COUNTIES · EAGLE FORD SHALE · DISTRICT 01 · CODE 311
McMullen County
Mcmullen County permitting is running 7.7 permits a month over the trailing 90 days (23 total, down 28% on the prior quarter).
Gulftex Energy, LLC leads with 19 permits in the past 12 months, one of 17 operators active in the county.
5 operators filed a first Mcmullen County permit in the past year.
Median permitted depth over the past year is 11,600 ft (prior year: 11,800 ft); 90% of the past year's permits are horizontal.
The county has 50 active disposal and injection permits, with 36.4M barrels injected in the 12 months reported through June 2025.
TexNet located 39 earthquakes of magnitude 2 or more in the county's permit footprint over the past two years, the largest M2.8.
8,573 drilling permits have been issued in Mcmullen County since 1977.
8,573 permits on file since 1977 · last issued Oct 21, 2026
Watch McMullen CountyAlso: every McMullen County well in the statewide list, searchable → · a year of permits on the map →
- 23
- permits issued, 90d
- -28%
- vs prior 90d (32)
- 5
- operators filing
- 100%
- horizontal
- 11,339
- avg permitted depth, ft
- 583
- operators, all time
WINDOWS ON THE RRC ISSUE DATE · COMPUTED OCT 29, 2026 · WHY ISSUE AND SEEN DATES DIFFER
Permits issued by month
LAST 115 MONTHS · BY ISSUE DATE
Last 12 months 108 · prior 12 172(-37%)
Top operators, last 12 months
By permits issued. Wells are the operator’s current inventory here from the RRC wellbore file.
New entrants, last 12 months
Operators whose first permit in McMullen County came in the last year. 5 in total.
- Silver Hill Energy Operating LLC9 permitsSep 23, 2026 · active elsewhere first
- Columbus Energy, LLC2 permitsApr 20, 2026 · active elsewhere first
- Shore Petroleum Corp.1 permitJun 2, 2026 · active elsewhere first
- Evx Operating LLC1 permitJan 27, 2026 · new to Texas permits
- Etc Texas P/L, Ltd1 permitNov 18, 2025 · new to Texas permits
Formations in completed wells
RRC WELLBORE FILE · ≥10 WELLS
Tops reported on completion filings for wells in McMullen County. A well counts for every formation it reports, so this reads as the county's stratigraphic column. About tops →
| Formation | Wells | Permitted last 3 yrs | Median top, ft | P10–P90 |
|---|---|---|---|---|
| Olmos | 2,726 | 220 | 8,916 | 7,499–10,538 |
| Wilcox | 2,286 | 191 | 4,831 | 3,035–7,170 |
| Austin Chalk | 2,206 | 238 | 10,354 | 9,124–11,694 |
| Eagle Ford | 2,202 | 212 | 10,654 | 9,488–12,039 |
| Anacacho | 2,146 | 261 | 9,993 | 8,866–11,480 |
| Navarro | 1,853 | 161 | 8,130 | 6,469–9,539 |
| Escondido | 1,266 | 151 | 7,500 | 6,177–9,262 |
| Carrizo | 1,134 | 29 | 4,615 | 3,230–5,087 |
| Yegua | 1,099 | 94 | 1,988 | 233–2,890 |
| Queen City | 961 | 17 | 3,208 | 2,270–5,100 |
| Catahoula | 642 | 33 | 1,590 | 273–1,590 |
| Frio | 634 | 23 | 1,460 | 440–1,597 |
| Sparta | 613 | 11 | 2,978 | 2,302–3,268 |
| Midway | 399 | 22 | 7,156 | 6,334–7,942 |
| San Miguel | 182 | 0 | 9,192 | 8,051–9,649 |
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Disposal and injection
- 50
- active UIC permits of 246
- 388K
- permitted bbl/day, active
- 36.4M
- bbl injected, last 12 reported months
- Jun 2025
- reported through
Every active well, operator, and daily reporter in McMullen County →
Permitted volume is a ceiling, not throughput. How to read it →
TexNet catalog via USGS
Seismicity, last 2 years
- 39
- M2+ events in the area
- M2.8
- largest
Monthly counts, magnitudes, and every recent event in the area →
Events are not tagged with a county; this counts M2+ events inside the bounding box of the county’s located permits, padded 0.1°. About TexNet →
Latest permits
NEWEST FIRST BY ISSUE DATE
| Permit | Seen | Issued | Operator | Lease / well | Depth | API |
|---|---|---|---|---|---|---|
| 919558 | Nov 1, 2026 | Oct 30, 2026 | Crescent Energy Operating, LLC | Chine 101HF #101HFH | 12,000 | 31137733 |
| 919557 | Nov 1, 2026 | Oct 30, 2026 | Crescent Energy Operating, LLC | Chine 101HE #101HEH | 12,000 | 31137732 |
| 919556 | Nov 1, 2026 | Oct 30, 2026 | Crescent Energy Operating, LLC | Chine 101HD #101HDH | 12,000 | 31137731 |
| 919554 | Nov 1, 2026 | Oct 30, 2026 | Crescent Energy Operating, LLC | Chine 101HC #101HCH | 12,000 | 31137730 |
| 919553 | Nov 1, 2026 | Oct 30, 2026 | Crescent Energy Operating, LLC | Chine 101HB #101HBH | 12,000 | 31137729 |
| 919551 | Oct 23, 2026 | Oct 21, 2026 | Crescent Energy Operating, LLC | Chine 101HA #101HAH | 12,000 | 31137728 |
| 919174 | Oct 16, 2026 | Oct 14, 2026 | Verdun Oil & Gas LLC | Rickenbacker B #2HH | 11,500 | 31137727 |
| 919171 | Oct 15, 2026 | Oct 13, 2026 | Verdun Oil & Gas LLC | Rickenbacker A #1HH | 11,500 | 31137726 |
| 918662 | Oct 2, 2026 | Sep 30, 2026 | Silver Hill Energy Operating LLC | USA Lark #4AHH | 11,800 | 31137725 |
| 918635 | Sep 30, 2026 | Sep 28, 2026 | Silver Hill Energy Operating LLC | USA Lark #2AHH | 11,800 | 31137716 |
About this data
Drilling permits from the RRC OGA049M master and daily daf420 files, rebuilt nightly into per-county figures; windows are on the date issued. Disposal from UIC permits and H-10 reports at the last settled month; earthquakes from the TexNet catalog inside the county's located-permit footprint.
Developers: this page as JSON is GET /v1/data/counties/tx/mcmullen?days=90, documented in the API reference.