| 61001 | ISABELLA | Gonzales County, TX | Oil & Gas Property | Apr 2003 |
| 61002 | ISABELLA FEDERAL 6093 42-24H | Burke County, ND | Oil & Gas Property | Apr 2026 |
| 61003 | ISABELLA MAGNESS | Sabine Parish, LA | Oil Property | Dec 2024 |
| 61004 | ISABELLA POWELL | Meigs County, OH | Oil & Gas Property | Dec 2025 |
| 61005 | ISABELLA TTT 41-26HU | Mountrail County, ND | Oil & Gas Property | Apr 2026 |
| 61006 | ISABELLE | Finney County, KS | Oil Property | Feb 2026 |
| 61007 | ISABELLE | Karnes County, TX | Oil & Gas Property | Mar 2026 |
| 61008 | ISALY | Monroe County, OH | Oil & Gas Property | Mar 2026 |
| 61009 | ISBELL | Garfield County, OK | Oil & Gas Property | Feb 2026 |
| 61010 | ISBELL | Carter County, OK | Oil Property | Nov 2025 |
| 61011 | ISBELL | Bradford County, PA | Gas Property | Mar 2026 |
| 61012 | ISBELL | Johnson County, TX | Oil & Gas Property | Mar 2026 |
| 61013 | ISBELL 21 | Parker County, TX | Oil & Gas Property | Mar 2026 |
| 61014 | ISBELL HORIZONTAL UNIT | Midland County, TX | Oil & Gas Property | Mar 2026 |
| 61015 | ISBELL-FRY | Jones County, TX | Oil Property | Sep 2024 |
| 61016 | ISBILL | McClain County, OK | Oil & Gas Property | Mar 2026 |
| 61017 | ISCH | Roger Mills County, OK | Oil & Gas Property | Mar 2026 |
| 61018 | ISCO A | Los Angeles County, CA | Oil & Gas Property | Jan 1993 |
| 61019 | ISEMAN | Armstrong County, PA | Gas Property | Dec 2025 |
| 61020 | ISENBART | Woods County, OK | Oil & Gas Property | Feb 2026 |
| 61021 | ISENBERGER | Converse County, WY | Gas Property | Nov 2015 |
| 61022 | ISENHOUR | Sublette County, WY | Oil & Gas Property | Mar 2026 |
| 61023 | ISENHOWER | Callahan County, TX | Oil & Gas Property | Mar 2026 |
| 61024 | ISENHOWER W. EST | Eastland County, TX | Oil & Gas Property | Mar 2026 |
| 61025 | ISENSEE | Nueces County, TX | Oil & Gas Property | Mar 2026 |
| 61026 | ISERN | Ness County, KS | Oil Property | Feb 2026 |
| 61027 | ISERN | Barton County, KS | Oil & Gas Property | Feb 2026 |
| 61028 | ISERNHAGEN | Cheyenne County, KS | Gas Property | Feb 2026 |
| 61029 | ISG/DCE | Cuyahoga County, OH | Oil & Gas Property | Dec 2025 |
| 61030 | ISGAR A#4 | La Plata County, CO | Gas Property | Apr 2026 |
| 61031 | ISHAM | Jim Wells County, TX | Oil & Gas Property | Mar 2026 |
| 61032 | ISHAM | Texas County, OK | Gas Property | Mar 2026 |
| 61033 | ISHIBASHI | Orange County, CA | Oil & Gas Property | Jul 1989 |
| 61034 | ISHIGURO | Weld County, CO | Oil & Gas Property | Jul 2025 |
| 61035 | ISHMAN | McKean County, PA | Oil & Gas Property | Dec 2025 |
| 61036 | ISIDRO MORENO ET AL | Webb County, TX | Oil & Gas Property | Mar 2026 |
| 61037 | ISLAND | Seminole County, OK | Oil & Gas Property | Apr 2026 |
| 61038 | ISLAND BUTTE | Montezuma County, CO | Oil & Gas Property | Mar 2026 |
| 61039 | ISLAND CREEK | Lincoln County, WV | Oil & Gas Property | Dec 2021 |
| 61040 | ISLAND CREEK | Mingo County, WV | Gas Property | Dec 2021 |
| 61041 | ISLAND CREEK CO | Hopkins County, KY | Oil & Gas Property | Jan 2024 |
| 61042 | ISLAND CREEK CO | Logan County, WV | Oil & Gas Property | Dec 2021 |
| 61043 | ISLAND CREEK COAL | Upshur County, WV | Oil & Gas Property | Dec 2021 |
| 61044 | ISLAND CREEK COAL C | McDowell County, WV | Gas Property | Dec 2021 |
| 61045 | ISLAND CREEK COAL CO | Hopkins County, KY | Oil & Gas Property | Dec 2014 |
| 61046 | ISLAND LAKE 6092 12-24H | Burke County, ND | Oil & Gas Property | Apr 2026 |
| 61047 | ISLAND PARK B | Garfield County, CO | Oil & Gas Property | Jan 2026 |
| 61048 | ISLAND RANCH | Garfield County, CO | Oil & Gas Property | Mar 2026 |
| 61049 | ISLAND U | Uintah County, UT | Oil & Gas Property | Dec 2015 |
| 61050 | ISLAND U | Uintah County, UT | Oil & Gas Property | Apr 2026 |
| 61051 | ISLAND UNIT | Uintah County, UT | Oil & Gas Property | Apr 2026 |
| 61052 | ISLE | Montgomery County, KS | Gas Property | Feb 2026 |
| 61053 | ISLE ROYAL 148-95-02A-11H-TF-LL | Dunn County, ND | Oil & Gas Property | Apr 2026 |
| 61054 | ISLE ROYALE 20-5 | Dawson County, TX | Oil & Gas Property | Mar 2026 |
| 61055 | ISLER FE | Chaves County, NM | Gas Property | Apr 2026 |
| 61056 | ISLER FEDERAL | Chaves County, NM | Oil & Gas Property | Jun 2017 |
| 61057 | ISLER PENNZOIL FEDERAL | Chaves County, NM | Gas Property | Apr 2020 |
| 61058 | ISLES LANE | Caddo Parish, LA | Oil Property | Nov 2024 |
| 61059 | ISLEY I | Gregg County, TX | Oil & Gas Property | Mar 2026 |
| 61060 | ISMAY FLODINE | San Juan County, UT | Oil & Gas Property | Apr 2026 |
| 61061 | ISMERT 2 | Reno County, KS | Oil & Gas Property | Feb 2026 |
| 61062 | ISOM | Texas County, OK | Oil & Gas Property | Mar 2026 |
| 61063 | ISOM | Stevens County, KS | Gas Property | Feb 2026 |
| 61064 | ISON | Elliott County, KY | Oil Property | Dec 2023 |
| 61065 | ISON, ANDERSON | Elliott County, KY | Oil & Gas Property | Dec 2015 |
| 61066 | ISON, CALLIE | Letcher County, KY | Oil & Gas Property | Dec 2024 |
| 61067 | ISON, JAMES D | Letcher County, KY | Gas Property | Dec 2019 |
| 61068 | ISON, JEFFERSON | Letcher County, KY | Gas Property | Dec 2024 |
| 61069 | ISON, JESSE | Letcher County, KY | Oil & Gas Property | Dec 2024 |
| 61070 | ISON, MOSES 7 | Letcher County, KY | Gas Property | Dec 2024 |
| 61071 | ISON, O D | Elliott County, KY | Oil & Gas Property | Dec 2019 |
| 61072 | ISON, TIVIS & REEDA | Elliott County, KY | Oil & Gas Property | Sep 2024 |
| 61073 | ISRAEL | Ford County, KS | Oil Property | Feb 2026 |
| 61074 | ISRAEL | Wise County, TX | Oil & Gas Property | Mar 2026 |
| 61075 | ISRAEL | Morton County, KS | Oil & Gas Property | Feb 2026 |
| 61076 | ISRAEL BARNETT | Jefferson County, OK | Oil Property | Feb 2026 |
| 61077 | ISRAEL GAS UNIT | Stanton County, KS | Gas Property | Feb 2026 |
| 61078 | ISSLER | Chautauqua County, NY | Gas Property | Dec 2024 |
| 61079 | ISZLEY-USA | McKenzie County, ND | Oil & Gas Property | Apr 2026 |
| 61080 | ITALIAN STALLION | Fayette County, TX | Oil & Gas Property | Mar 2026 |
| 61081 | ITCH STATE | Lea County, NM | Oil & Gas Property | Mar 2026 |
| 61082 | ITHACA 15 14 | Eddy County, NM | Oil & Gas Property | Apr 2026 |
| 61083 | ITHACA 42 | Glasscock County, TX | Oil & Gas Property | Mar 2026 |
| 61084 | ITHAMAR 41-13TFH | Dunn County, ND | Oil & Gas Property | Apr 2026 |
| 61085 | ITTNER | Cheyenne County, NE | Oil Property | Dec 2025 |
| 61086 | IVA #1-19 | McClain County, OK | Oil & Gas Property | Apr 2026 |
| 61087 | IVA 1-6H | Williams County, ND | Oil & Gas Property | Apr 2026 |
| 61088 | IVA JO | Caddo County, OK | Oil & Gas Property | Apr 2026 |
| 61089 | IVA THOMSON | Clearfield County, PA | Gas Property | Dec 2025 |
| 61090 | IVAN | McKenzie County, ND | Oil & Gas Property | Apr 2026 |
| 61091 | IVAN AND ALBERT CHRISTENSON | Bottineau County, ND | Oil & Gas Property | Apr 2026 |
| 61092 | IVAN C FETTERMAN | Indiana County, PA | Gas Property | Dec 2025 |
| 61093 | IVAN CS FED | Campbell County, WY | Gas Property | Aug 2018 |
| 61094 | IVAN FAIL | Wilson County, KS | Gas Property | Feb 2026 |
| 61095 | IVAN GEHRINGER | Bottineau County, ND | Oil Property | Apr 2026 |
| 61096 | IVAN HECKER USA 41-6H | Dunn County, ND | Oil & Gas Property | Apr 2026 |
| 61097 | IVAN RIVER UNIT | Tyonek Quadrangle, AK | Gas Property | Feb 2026 |
| 61098 | IVAN W LEAMER | Clearfield County, PA | Gas Property | Dec 2025 |
| 61099 | IVAR THE BONELESS FEDERAL | Lea County, NM | Oil & Gas Property | Apr 2026 |
| 61100 | IVAS SMITH 0 | Live Oak County, TX | Oil & Gas Property | Mar 2026 |