| May-Chapman O-1-16009 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 9 | 2.12M | 3.26M | Jun 2012 – Aug 2026 |
| State Chapman 26-27 Unit O-10-52084 | Diamondback E&P LLC only | Hoefs T-K (Wolfcamp) | Pecos | 3 | 1.52M | 1.91M | Oct 2018 – Aug 2026 |
| Chapman-Rogers Unit O-2-9809 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-2) | Karnes | 8 | 1.5M | 4.1M | Sep 2011 – Aug 2026 |
| H.T. Chapman 02 O-2-9770 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 7 | 951K | 1.54M | May 2011 – Nov 2024 |
| Chapman Rothe Unit O-1-15604 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 6 | 874K | 1.2M | May 2011 – Aug 2026 |
| Schroeder-Chapman Unit O-1-15555 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 5 | 804K | 1.31M | Jul 2011 – Aug 2026 |
| H. T. Chapman 01 O-2-9960 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 6 | 734K | 1.84M | Mar 2011 – Jul 2026 |
| Chapman State O-10-40363 | Permian Resources Operating, LLC only | Wolfbone (Trend Area) | Reeves | 5 | 664K | 1.24M | Dec 2010 – Aug 2026 |
| Retzloff-Chapman Unit O-2-10196 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-2) | Live Oak | 3 | 615K | 979K | Aug 2012 – Aug 2026 |
| Chapman State 32-41-4S O-10-51075 | Permian Resources Operating, LLC only | Wolfbone (Trend Area) | Reeves | 1 | 582K | 1.48M | Sep 2018 – Aug 2026 |
| Chapman Pfeil Unit O-1-15659 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 3 | 534K | 784K | May 2011 – Jul 2025 |
| Chapman-Hummel Unit O-2-10297 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-2) | Karnes | 4 | 522K | 745K | Oct 2012 – Aug 2026 |
| Chapman State 32-41-3S O-10-51023 | Permian Resources Operating, LLC only | Wolfbone (Trend Area) | Reeves | 1 | 497K | 1.36M | Sep 2018 – Aug 2026 |
| Chapman State 32-41-5S O-10-51014 | Permian Resources Operating, LLC only | Wolfbone (Trend Area) | Reeves | 1 | 489K | 1.27M | Sep 2018 – Aug 2026 |
| May Girls-Chapman Unit O-2-10641 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-2) | Atascosa | 4 | 474K | 730K | Nov 2013 – Jul 2026 |
| Chapman -C- O-14-520 | Rio Petroleum, Inc. only | Panhandle Gray County Field | Gray | 1 | 447K | 18K | by Jan 1993 – Aug 2026 |
| Chapman State 32-41-2S O-10-51080 | Permian Resources Operating, LLC only | Wolfbone (Trend Area) | Reeves | 1 | 442K | 997K | Sep 2018 – Aug 2026 |
| Chapman State 32-41-1S O-10-50725 | Permian Resources Operating, LLC only | Wolfbone (Trend Area) | Reeves | 1 | 368K | 851K | Aug 2018 – Aug 2026 |
| H. T. Chapman 03 O-2-9841 | Sea Eagle Ford, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 350K | 674K | Aug 2011 – Apr 2019 |
| Tipi Chapman 34-163 O-10-44032 | Apache Corporation only | Phantom (Wolfcamp) | Ward | 4 | 345K | 723K | Feb 2013 – Aug 2026 |
| Chapman-Pfeil 1H Psa O-1-19585 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 338K | 538K | May 2019 – Aug 2026 |
| Hierholzer-Chapman SA O-1-21193 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 329K | 336K | Mar 2024 – Aug 2026 |
| Chapman Unit O-11-65203 | Schlachter Operating Corporation only | Sharon Ridge (1700) | Scurry | 39 | 294K | 3.4K | by Jan 1993 – Aug 2026 |
| Chapman O-4-12700 | Geiser Operating, Inc. only | Arnold-David, North (Hight Sand) | Nueces | 2 | 277K | 198K | Sep 1997 – May 2019 |
| Chapman-Pfeil Allocation O-1-18361 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 276K | 584K | Jan 2015 – Jun 2025 |
| H T Chapman 02 O-2-12808 | Crescent Energy Operating, LLC only | Sugarkane (Austin Chalk) | Live Oak | 1 | 262K | 467K | Apr 2024 – Aug 2026 |
| Chapman /10/ O-14-424 | Exxcel Production Company only | Panhandle Gray County Field | Gray | 4 | 259K | 158K | by Jan 1993 – Aug 2026 |
| Chapman-Pfeil 2H Psa O-1-19696 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 247K | 362K | May 2019 – Jun 2026 |
| R May a-May Girls Chapman SA2 O-1-21798 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 245K | 321K | Jun 2025 – Aug 2026 |
| R May a-Schroeder Chapman SA1 O-1-21797 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 240K | 324K | Jun 2025 – Aug 2026 |
| Chapman-Abbott Unit O-1-9246 | Genesis Well Service only | Chapman Abbott | Williamson | 52 | 233K | 780 | by Jan 1993 – Aug 2026 |
| Chapman "B" O-11-5694 | Unitex Oil & Gas, L.L.C. only | Sharon Ridge (1700) | Scurry | 6 | 232K | 25 | by Jan 1993 – Aug 2026 |
| Chapman-Pfeil 4H Psa O-1-19591 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 1 | 226K | 341K | May 2019 – Feb 2026 |
| Chapman, A. -a- NCT-2 O-14-1533 | Diamond S Energy Company only | Panhandle Gray County Field | Gray | 9 | 221K | 111K | by Jan 1993 – Aug 2026 |
| Chapman /49/ O-14-425 | Exxcel Production Company only | Panhandle Gray County Field | Gray | 14 | 207K | 218K | by Jan 1993 – Aug 2026 |
| Chapman O-4-13410 | Sun Exploration, Inc. only | Chapman Ranch (Upper Frio Cons.) | Nueces | 6 | 177K | 22.3K | Nov 2006 – Jan 2026 |
| Chapman Esse Psa E D O-2-12287 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 171K | 389K | Dec 2021 – Aug 2026 |
| Chapman O-14-668 | Ponderosa TX Operating LLC only | Panhandle Gray County Field | Gray | 7 | 169K | 181K | by Jan 1993 – Aug 2026 |
| Chapman "A" O-11-5693 | Unitex Oil & Gas, L.L.C. only | Sharon Ridge (1700) | Scurry | 13 | 160K | 25 | by Jan 1993 – Aug 2026 |
| Chapman Esse Psa E E O-2-12292 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 157K | 396K | Dec 2021 – Aug 2026 |
| Chapman /50/ O-14-426 | Exxcel Production Company only | Panhandle Gray County Field | Gray | 11 | 157K | 127K | by Jan 1993 – Aug 2026 |
| Chapman Esse Psa E B O-2-12291 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 155K | 389K | Dec 2021 – Jul 2026 |
| H. T. Chapman 01 Psa O-2-11799 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 149K | 570K | Aug 2019 – Jul 2026 |
| Chapman O-4-13104 | Ventex Operating Corp. only | Arnold-David, North (Hight Sand) | Nueces | 3 | 141K | 0 | Aug 2002 – Jun 2021 |
| Chapman O-4-12508 | Geiser Operating, Inc. only | Arnold-David, North (Lindsey) | Nueces | 3 | 136K | 265K | Nov 1995 – Jul 2003 |
| Chapman Hummel-Carpenter SA1 O-2-12824 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-2) | Karnes | 1 | 135K | 173K | Jul 2024 – Aug 2026 |
| Chapman Esse Psa E F O-2-12283 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 121K | 306K | Dec 2021 – Aug 2026 |
| Chapman Esse Psa E A O-2-12290 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 121K | 271K | Dec 2021 – Jul 2026 |
| Chapman Esse Psa E C O-2-12286 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 117K | 281K | Dec 2021 – Aug 2026 |
| Chapman Esse Psa E O-2-12289 | Crescent Energy Operating, LLC only | Eagleville (Eagle Ford-2) | Live Oak | 1 | 113K | 293K | Dec 2021 – Jul 2026 |