COUNTIES · TEXAS GULF COAST · DISTRICT 03 · CODE 185
Grimes County, Texas
1 drilling permit was issued in Grimes County in the past 90 days, none in the 90 days before.
CML Exploration, LLC filed the only permit of the past 12 months.
The county has 10 active disposal and injection permits of 26 on file, with 2.96M barrels injected in the 12 months reported through September 2025.
842 drilling permits have been issued in Grimes County since 1977.
842 permits on file since 1977 · last issued Sep 15, 2026
Email me new permitsAlso: every Grimes County well in the statewide list, searchable → · a year of permits on the map →
- 225
- active wells · 736 on file
- 20
- operators of the active wells
- 342
- plugged wells
Wells by status
736 WELLBORES ON FILE
From the RRC wellbore file and the permit record. Other sites count the RRC's map locations, which include dry holes and locations this file does not hold, so their totals differ.
Wells spudded, by year
HorizontalVertical and directional
Drilling permits
- 1
- permits issued, 90d
- —
- vs prior 90d (0)
- 1
- operators filing
- 100%
- horizontal
- 8,950
- avg permitted depth, ft
WINDOWS ON THE RRC ISSUE DATE · COMPUTED NOV 11, 2026 · WHY ISSUE AND SEEN DATES DIFFER
Permits issued by month
LAST 120 MONTHS · BY ISSUE DATE
Last 12 months 1 · prior 12 6(-83%)
Operators by permits, 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 |
Full operator directory: 184 operators have filed a permit here since 1977 →
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 →
In Grimes County the Pecan Gap is reported in 84 wells, median top 11,980 ft, highlighted below. Back to the formation →
| 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
- 2.96M
- bbl injected, last 12 reported months
- Sep 2025
- reported through
Every active well, operator, and daily reporter in Grimes County →
Permitted volume is a ceiling, not throughput. How to read it →
USGS catalog, Texas
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 |
| 909151Amendment | 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 83% from 6 in the 12 months before. 100% were for horizontal wells. The most recent was issued Sep 15, 2026. 842 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, including 225 active and 342 plugged. 358 are horizontal. The active wells are under 20 operators.
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?
3.0 million barrels of water were injected in Grimes County in the 12 months through September 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?
No earthquakes of magnitude 2 or more were located in the area of Grimes County's permitted wells in the last 2 years.
Earthquakes in Grimes County →About this data
Wells from the RRC wellbore file and the permit record. 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=90, documented in the API reference.