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COUNTIES · EAGLE FORD SHALE · DISTRICT 01 · CODE 163

Frio County

Frio County permitting is running 5.7 permits a month over the trailing 90 days (17 total, down 37% on the prior quarter).

Formentera Operations LLC leads with 43 permits in the past 12 months, one of 7 operators active in the county.

One operator filed a first Frio County permit in the past year.

Median permitted depth over the past year is 10,500 ft (prior year: 9,000 ft); 78% of the past year's permits are horizontal.

The county has 147 active disposal and injection permits, with 14.6M barrels injected in the 12 months reported through June 2025.

TexNet located 412 earthquakes of magnitude 2 or more in the county's permit footprint over the past two years, the largest M3.6.

4,312 drilling permits have been issued in Frio County since 1977.

4,312 permits on file since 1977 · last issued Oct 16, 2026

Watch Frio County

Also: every Frio County well in the statewide list, searchable → · a year of permits on the map →

Window30 days90 days180 days365 days
17
permits issued, 90d
-37%
vs prior 90d (27)
4
operators filing
82%
horizontal
9,362
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 90 MONTHS · BY ISSUE DATE

Last 12 months 91 · prior 12 56(+63%)

020402017201820192020202120222023202420252026

Top operators, last 12 months

By permits issued. Wells are the operator’s current inventory here from the RRC wellbore file.

OperatorPermitsWells
Formentera Operations LLC4364
Rosewood Resources, Inc.1135
Central Gulf Petroleum Inc104
Texas American Resources Company815
Arete Operating Company, LLC32
EOG Resources, Inc.12
MB Energy, LLC10

Full operator directory →

New entrants, last 12 months

Operators whose first permit in Frio County came in the last year. 1 in total.

Permit types, 90d

TypeWindowPriorAll time
Drill17273,553

What the types mean →

Formations in completed wells

RRC WELLBORE FILE · ≥10 WELLS

Tops reported on completion filings for wells in Frio 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 Frio County report the Edwards, so it is below this table's cutoff. Back to the formation →

FormationWellsPermitted last 3 yrsMedian top, ftP10–P90
Austin Chalk1,354626,3965,334–7,557
Olmos1,009654,4783,125–6,021
Anacacho956595,9604,884–7,191
Eagle Ford730587,0425,810–8,258
Escondido588613,7242,998–5,014
Navarro387383,6762,678–5,122
Queen City30821,362942–2,191
San Miguel277175,1374,330–5,803
Buda245226,8705,800–8,098
Wilcox132122,9301,204–3,888
Midway128173,1242,414–3,704
Carrizo8621,540608–2,275
Georgetown51196,6025,812–7,850
Pearsall41179,4515,380–11,400
Del Rio27106,7775,888–7,775

Beyond the permit record

RRC UIC permits · H-10 reported volumes

Disposal and injection

147
active UIC permits of 554
452K
permitted bbl/day, active
14.6M
bbl injected, last 12 reported months
Jun 2025
reported through

Every active well, operator, and daily reporter in Frio County →

Permitted volume is a ceiling, not throughput. How to read it →

TexNet catalog via USGS

Seismicity, last 2 years

412
M2+ events in the area
M3.6
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

PermitSeenIssuedOperatorLease / wellDepthAPI
919270Oct 18, 2026Oct 16, 2026Central Gulf Petroleum IncCohn #1A3,85016334448
919097Oct 9, 2026Oct 7, 2026Texas American Resources CompanyMojosa Ranch #706HH11,00016334447
919096Oct 9, 2026Oct 7, 2026Texas American Resources CompanyMojosa Ranch #705HH11,00016334446
918813Sep 25, 2026Sep 23, 2026Formentera Operations LLCRocky-Unit #S734HH10,00016334445
918812Sep 25, 2026Sep 23, 2026Formentera Operations LLCRocky-Unit #S732HH10,00016334444
918811Sep 25, 2026Sep 23, 2026Formentera Operations LLCRocky-Unit #S730HH10,00016334443
918467Sep 13, 2026Sep 11, 2026Formentera Operations LLCNero-Unit-B #S733HH10,50016334442
918457Sep 12, 2026Sep 10, 2026MB Energy, LLCNeal #24,30016334441
917940Sep 23, 2026Aug 19, 2026Formentera Operations LLCNext in Line-Unit #N734HH10,50016334438
917939Sep 23, 2026Aug 19, 2026Formentera Operations LLCNext in Line-Unit #N731HH10,00016334437

All Frio County permits →

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/frio?days=90, documented in the API reference.