| 1801 | OTRA BACA | Johnson County, TX | Gas Property | Nov 2025 |
| 1802 | OTT 'B' | Barber County, KS | Oil & Gas Property | Jul 2010 |
| 1803 | OTT 1 | Carroll County, OH | Oil & Gas Property | Sep 2025 |
| 1804 | OTT 1 | Warren County, PA | Gas Property | Dec 2024 |
| 1805 | OTT 1 | Barber County, KS | Oil & Gas Property | Sep 2025 |
| 1806 | OTT 2 | Warren County, PA | Gas Property | Dec 2024 |
| 1807 | OTT 24 | Blaine County, OK | Oil & Gas Property | Sep 2020 |
| 1808 | OTT C.E. ET AL | Galveston County, TX | Oil & Gas Property | Feb 2015 |
| 1809 | OTT ERIC OTT | Harrison County, OH | Gas Property | Dec 2016 |
| 1810 | OTT USA 44-7TFH | Dunn County, ND | Oil & Gas Property | Dec 2025 |
| 1811 | OTTAWA AOW FEDERAL | Eddy County, NM | Oil & Gas Property | Dec 2019 |
| 1812 | OTTAWA FEDERAL COM | Chaves County, NM | Oil & Gas Property | Dec 2025 |
| 1813 | OTTE | McPherson County, KS | Oil Property | Aug 2025 |
| 1814 | OTTE | Carroll County, OH | Oil & Gas Property | Dec 2021 |
| 1815 | OTTEN | Bradford County, PA | Gas Property | Dec 2025 |
| 1816 | OTTEN | Wyoming County, PA | Gas Property | Dec 2025 |
| 1817 | OTTENHOFF | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 1818 | OTTER 1-11H | Burke County, ND | Oil & Gas Property | Dec 2025 |
| 1819 | OTTER 139-138 UNIT | Reeves County, TX | Oil & Gas Property | Oct 2025 |
| 1820 | OTTER 151-94-33D-28H | McKenzie County, ND | Oil & Gas Property | Dec 2025 |
| 1821 | OTTER 16-16N-12W | Blaine County, OK | Oil & Gas Property | Nov 2025 |
| 1822 | OTTER 2212 | Major County, OK | Oil & Gas Property | Nov 2025 |
| 1823 | OTTER UNIT | Milam County, TX | Oil & Gas Property | Nov 2025 |
| 1824 | OTTER WELL SVC | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 1825 | OTTER WOMAN 3 | Dunn County, ND | Oil & Gas Property | Dec 2025 |
| 1826 | OTTERHOUND | Garfield County, OK | Oil & Gas Property | Nov 2025 |
| 1827 | OTTERHOUND HCX | Burleson County, TX | Oil & Gas Property | Oct 2025 |
| 1828 | OTTERNESS 34-31 | Bowman County, ND | Oil & Gas Property | Dec 2025 |
| 1829 | OTTESEN | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 1830 | OTTESEN | Weld County, CO | Oil & Gas Property | Aug 2018 |
| 1831 | OTTIS 20 | Kingfisher County, OK | Oil & Gas Property | Oct 2025 |
| 1832 | OTTIS LEWIS 2 | De Soto Parish, LA | Gas Property | Dec 2024 |
| 1833 | OTTLEY | Gove County, KS | Oil Property | May 2023 |
| 1834 | OTTLEY | Thomas County, KS | Oil Property | Apr 2025 |
| 1835 | OTTLEY | Gove County, KS | Oil Property | Sep 2025 |
| 1836 | OTTLEY | Logan County, KS | Oil Property | Sep 2025 |
| 1837 | OTTLEY | Thomas County, KS | Oil Property | Sep 2025 |
| 1838 | OTTLEY | Gove County, KS | Oil Property | Sep 2025 |
| 1839 | OTTMAN | Rosebud County, MT | Oil Property | Oct 2023 |
| 1840 | OTTO | Yuma County, CO | Gas Property | Nov 2025 |
| 1841 | OTTO | Cooke County, TX | Oil & Gas Property | Nov 2025 |
| 1842 | OTTO | Grayson County, TX | Oil & Gas Property | Nov 2025 |
| 1843 | OTTO | Gonzales County, TX | Oil & Gas Property | Nov 2025 |
| 1844 | OTTO | Converse County, WY | Oil & Gas Property | Dec 2025 |
| 1845 | OTTO | Kay County, OK | Oil & Gas Property | Dec 2025 |
| 1846 | OTTO | Thomas County, KS | Oil Property | Aug 2025 |
| 1847 | OTTO | Kay County, OK | Oil Property | Nov 2025 |
| 1848 | OTTO | Cooke County, TX | Oil & Gas Property | Nov 2025 |
| 1849 | OTTO 14-23H | Dunn County, ND | Oil & Gas Property | Dec 2025 |
| 1850 | OTTO 1H | Webb County, TX | Oil & Gas Property | Nov 2025 |
| 1851 | OTTO 31 | Canadian County, OK | Oil & Gas Property | Nov 2025 |
| 1852 | OTTO B ( | Woodson County, KS | Oil Property | Sep 2025 |
| 1853 | OTTO BARBY | Beaver County, OK | Oil & Gas Property | Oct 2023 |
| 1854 | OTTO BARBY | Beaver County, OK | Oil & Gas Property | Nov 2025 |
| 1855 | OTTO BARBY | Beaver County, OK | Oil & Gas Property | Nov 2025 |
| 1856 | OTTO BARBY | Beaver County, OK | Oil & Gas Property | Oct 2025 |
| 1857 | OTTO BARBY | Beaver County, OK | Oil & Gas Property | Jul 2025 |
| 1858 | OTTO CHEM | Elk County, PA | Gas Property | Dec 2025 |
| 1859 | OTTO GART | Seward County, KS | Gas Property | Apr 2025 |
| 1860 | OTTO GAS UNIT NO. 1 | Kleberg County, TX | Oil & Gas Property | Dec 2023 |
| 1861 | OTTO HOEME | Texas County, OK | Gas Property | Nov 2025 |
| 1862 | OTTO MAX | Atascosa County, TX | Oil & Gas Property | Oct 2015 |
| 1863 | OTTO ROBERTS | Woodward County, OK | Oil & Gas Property | Nov 2025 |
| 1864 | OTTO SEEL 4-1 | Williams County, ND | Oil & Gas Property | Dec 2025 |
| 1865 | OTTO TURNER 2 | De Soto Parish, LA | Oil & Gas Property | Dec 2024 |
| 1866 | OTTO UNIT | Gonzales County, TX | Oil & Gas Property | Nov 2025 |
| 1867 | OTTO UNIT 1H | McMullen County, TX | Gas Property | Nov 2025 |
| 1868 | OTTO WAECHTER | Kearny County, KS | Gas Property | Sep 2025 |
| 1869 | OTTO-WHIPPLE | McMullen County, TX | Oil & Gas Property | Nov 2025 |
| 1870 | OTTOSON | Weld County, CO | Oil & Gas Property | Apr 2016 |
| 1871 | OTTUSO 1-5H | Pittsburg County, OK | Gas Property | Nov 2025 |
| 1872 | OTWAY | Midland County, MI | Oil Property | Jan 2026 |
| 1873 | OU GB | Uintah County, UT | Oil & Gas Property | Dec 2025 |
| 1874 | OU SG | Uintah County, UT | Oil & Gas Property | Dec 2025 |
| 1875 | OU WIH | Uintah County, UT | Oil & Gas Property | Dec 2025 |
| 1876 | OUDERKIRK | Rooks County, KS | Oil Property | Sep 2025 |
| 1877 | OUDERKIRK | Rooks County, KS | Oil Property | Oct 1989 |
| 1878 | OUGHTON | Kern County, CA | Oil & Gas Property | Dec 2025 |
| 1879 | OUIDA WILSON 45 | Roberts County, TX | Oil & Gas Property | Nov 2025 |
| 1880 | OUIMET STATE COM | Eddy County, NM | Oil & Gas Property | Dec 2025 |
| 1881 | OUKROP | Dunn County, ND | Oil & Gas Property | Dec 2025 |
| 1882 | OUR DIANE | Weld County, CO | Oil & Gas Property | Nov 2025 |
| 1883 | OUR LAND | Harrison County, OH | Oil & Gas Property | Sep 2025 |
| 1884 | OURAY | Uintah County, UT | Oil & Gas Property | Dec 2025 |
| 1885 | OURAY | Uintah County, UT | Oil & Gas Property | Dec 2025 |
| 1886 | OURAY 5-64 15-16-1BHZ | Arapahoe County, CO | Oil & Gas Property | Dec 2025 |
| 1887 | OURAY FEDERAL COM | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1888 | OURAY STATE | Reeves County, TX | Oil & Gas Property | Nov 2025 |
| 1889 | OURAY UT 4-13 4-3-13-36-7HX | Duchesne County, UT | Oil & Gas Property | Dec 2025 |
| 1890 | OURAY VALLEY | Uintah County, UT | Oil & Gas Property | Dec 2025 |
| 1891 | OURAY VLY | Uintah County, UT | Oil & Gas Property | Dec 2025 |
| 1892 | OURSLER | Butler County, KS | Oil Property | Jul 2025 |
| 1893 | OUTER BLACKS FORK | Uinta County, WY | Oil & Gas Property | Dec 2025 |
| 1894 | OUTHIER | Blaine County, OK | Oil & Gas Property | Nov 2025 |
| 1895 | OUTHIER | Blaine County, OK | Oil & Gas Property | Oct 2025 |
| 1896 | OUTLAND 1 | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1897 | OUTLAND 14 23 STATE COM 2BS | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1898 | OUTLAND STATE UNIT | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1899 | OUTLAND WCA STATE UNIT 11 2 | Lea County, NM | Oil & Gas Property | Dec 2025 |
| 1900 | OUTLAW | Guernsey County, OH | Oil & Gas Property | Sep 2025 |