Austin Chalk Formation in Texas: Operators, Permits & Activity 2026

Formation data coverage

Formation summary: Stored source refresh: 2026-09-16. This formation/play summary uses recorded well and operator counts and permit dates in the preceding 24 months at summary refresh. Operator counts do not verify current operations. Summary counts and the separately refreshed permit and DUC lists may have different coverage. This is a capped directory of stored records, not a complete statewide count. Permit list: Stored source refresh: 2026-09-17. At most 50 displayed permit records match the formation name, ordered by permit date. This operator-linked list can differ from the summary permit count; a permit is not proof of drilling or production. This is a capped directory of stored records, not a complete statewide count. DUC list: No stored records are available in this view; this does not establish zero activity. At most 30 displayed records match the formation name, ordered by spud date. A spud date with no reported first production is a DUC proxy, not verified completion status. Elapsed days are computed at source refresh. This is a capped directory of stored records, not a complete statewide count.

Formation summary source

Stored source refresh: 2026-09-16. This formation/play summary uses recorded well and operator counts and permit dates in the preceding 24 months at summary refresh. Operator counts do not verify current operations. Summary counts and the separately refreshed permit and DUC lists may have different coverage. This is a capped directory of stored records, not a complete statewide count.

Compiled from Texas Railroad Commission records through a commercial well-data aggregator. Scheduled refreshes do not guarantee that new regulator filings are available. Use the source records to check a specific well.

Permit-list source

Stored source refresh: 2026-09-17. At most 50 displayed permit records match the formation name, ordered by permit date. This operator-linked list can differ from the summary permit count; a permit is not proof of drilling or production. This is a capped directory of stored records, not a complete statewide count.

DUC-list source

No stored records are available in this view; this does not establish zero activity. At most 30 displayed records match the formation name, ordered by spud date. A spud date with no reported first production is a DUC proxy, not verified completion status. Elapsed days are computed at source refresh. This is a capped directory of stored records, not a complete statewide count.

Total Wells

94,015

Recorded Operators

6,449

Total Lateral

31,736 miles

Permits (24mo)

148

Top Operators in the Austin Chalk (Texas)

The operators with the most well counts targeting the Austin Chalk formation in Texas:

#	Operator	Wells in Austin Chalk
1	Eog Resources	3,777
2	Magnolia Oil & Gas Operating	2,070
3	Wildfire Energy Operating LLC	1,698
4	Javelin Energy	1,605
5	Marathon Oil Company	1,588
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

Primary Texas Counties for the Austin Chalk

The Texas counties with the most Austin Chalk activity:

Bexar, Caldwell, Atascosa, Guadalupe, Milam

Recent Austin Chalk Drilling Permits in Texas

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

About the Austin Chalk Formation in Texas

The Austin Chalk is a formation/play group recorded in Texas, with 94,015 wells on file across 6,449 distinct operators of record. Operators have filed 148 drilling permits targeting the Austin Chalk in the 24-month window at summary refresh. These are stored records, not a live measure of drilling.

Recorded formation activity provides regional context. It does not establish ownership, future production, royalty payments or a value for an individual tract. Consult qualified professionals about your specific interest.

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Frequently Asked Questions

How many wells target the Austin Chalk formation in Texas?

94,015 wells target the Austin Chalk in Texas, worked by 6,449 recorded operators, per TX RRC well-header records. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-09-17. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

Who are the top operators in the Austin Chalk in Texas?

By well count, the operators with the most Austin Chalk wells on record 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. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-09-17. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

How active is the Austin Chalk formation right now?

Operators filed 148 drilling permits targeting the Austin Chalk in the 24-month window at source refresh, per TX RRC records. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-09-17. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

Is there active drilling in the Austin Chalk in Texas?

Operators filed 148 new drilling permits targeting the Austin Chalk in Texas in the 24-month window at source refresh. New permits and spuds record reported activity stages; they do not establish ongoing drilling, per TX RRC records. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-09-17. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

What is the current Austin Chalk activity in Texas?

Austin Chalk activity in Texas includes 94,015 wells on record and 6,449 recorded operators, led by EOG Resources, Magnolia Oil & Gas Operating, Wildfire Energy Operating LLC, Javelin Energy and Marathon Oil Company, with 148 drilling permits filed in the 24-month window at source refresh — from Texas Railroad Commission (RRC) well-header records. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-09-17. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

Which Texas counties have the most Austin Chalk activity?

The primary counties recorded for Austin Chalk in Texas are Bexar, Caldwell, Atascosa, Guadalupe, Milam. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-09-17. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.

How do I find out what my Austin Chalk mineral rights are worth?

Value depends on your net mineral acres or royalty decimal, the operator, the remaining drilling locations, and current oil and gas prices. This page is informational only, not a valuation. Summary: Stored source refresh: 2026-09-16. Permit list: Stored source refresh: 2026-09-17. DUC list: No stored records are available in this view; this does not establish zero activity. The lists have separate coverage limits.