NM | Oil & Gas Property | Jun 2025 |
| 1344 | OREAR, DANNY E | Doddridge County, WV | Oil & Gas Property | Dec 2021 |
| 1345 | OREDIGGER | Howard County, TX | Oil & Gas Property | May 2025 |
| 1346 | OREILLY WA | Ector County, TX | Oil & Gas Property | May 2025 |
| 1347 | OREL HERSHISER 32-41 | Midland County, TX | Oil & Gas Property | May 2025 |
| 1348 | OREL HERSHISER 41-32 | Midland County, TX | Oil & Gas Property | May 2025 |
| 1349 | ORELIA RANCH | Frio County, TX | Oil & Gas Property | May 2025 |
| 1350 | ORELLA | Santa Barbara County, CA | Oil & Gas Property | Jan 1989 |
| 1351 | ORELLANA | Irion County, TX | Oil & Gas Property | May 2025 |
| 1352 | OREM | Moore County, TX | Gas Property | May 2025 |
| 1353 | OREN | Beckham County, OK | Oil & Gas Property | May 2025 |
| 1354 | OREN USA 31-6TFH | Mountrail County, ND | Oil & Gas Property | Jun 2025 |
| 1355 | ORENCHUK RUSSELL 11890 | Washington County, PA | Gas Property | Jun 2025 |
| 1356 | ORENDORFF-FRAZIER | Muskogee County, OK | Oil & Gas Property | Apr 2007 |
| 1357 | OREO | McIntosh County, OK | Gas Property | Dec 2024 |
| 1358 | OREO FEDERAL 5300 24-25T | Williams County, ND | Oil & Gas Property | Jun 2025 |
| 1359 | ORF 1 | Caddo County, OK | Oil & Gas Property | May 2025 |
| 1360 | ORGAIN | Liberty County, TX | Oil & Gas Property | Feb 2025 |
| 1361 | ORGAIN | Roger Mills County, OK | Oil & Gas Property | May 2025 |
| 1362 | ORGAIN B. D | Hardin County, TX | Oil & Gas Property | Dec 2024 |
| 1363 | ORGAIN HEIRS | Bastrop County, TX | Oil & Gas Property | May 2025 |
| 1364 | ORGANIC | Midland County, TX | Oil & Gas Property | May 2025 |
| 1365 | ORIE LOVE | Sumner County, KS | Oil Property | Sep 2024 |
| 1366 | ORIENT | Kern County, CA | Oil & Gas Property | May 2025 |
| 1367 | ORIENT 1-12 | Howard County, TX | Oil & Gas Property | May 2025 |
| 1368 | ORIGAMI | Kern County, CA | Oil & Gas Property | May 2025 |
| 1369 | ORIN | Stephens County, OK | Oil & Gas Property | May 2025 |
| 1370 | ORIN FORTENBERRY GAS UNIT | Wise County, TX | Oil & Gas Property | Mar 2025 |
| 1371 | ORIN LEE NEAL | Jefferson County, PA | Gas Property | Dec 2024 |
| 1372 | ORINGDERFF | Ochiltree County, TX | Oil & Gas Property | May 2025 |
| 1373 | ORINGDERFF EATON | Ochiltree County, TX | Oil & Gas Property | May 2025 |
| 1374 | ORION | Tulsa County, OK | Oil Property | Apr 2025 |
| 1375 | ORION | Atascosa County, TX | Oil & Gas Property | May 2025 |
| 1376 | ORION | Loving County, TX | Oil & Gas Property | May 2025 |
| 1377 | ORION | Converse County, WY | Oil & Gas Property | Jun 2025 |
| 1378 | ORION | Uintah County, UT | Oil & Gas Property | Jun 2025 |
| 1379 | ORION 1H | Frio County, TX | Oil & Gas Property | May 2025 |
| 1380 | ORION FEDERAL 5792 42-20H | Mountrail County, ND | Oil & Gas Property | Jun 2025 |
| 1381 | ORION UNIT | Shelby County, TX | Gas Property | May 2025 |
| 1382 | ORIS | Mercer County, PA | Oil & Gas Property | Dec 2024 |
| 1383 | ORIS M. SCHRECENGOST | Armstrong County, PA | Oil & Gas Property | Dec 2024 |
| 1384 | ORIVA | Campbell County, WY | Gas Property | Dec 2011 |
| 1385 | ORIVA FEDERAL | Campbell County, WY | Gas Property | Jun 2025 |
| 1386 | ORIVE A | Starr County, TX | Oil & Gas Property | May 2025 |
| 1387 | ORLA | Reeves County, TX | Oil & Gas Property | Mar 2021 |
| 1388 | ORLA 1 | Ingham County, MI | Oil & Gas Property | Apr 2025 |
| 1389 | ORLAND UNIT | Glenn County, CA | Gas Property | Apr 1986 |
| 1390 | ORLANDI, INC. ( | Kanawha County, WV | Gas Property | Dec 2021 |
| 1391 | ORLANDI, JO | Nicholas County, WV | Oil & Gas Property | Dec 2021 |
| 1392 | ORLANDI, JOSEPH | Kanawha County, WV | Oil & Gas Property | Dec 2021 |
| 1393 | ORLANDI, JOSEPH TRUSTEE | Nicholas County, WV | Oil & Gas Property | Dec 2021 |
| 1394 | ORLANDO HARMAN | Armstrong County, PA | Gas Property | Dec 2024 |
| 1395 | ORLEANS LEVEE | Plaquemines Parish, LA | Oil & Gas Property | Jul 2011 |
| 1396 | ORLOFF | Kern County, CA | Oil & Gas Property | Jun 2025 |
| 1397 | ORLOFF | Kern County, CA | Oil Property | Jul 1993 |
| 1398 | ORLOSKY | Mercer County, PA | Gas Property | Dec 2024 |
| 1399 | ORLYNNE 2-3H | Divide County, ND | Oil & Gas Property | Jun 2025 |
| 1400 | ORME CHARLSIE | Palo Pinto County, TX | Oil & Gas Property | May 2025 |