COUNTIES · EAGLE FORD SHALE · DISTRICT 01 · CODE 507
Zavala County
Zavala County permitting is running 1.3 permits a month over the trailing 90 days (4 total, down 67% on the prior quarter). 1 was issued in the past week.
Rosewood Resources, Inc. leads with 10 permits in the past 12 months, one of 5 operators active in the county.
2 operators filed a first Zavala County permit in the past year.
Median permitted depth over the past year is 6,108 ft (prior year: 6,704 ft); 100% of the past year's permits are horizontal.
The county has 23 active disposal and injection permits, with 630K barrels injected in the 12 months reported through June 2025.
TexNet located 14 earthquakes of magnitude 2 or more in the county's permit footprint over the past two years, the largest M3.5.
3,569 drilling permits have been issued in Zavala County since 1977.
3,569 permits on file since 1977 · last issued Oct 22, 2026
Watch Zavala CountyAlso: every Zavala County well in the statewide list, searchable → · a year of permits on the map →
- 4
- permits issued, 90d
- -67%
- vs prior 90d (12)
- 2
- operators filing
- 100%
- horizontal
- 8,500
- avg permitted depth, ft
- 423
- operators, all time
WINDOWS ON THE RRC ISSUE DATE · COMPUTED OCT 29, 2026 · WHY ISSUE AND SEEN DATES DIFFER
Permits issued by month
LAST 87 MONTHS · BY ISSUE DATE
Last 12 months 39 · prior 12 49(-20%)
Top operators, last 12 months
By permits issued. Wells are the operator’s current inventory here from the RRC wellbore file.
| Operator | Permits | Wells |
|---|---|---|
| Rosewood Resources, Inc. | 10 | 8 |
| Blackbrush O & G, LLC | 6 | 10 |
| Gulftex Energy, LLC | 4 | 0 |
| CML Exploration, LLC | 3 | 77 |
| Buffco Production Inc. | 1 | 46 |
| Formentera Operations LLC | 1 | 11 |
New entrants, last 12 months
Operators whose first permit in Zavala County came in the last year. 2 in total.
- Gulftex Energy, LLC4 permitsApr 30, 2026 · active elsewhere first
- Formentera Operations LLC1 permitOct 28, 2026 · active elsewhere first
Formations in completed wells
RRC WELLBORE FILE · ≥10 WELLS
Tops reported on completion filings for wells in Zavala County. A well counts for every formation it reports, so this reads as the county's stratigraphic column. About tops →
In Zavala County the Navarro is reported in 43 wells, median top 540 ft, highlighted below. Back to the formation →
| Formation | Wells | Permitted last 3 yrs | Median top, ft | P10–P90 |
|---|---|---|---|---|
| Austin Chalk | 741 | 38 | 5,717 | 4,690–6,220 |
| Olmos | 649 | 31 | 3,842 | 1,827–4,474 |
| Anacacho | 583 | 23 | 5,293 | 4,250–5,874 |
| Escondido | 578 | 41 | 2,912 | 1,034–3,404 |
| Eagle Ford | 543 | 32 | 6,176 | 5,318–6,686 |
| San Miguel | 369 | 19 | 4,315 | 1,766–5,424 |
| Buda | 109 | 2 | 6,550 | 5,310–7,012 |
| Midway | 53 | 2 | 2,615 | 1,086–3,100 |
| Wilcox | 48 | 2 | 270 | 1–2,044 |
| Navarro | 43 | 4 | 540 | 346–2,590 |
| Georgetown | 39 | 1 | 6,755 | 5,499–7,150 |
| Carrizo | 26 | 0 | 715 | 50–1,356 |
| Del Rio | 19 | 0 | 5,850 | 5,225–6,670 |
| Taylor | 17 | 0 | 620 | 548–3,654 |
| Pearsall | 10 | 0 | 6,782 | 6,462–9,242 |
Beyond the permit record
RRC UIC permits · H-10 reported volumes
Disposal and injection
- 23
- active UIC permits of 118
- 52.1K
- permitted bbl/day, active
- 630K
- bbl injected, last 12 reported months
- Jun 2025
- reported through
Every active well, operator, and daily reporter in Zavala County →
Permitted volume is a ceiling, not throughput. How to read it →
TexNet catalog via USGS
Seismicity, last 2 years
- 14
- M2+ events in the area
- M3.5
- 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 |
|---|---|---|---|---|---|---|
| 919655 | Oct 30, 2026 | Oct 28, 2026 | Formentera Operations LLC | Dynamo #N731HPH | 11,600 | 50733584 |
| 919363 | Oct 24, 2026 | Oct 22, 2026 | Buffco Production Inc. | Hargrove a-Lackey (AW) #1HH | 13,000 | 50733582 |
| 918910 | Sep 30, 2026 | Sep 28, 2026 | Rosewood Resources, Inc. | Holdsworth C #3HH | 7,000 | 50733581 |
| 918909 | Sep 30, 2026 | Sep 28, 2026 | Rosewood Resources, Inc. | Holdsworth C #2HH | 7,000 | 50733580 |
| 918908 | Sep 30, 2026 | Sep 28, 2026 | Rosewood Resources, Inc. | Holdsworth C #1HH | 7,000 | 50733579 |
| 916476 | Jul 10, 2026 | Jul 10, 2026 | CML Exploration, LLC | Tlapek #1REH | 6,100 | 50732726 |
| 916466 | Jun 18, 2026 | Jun 18, 2026 | Rosewood Resources, Inc. | Puckett B #1HH | 6,000 | 50733578 |
| 916466 | Jun 18, 2026 | Jun 18, 2026 | Rosewood Resources, Inc. | Puckett B #1HH | 6,000 | 50733578 |
| 916464 | Jun 18, 2026 | Jun 18, 2026 | Rosewood Resources, Inc. | Puckett A #1HH | 6,000 | 50733577 |
| 916274 | Aug 20, 2026 | Jun 12, 2026 | Blackbrush O & G, LLC | Chittim Heirs #405HH | 9,800 | 50733576 |
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/zavala?days=90, documented in the API reference.