94,015 wells across 6,447 active operators, with 146 drilling permits filed in the last 24 months.
Refreshed monthly from TX RRC well-header records. Data current as of 2026-08-02.
Quick answer: The Austin Chalk formation in Texas has 94,015 wells on record across 6,447 active operators, with 146 drilling permits filed in the last 24 months (as of 2026-08-02). Its most active operators by well count are Eog Resources, Magnolia Oil & Gas Operating, Wildfire Energy Operating LLC, Javelin Energy and Marathon Oil Company. Compiled from Texas Railroad Commission (RRC) well-header records, refreshed monthly.
The operators with the most well counts targeting the Austin Chalk formation in Texas:
| # | Operator | Wells in Austin Chalk |
|---|---|---|
| 1 | Eog Resources | 3,788 |
| 2 | Magnolia Oil & Gas Operating | 2,070 |
| 3 | Wildfire Energy Operating LLC | 1,698 |
| 4 | Javelin Energy | 1,605 |
| 5 | Marathon Oil Company | 1,589 |
| 6 | Ineos USA Oil & Gas LLC | 1,440 |
| 7 | Burlington Resources Oil & Gas Company | 1,435 |
| 8 | Great Plains Resources | 1,313 |
| 9 | Texas Petroleum Investment Company | 1,245 |
| 10 | Devon Energy Production Company | 1,055 |
The Texas counties with the most Austin Chalk activity:
Bexar, Caldwell, Atascosa, Guadalupe, Milam
The most recent 1 drilling permits filed for Austin Chalk wells in Texas:
| Permit Date | Well | API | County | Operator | Lateral (ft) |
|---|---|---|---|---|---|
| 2025-12-15 | Erd Unit 6 | 4202938335 |
Bexar | Jm Calk Operating LLC | 127 |
The Austin Chalk is one of Texas's active oil and gas plays, with 94,015 wells on file across 6,447 distinct operators of record. Operators have filed 146 drilling permits targeting the Austin Chalk in the last 24 months — a measure of how active the play is right now versus its historical baseline.
For mineral owners with interests in Bexar, Caldwell, Atascosa, Guadalupe, Milam, knowing whether your tract sits within an active Austin Chalk footprint is a foundational valuation question. Active formations with consistent permit flow command premium pricing; legacy formations with steady but declining production are valued differently.
See all Texas oil & gas formations & plays · Download the Texas formations dataset (CSV)
94,015 wells target the Austin Chalk in Texas, worked by 6,447 active operators, per TX RRC well-header records (as of 2026-08-02).
By well count, the most active Austin Chalk operators in Texas are Eog Resources, Magnolia Oil & Gas Operating, Wildfire Energy Operating LLC, Javelin Energy and Marathon Oil Company. The full ranking is in the table on this page.
Operators filed 146 drilling permits targeting the Austin Chalk in the last 24 months — a live measure of current activity, per TX RRC records.
Operators filed 146 new drilling permits targeting the Austin Chalk in Texas over the last 24 months. New permits and spuds are the clearest signal of active Austin Chalk drilling, per TX RRC records (as of 2026-08-02).
Austin Chalk activity in Texas currently spans 94,015 wells on record and 6,447 active operators, led by Eog Resources, Magnolia Oil & Gas Operating, Wildfire Energy Operating LLC, Javelin Energy and Marathon Oil Company, with 146 drilling permits filed in the last 24 months — refreshed monthly from Texas Railroad Commission (RRC) well-header records (as of 2026-08-02).
The most active Austin Chalk counties in Texas are Bexar, Caldwell, Atascosa, Guadalupe, Milam.
Value depends on your net mineral acres or royalty decimal, the operator, the remaining drilling locations, and current oil and gas prices. Buckhead Energy checks your tract against current Austin Chalk well and permit data and puts a free, no-obligation written offer in writing — this page is informational only, not a valuation.
Cite this dataset
Permanently archived and citable via a DOI on Zenodo (CERN), under a CC BY 4.0 license. DOI: 10.5281/zenodo.21442884 · View on Zenodo
License & attribution: This data is licensed CC BY 4.0. You are free to share and adapt it, including commercially, provided you credit “Buckhead Energy” and link back to this page or the DOI above.
Get a free written offer based on your specific tract, operator, and the current Austin Chalk activity in your area.
Get Your Free Mineral ValuationTexas Oil & Gas Industry Snapshot Dashboard
Top Texas Operators Leaderboard
Recent Drilling Permits in Texas
Recently Spudded Wells in Texas (90 days)
Newly Producing Wells in Texas (6 months)
Texas DUC Inventory (Drilled, Uncompleted)
Texas County Drilling Activity Rankings
Oklahoma Industry Snapshot (sibling state)
Largest US Operators — National Leaderboard
Browse the Full Operator Directory
Live Oil & Gas Prices (WTI + Henry Hub)
Sell Your Texas Mineral Rights
Formation: Austin Chalk
State: Texas
Total wells: 94,015
Active operators: 6,447
Permits 24mo: 146
Last refresh: 2026-08-02