COUNTIES · EAGLE FORD SHALE · DISTRICT 01 · CODE 311
McMullen County, Texas
Mcmullen County permitting is running 10 permits a month over the trailing 90 days (30 total, up 15% on the prior quarter). 2 were issued in the past week.
Gulftex Energy, LLC leads with 16 permits in the past 12 months, one of 16 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 11,800 ft; 91% 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.
37 earthquakes of magnitude 2 or more were located in the county's permit footprint over the past two years, the largest M2.8.
7,428 drilling permits have been issued in Mcmullen County since 1977.
7,428 permits on file since 1977 · last issued Nov 6, 2026
Email me new permitsAlso: every McMullen County well in the statewide list, searchable → · a year of permits on the map →
- 30
- permits issued, 90d
- +15%
- vs prior 90d (26)
- 5
- operators filing
- 100%
- horizontal
- 11,440
- avg permitted depth, ft
- 578
- operators, all time
WINDOWS ON THE RRC ISSUE DATE · COMPUTED NOV 9, 2026 · WHY ISSUE AND SEEN DATES DIFFER
Permits issued by month
LAST 120 MONTHS · BY ISSUE DATE
Last 12 months 93 · prior 12 140(-34%)
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 →
Fewer than ten wells in McMullen County report the Jackson, so it is below this table's cutoff. Back to the formation →
| 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 | 2,203 | 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 | 183 | 0 | 9,192 | 8,052–9,648 |
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 →
USGS catalog, Texas
Seismicity, last 2 years
- 37
- 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 |
|---|---|---|---|---|---|---|
| 919908 | Nov 9, 2026 | Nov 6, 2026 | Verdun Oil & Gas LLC | Sauterelle Unit A #2HH | 11,200 | 31137739 |
| 919907 | Nov 9, 2026 | Nov 6, 2026 | Verdun Oil & Gas LLC | Sauterelle Unit A #1HH | 11,200 | 31137738 |
| 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 |
Questions about McMullen County
How many drilling permits were issued in McMullen County in the last 12 months?
99 permits were issued in McMullen County in the last 12 months, down 32% from 146 in the 12 months before. 91% were for horizontal wells. The most recent was issued Nov 6, 2026. 7,428 are on file since 1977.
Every McMullen County permit →Who is the most active operator in McMullen County?
By drilling permits filed in the last 12 months, Gulftex Energy, LLC is the most active operator in McMullen County, with 16 of 99, followed by EOG Resources, Inc. (15) and Verdun Oil & Gas LLC (12). 5 operators filed permits here in the last 90 days.
Operators in McMullen County →How many oil and gas wells are in McMullen County?
7,823 wells are on file in McMullen County, including 3,215 active, 2,357 plugged, and 34 permitted and not yet drilled. 2,748 are horizontal. The active wells are under 81 operators.
Every well in McMullen County →How much oil and gas does McMullen County produce?
The Railroad Commission files oil and gas production by lease, not by well or by county. Each lease with wells in McMullen County is listed with its reported production on the county's Leases tab.
Leases in McMullen County →How much water is injected in McMullen County?
36.4 million barrels of water were injected in McMullen County in the 12 months through June 2025, reported on form H-10. 50 of the county's 246 disposal and injection permits are active.
Disposal and injection in McMullen County →What formations are drilled in McMullen County?
Completion filings for wells in McMullen County report tops for 15 formations in at least ten wells each. The most reported are the Olmos (2,726 wells, median top 8,916 ft), the Wilcox (2,286 wells, median top 4,831 ft), and the Austin Chalk (2,206 wells, median top 10,354 ft).
Formations in McMullen County →What basin is McMullen County in?
Petrora lists McMullen County in the Eagle Ford Shale. It is in the Railroad Commission's District 01.
The Eagle Ford Shale →Have there been earthquakes in McMullen County?
37 earthquakes of magnitude 2 or more were located in the area of McMullen County's permitted wells in the last 2 years; the largest was M2.8.
Earthquakes in McMullen County →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.