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	3,729
2	Magnolia Oil & Gas Operating	2,061
3	Wildfire Energy Operating LLC	1,698
4	Javelin Energy	1,605
5	Marathon Oil Company	1,589
6	Ineos USA Oil & Gas LLC	1,438
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	1,056

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 2 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
2024-06-17	Tiber 1b	`4241931806`	Shelby	Exxonmobil	11,251

About the Austin Chalk Formation in Texas

The Austin Chalk is one of Texas's active oil and gas plays, with 94,015 wells on file across 6,439 distinct operators of record. Operators have filed 154 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.