67 recent activity records on file for Marathon Oil Company across TX — permits filed in the last 24 months, wells spudded in the last 90 days, wells turning to first production in the last 6 months, and drilled-uncompleted (DUC) inventory.
Refreshed monthly from TX RRC + OK OCC well-header records. Data current as of 2026-05-03.
Where Marathon Oil Company is most active across all 4 activity datasets:
Karnes, TX — 49 activity records
Atascosa, TX — 9 activity records
De Witt, TX — 6 activity records
Gonzales, TX — 3 activity records
Which formations / plays Marathon Oil Company is targeting:
Gulf Coast Basin (La - TX) — 64 activity records
Wells where Marathon Oil Company has started drilling in the last 90 days but production hasn't begun yet:
| Spud Date | Days Ago | Well | API | County | State | Formation | Lateral (ft) |
|---|---|---|---|---|---|---|---|
| 2026-04-17 | 16 | Hierholzer Quad Sa B 1 | 4225538368 |
Karnes | TX | Gulf Coast Basin (La - TX) | 8,747 |
| 2026-04-03 | 30 | Hierholzer-Hedtke Unit 5 | 4225538361 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,634 |
| 2026-04-03 | 30 | Mueller-Warner Sa2 501h | 4225538366 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,736 |
| 2026-03-06 | 58 | Kirk-Debill Sa5 5h | 4225538273 |
Karnes | TX | Gulf Coast Basin (La - TX) | 3,762 |
| 2026-03-06 | 58 | Hierholzer-Hedtke Unit 4 | 4225538360 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,660 |
Marathon Oil Company wells whose first production date falls in the last 6 months — wells that just started generating royalty checks:
| First Prod | Days Producing | Well | API | County | State | Formation | Lateral (ft) |
|---|---|---|---|---|---|---|---|
| 2026-01-01 | 122 | Griffin-Krueger Sa2 2h | 4201336231 |
Atascosa | TX | Gulf Coast Basin (La - TX) | 13,697 |
| 2026-01-01 | 122 | Griffin-Krueger Sa1 1h | 4201336230 |
Atascosa | TX | Gulf Coast Basin (La - TX) | 14,115 |
| 2026-01-01 | 122 | Griffin-Krueger Sa4 4h | 4201336233 |
Atascosa | TX | Gulf Coast Basin (La - TX) | 13,244 |
| 2026-01-01 | 122 | Griffin-Krueger Sa3 3h | 4201336232 |
Atascosa | TX | Gulf Coast Basin (La - TX) | 13,247 |
Wells Marathon Oil Company has spudded but not yet completed — near-term production upside as completion crews arrive:
| Spud Date | Days Waiting | Well | API | County | State | Formation | Lateral (ft) |
|---|---|---|---|---|---|---|---|
| 2026-04-17 | 16 | Hierholzer Quad Sa B 1 | 4225538368 |
Karnes | TX | Gulf Coast Basin (La - TX) | 8,747 |
| 2026-04-03 | 30 | Mueller-Warner Sa2 501h | 4225538366 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,736 |
| 2026-04-03 | 30 | Hierholzer-Hedtke Unit 5 | 4225538361 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,634 |
| 2026-03-06 | 58 | Hierholzer-Hedtke Unit 4 | 4225538360 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,660 |
| 2026-03-06 | 58 | Kirk-Debill Sa5 5h | 4225538273 |
Karnes | TX | Gulf Coast Basin (La - TX) | 3,762 |
| 2025-11-28 | 156 | Wright-Ethridge Sa3 3h | 4201336261 |
Atascosa | TX | Gulf Coast Basin (La - TX) | 7,874 |
| 2025-11-07 | 177 | Johnson-Tschirhart Unit 7h | 4225538268 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,310 |
| 2025-10-24 | 191 | Anne Friar Thomas Ac 9h | 4212335470 |
De Witt | TX | Gulf Coast Basin (La - TX) | 7,348 |
| 2025-10-03 | 212 | Mauch-Wright-Ethridge Sa2 2h | 4201336260 |
Atascosa | TX | Gulf Coast Basin (La - TX) | 9,049 |
The most recent 49 drilling permits filed by Marathon Oil Company:
| Permit Date | Well | API | County | State | Formation | Lateral (ft) |
|---|---|---|---|---|---|---|
| 2026-04-23 | Martinez-Henke Sa A 1 | 4225538387 |
Karnes | TX | — | — |
| 2026-04-21 | Martinez-Henke Unit 4 | 4225538385 |
Karnes | TX | — | — |
| 2026-04-21 | Martinez Unit 3 | 4225538384 |
Karnes | TX | — | — |
| 2026-04-02 | Hemb-Black-Levi Sa A 1 | 4225538369 |
Karnes | TX | Gulf Coast Basin (La - TX) | 15,830 |
| 2026-04-02 | Hemb-Black-Levi Sa B 1 | 4225538370 |
Karnes | TX | Gulf Coast Basin (La - TX) | 15,407 |
| 2026-03-17 | Kirk-Debill Sa1 505h | 4225538354 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,568 |
| 2026-03-11 | Mueller-Warner Sa2 501h | 4225538366 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,736 |
| 2026-03-11 | Mueller-Warner Sa3 3h | 4225538367 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,255 |
| 2026-03-11 | Mueller-Warner Sa1 1h | 4225538365 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,822 |
| 2026-02-26 | Hierholzer Quad Sa B 1 | 4225538368 |
Karnes | TX | Gulf Coast Basin (La - TX) | 8,747 |
| 2026-02-18 | Kirk-Debill Sa5 5h | 4225538273 |
Karnes | TX | Gulf Coast Basin (La - TX) | 3,762 |
| 2026-02-17 | Kirk-Debill Sa4 4h | 4225538355 |
Karnes | TX | Gulf Coast Basin (La - TX) | 8,543 |
| 2026-02-17 | Kirk-Debill Sa3 506h | 4225538357 |
Karnes | TX | Gulf Coast Basin (La - TX) | 8,171 |
| 2026-02-17 | Kirk-Debill Sa2 2h | 4225538356 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,848 |
| 2026-02-17 | Kirk-Butler B Sa1 1h | 4225538358 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,007 |
| 2026-02-11 | Schendel-Douglas Sa4 504h | 4225538363 |
Karnes | TX | Gulf Coast Basin (La - TX) | 9,089 |
| 2026-02-11 | Schendel-Douglas Sa5 503h | 4225538364 |
Karnes | TX | Gulf Coast Basin (La - TX) | 8,949 |
| 2026-02-04 | Hier-Mey-Hed Sa A 1 | 4225538362 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,739 |
| 2026-01-29 | Hierholzer-Hedtke Unit 5 | 4225538361 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,634 |
| 2026-01-29 | Hierholzer-Hedtke Unit 4 | 4225538360 |
Karnes | TX | Gulf Coast Basin (La - TX) | 7,660 |
| 2025-09-30 | Mauch-Wright-Ethridge Sa2 2h | 4201336260 |
Atascosa | TX | Gulf Coast Basin (La - TX) | 9,049 |
| 2025-09-23 | Mauch-Ethridge Sa1 1h | 4201336259 |
Atascosa | TX | Gulf Coast Basin (La - TX) | 9,257 |
| 2025-09-23 | Wright-Ethridge Sa3 3h | 4201336261 |
Atascosa | TX | Gulf Coast Basin (La - TX) | 7,874 |
| 2025-07-08 | Edward Roeder-James Gano Sa1 1h | 4212335597 |
De Witt | TX | Gulf Coast Basin (La - TX) | 8,395 |
| 2025-06-30 | Edward Roeder-Migura A Sa1 1h | 4212335609 |
De Witt | TX | Gulf Coast Basin (La - TX) | 6,662 |
| 2025-06-27 | Johnson-Tschirhart Unit 10h | 4225538271 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,256 |
| 2025-06-18 | Miller Ridout Mikkelson Sa3 3h | 4225538265 |
Karnes | TX | Gulf Coast Basin (La - TX) | 5,364 |
| 2025-05-20 | Miller Ridout Mikkelson Sa1 1h | 4225538261 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,971 |
| 2025-05-16 | Johnson-Tschirhart Unit 7h | 4225538268 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,310 |
| 2025-05-16 | Miller-Ridout Unit 502h | 4225538262 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,543 |
| 2025-05-16 | Johnson-Tschirhart Unit 8h | 4225538269 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,240 |
| 2025-05-16 | Johnson-Tschirhart Unit Ac 10h | 4225538272 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,187 |
| 2025-05-16 | Johnson-Tschirhart Unit 9h | 4225538270 |
Karnes | TX | Gulf Coast Basin (La - TX) | 4,223 |
| 2025-04-29 | Fransen-Direct Assets Sa1 1h | 4225538258 |
Karnes | TX | Gulf Coast Basin (La - TX) | 6,782 |
| 2025-04-29 | Fransen-Direct Assets Sa2 2h | 4225538259 |
Karnes | TX | Gulf Coast Basin (La - TX) | 6,721 |
| 2025-04-21 | Fransen Unit 7h | 4225538257 |
Karnes | TX | Gulf Coast Basin (La - TX) | 6,874 |
| 2025-01-08 | Cherry Bergey Selman Sa5 5h | 4217734760 |
Gonzales | TX | Gulf Coast Basin (La - TX) | 7,705 |
| 2024-12-13 | Cherry Bergey Selman Sa4 4h | 4217734759 |
Gonzales | TX | Gulf Coast Basin (La - TX) | 7,415 |
| 2024-12-13 | Cherry Bergey Sa1 1h | 4217734758 |
Gonzales | TX | Gulf Coast Basin (La - TX) | 6,714 |
| 2024-10-14 | Best Fenner-Morgan Sa1 1h | 4225538165 |
Karnes | TX | Gulf Coast Basin (La - TX) | 8,220 |
| 2024-10-09 | Thomas-Anne Sa2 2h | 4212335471 |
De Witt | TX | Gulf Coast Basin (La - TX) | 2,086 |
| 2024-10-09 | Anne Friar Thomas Ac 9h | 4212335470 |
De Witt | TX | Gulf Coast Basin (La - TX) | 7,348 |
| 2024-10-09 | Anne Friar Thomas 7h | 4212335469 |
De Witt | TX | Gulf Coast Basin (La - TX) | 7,567 |
| 2024-10-09 | Best Bateman-Best Huth Sa1 1h | 4225538164 |
Karnes | TX | Gulf Coast Basin (La - TX) | 1,213 |
| 2024-09-26 | Felix-Smith Mellick Sa 1h | 4225538149 |
Karnes | TX | Gulf Coast Basin (La - TX) | 5,434 |
| 2024-09-25 | Felix Unit 4h | 4225538146 |
Karnes | TX | Gulf Coast Basin (La - TX) | 5,486 |
| 2024-09-25 | Felix Unit 3h | 4225538147 |
Karnes | TX | Gulf Coast Basin (La - TX) | 5,540 |
| 2024-09-25 | Felix Unit 9h | 4225538148 |
Karnes | TX | Gulf Coast Basin (La - TX) | 5,620 |
| 2024-09-25 | Felix Unit 5h | 4225538145 |
Karnes | TX | Gulf Coast Basin (La - TX) | 5,451 |
A new permit, fresh spud, or recently producing well on or near your tract can materially change what your interest is worth. Get a free written offer based on your specific minerals.
Get Your Free Mineral ValuationOperator: Marathon Oil Company
States active: TX
Total activity: 67
Permits 24mo: 49
Spuds 90d: 5
New producers: 4
DUC inventory: 9
Last refresh: 2026-05-03
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