COUNTIES · TEXAS GULF COAST · DISTRICT 03 · CODE 185
Grimes County, Texas
Grimes County permitting is running 0.3 permits a month over the trailing 90 days (1 total, after a quiet prior quarter).
CML Exploration, LLC leads with 1 permit in the past 12 months, the only operator active in the county.
Median permitted depth over the past year is 8,950 ft (prior year: 12,000 ft); 100% of the past year's permits are horizontal.
The county has 10 active disposal and injection permits, with 3.06M barrels injected in the 12 months reported through June 2025.
1,016 drilling permits have been issued in Grimes County since 1977.
1,016 permits on file since 1977 · last issued Sep 15, 2026
Watch Grimes CountyAlso: every Grimes County well in the statewide list, searchable → · a year of permits on the map →
- 1
- permits issued, 365d
- -86%
- vs prior 365d (7)
- 1
- operators filing
- 100%
- horizontal
- 8,950
- avg permitted depth, ft
- 185
- operators, all time
WINDOWS ON THE RRC ISSUE DATE · COMPUTED NOV 5, 2026 · WHY ISSUE AND SEEN DATES DIFFER
Permits issued by month
LAST 120 MONTHS · BY ISSUE DATE
Last 12 months 1 · prior 12 7(-86%)
Top operators, last 12 months
By permits issued. Wells are the operator’s current inventory here from the RRC wellbore file.
| Operator | Permits | Wells |
|---|---|---|
| CML Exploration, LLC | 1 | 36 |
New entrants, last 12 months
Operators whose first permit in Grimes County came in the last year. None.
Formations in completed wells
RRC WELLBORE FILE · ≥10 WELLS
Tops reported on completion filings for wells in Grimes 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 |
|---|---|---|---|---|
| Austin Chalk | 322 | 1 | 11,354 | 8,466–14,067 |
| Woodbine | 94 | 0 | 9,022 | 8,742–9,617 |
| Pecan Gap | 84 | 0 | 11,980 | 8,334–13,768 |
| Buda | 66 | 1 | 10,020 | 9,506–10,752 |
| Sub-Clarksville | 65 | 0 | 8,978 | 8,768–9,999 |
| Wilcox | 64 | 3 | 2,876 | 1,897–7,363 |
| Georgetown | 59 | 1 | 10,171 | 9,535–12,157 |
| Midway | 28 | 0 | 7,095 | 5,056–10,994 |
| Eagle Ford | 26 | 0 | 10,613 | 8,941–14,464 |
| Jackson | 17 | 2 | 2,495 | 1,541–3,554 |
| Navarro | 17 | 0 | 8,846 | 7,715–11,059 |
| Cook Mountain | 16 | 1 | 2,464 | 102–4,075 |
| Yegua | 15 | 1 | 3,665 | 2,664–4,512 |
| Taylor | 14 | 0 | 12,235 | 9,809–13,890 |
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Disposal and injection
- 10
- active UIC permits of 26
- 110K
- permitted bbl/day, active
- 3.06M
- bbl injected, last 12 reported months
- Jun 2025
- reported through
Every active well, operator, and daily reporter in Grimes County →
Permitted volume is a ceiling, not throughput. How to read it →
TexNet catalog via USGS
Seismicity, last 2 years
- 0
- M2+ events in the area
- —
- 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 |
|---|---|---|---|---|---|---|
| 918607 | Sep 17, 2026 | Sep 15, 2026 | CML Exploration, LLC | Nevill AC #1H | 8,950 | 18530904 |
| 910121 | Sep 16, 2025 | Sep 16, 2025 | Paleo Oil Company LLC | N. T. Breaux #01 | 3,000 | 18530867 |
| 909557 | Aug 1, 2025 | Aug 1, 2025 | Galloway Energy Co. | T.J. Tucker Unit No. 2 #3 | 12,800 | 18530902 |
| 909151 | Jul 16, 2025 | Jul 16, 2025 | Magnetar Operating LLC | Ashley #1 | 14,000 | 18530901 |
| 909151 | Jul 16, 2025 | Jul 16, 2025 | Magnetar Operating LLC | Ashley #1 | 14,000 | 18530901 |
| 909195 | Jul 15, 2025 | Jul 15, 2025 | CML Exploration, LLC | Knotts #1REH | 9,300 | 18530641 |
| 908120 | May 22, 2025 | May 22, 2025 | National Oilwell Varco, L.P. | Nov-Rdtc Test Well #4000D | 12,000 | 18530892 |
| 906019 | Feb 20, 2025 | Feb 20, 2025 | Galloway Energy Co. | Tucker, T.J. #1 | 9,680 | 18530233 |
| 891515 | Jun 27, 2023 | Jun 27, 2023 | National Oilwell Varco, L.P. | Nov-Rdtc Test Well #4000D | 12,000 | 18530892 |
| 879514 | May 4, 2022 | May 4, 2022 | Pride Energy Company | Lewis #2 | 5,500 | 18530900 |
Questions about Grimes County
How many drilling permits were issued in Grimes County in the last 12 months?
1 permit was issued in Grimes County in the last 12 months, down 86% from 7 in the 12 months before. 100% were for horizontal wells. The most recent was issued Sep 15, 2026. 1,016 are on file since 1977.
Every Grimes County permit →Who is the most active operator in Grimes County?
By drilling permits filed in the last 12 months, CML Exploration, LLC is the most active operator in Grimes County, with 1 of 1. 1 operator filed permits here in the last 90 days.
Operators in Grimes County →How many oil and gas wells are in Grimes County?
736 wells are on file in Grimes County: 225 active and 342 plugged. 358 are horizontal, and 20 operators hold them.
Every well in Grimes County →How much oil and gas does Grimes County produce?
The Railroad Commission files oil and gas production by lease, not by well or by county. Each lease with wells in Grimes County is listed with its reported production on the county's Leases tab.
Leases in Grimes County →How much water is injected in Grimes County?
3.1 million barrels of water were injected in Grimes County in the 12 months through June 2025, reported on form H-10. 10 of the county's 26 disposal and injection permits are active.
Disposal and injection in Grimes County →What formations are drilled in Grimes County?
Completion filings for wells in Grimes County report tops for 14 formations in at least ten wells each. The most reported are the Austin Chalk (322 wells, median top 11,354 ft), the Woodbine (94 wells, median top 9,022 ft), and the Pecan Gap (84 wells, median top 11,980 ft).
Formations in Grimes County →What basin is Grimes County in?
Petrora lists Grimes County in the Texas Gulf Coast. It is in the Railroad Commission's District 03.
The Texas Gulf Coast →Have there been earthquakes in Grimes County?
TexNet located no earthquakes of magnitude 2 or more in the area of Grimes County's permitted wells in the last 2 years.
Earthquakes in Grimes 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/grimes?days=365, documented in the API reference.