OPERATORS · TEXAS · P-5 NUMBER 525398 · GONZALES COUNTY
Marathon Oil EF LLC in Gonzales County
One operator, one county: its permits, wells of record, formations, and leases here, with the rest of the county and the rest of the operator one click away.
Marathon Oil Ef LLC has 209 drilling permits on file in Gonzales County, the first issued in 2010 and the latest on July 21, 2026.
5 of them came in the last twelve months, 62% fewer than the year before; 100% horizontal, averaging 17,500 ft.
It is operator of record on 6 wells in the county: 0 producing, 1 shut in, 0 injection.
Its completed wells here most often report Austin Chalk, Anacacho, Eagle Ford.
- 5
- permits, 12 months -62%
- 209
- permits, all time since 2010
- 100%
- horizontal, 12 months
- 17,500
- ft average depth, 12 months
- 6
- wells of record
- 0
- producing · 1 shut in · 0 injection
Permits issued by month
LAST FIVE YEARS · GONZALES ONLY
Last 12 months 5 · prior 12 13(-62%)
Latest permits here
| Issued | Lease / well | Type | Depth |
|---|---|---|---|
| Jul 21, 2026 | Barnhart (Ef)-HFS SA9 #139H 917222 | DrillHZ | 17,500 |
| Jul 21, 2026 | Barnhart (Ef)-HFS SA10 #140H 917223 | DrillHZ | 17,500 |
| Jul 16, 2026 | Barnhart (EF) #207H 917219 | DrillHZ | 17,500 |
| Jul 16, 2026 | Barnhart (EF) #206H 917218 | DrillHZ | 17,500 |
| Jul 16, 2026 | Barnhart (EF) #205H 917217 | DrillHZ | 17,500 |
| Jun 25, 2026 | Barnhart (Ef)-JM Pres SA #512H 916582 | DrillHZ | 17,500 |
| Jun 24, 2026 | Barnhart (EF) K-JM Pres SA #511H 916581 | DrillHZ | 17,500 |
| Jan 8, 2025 | Cherry Bergey Selman SA5 #5H 904554 | DrillHZ | 22,000 |
| Dec 13, 2024 | Cherry Bergey Selman SA4 #4H 904553 | DrillHZ | 19,056 |
| Dec 13, 2024 | Cherry Bergey SA1 #1H 904552 | DrillHZ | 17,039 |
All 209 permits in Gonzales County, searchable → · Wells of record here →
Permit types and formations
Permit types
- Drill
- 5 / 209
12 MONTHS / ALL TIME
Formations reported
- Buda
- 2
Leases it reports here
| Lease | Wells | Oil, bbl | Last reported |
|---|---|---|---|
| Barnhart (EF) | 60 | 15M | Apr 2026 |
| Burrow | 8 | 2.21M | Apr 2026 |
| Drake-Borchers Unit | 10 | 1.98M | Apr 2026 |
| Barnhart (EF) K | 10 | 1.75M | Apr 2026 |
| Barnhart (EF) G | 7 | 1.32M | Apr 2026 |
| Barnhart (EF) J | 4 | 1.27M | Apr 2026 |
| Barnhart (EF) E | 6 | 1.18M | Apr 2026 |
| Barnhart (EF) D | 8 | 1.06M | Apr 2026 |
| Bilsky Unit | 4 | 906K | Apr 2026 |
| Brown Investments | 3 | 569K | Apr 2026 |
| Hall-Manning | 4 | 564K | Apr 2026 |
| Barnhart (EF) H | 2 | 555K | Apr 2026 |
| Barnhart (EF) 2H Unit | 4 | 513K | Apr 2026 |
| Barnhart (EF) C-E SA 3 | 1 | 483K | Apr 2026 |
| Barnhart (Ef)-J.M. Preston SA5 | 1 | 481K | Apr 2026 |
All leases it reports → · Other operators in Gonzales County →
About this data
Permits from the RRC OGA049M master and daily daf420 files; wells of record and status from the EWA wellbore schedule, weekly; formations from the dbf900 wellbore file; leases from PDQ lease reports, placed in the county by the wells completed on them.
Developers: this page as JSON is GET /v1/data/operators/tx/525398/counties/gonzales, documented in the API reference.