Quick answer: Valor's Atascosa County, Texas rankings show the 21 operators producing the most oil and gas here — Marathon Oil Company leads — from Texas Railroad Commission filings over the last six months. If you own minerals in Atascosa County, these operators are your likely check-writers. Valor verifies the operator on your tract, audits every royalty check, and recovers suspended funds. Valor manages minerals; it never buys them.
The top 21 oil and gas operators in Atascosa County, Texas, ranked by monthly oil production. Combined output of all 25 reporting operators: 115,637,770 BBL oil and 99,934,527 Mcf gas across 790 reporting wells/leases.
Momentum blends the year-over-year change in average monthly production (oil + gas at 6 Mcf per BOE, 2025-11 – 2026-05 vs the same months a year earlier, complete reporting months only) with the change in drilling permits (last 12 months vs the prior 12: 67 vs 81). Each input is capped at ±100%.
Benchmark gross value of production: about $162.5M per month — 2,099,668 bbl of oil and 2,112,053 Mcf of gas a month, priced at the EIA average WTI ($73.03/bbl) and Henry Hub ($4.20/MMBtu) spot prices over the same months.
Benchmark prices before quality and location differentials, transport, taxes and costs; this is a county-level economic indicator, not the value of any mineral or royalty interest.
Source: Valor analysis of public oil and gas data. Statistics are published on this page; no bulk download is offered.
| Rank | Operator | Oil (BBL) | Gas (Mcf) | Wells |
|---|---|---|---|---|
| 1 | Marathon Oil Company | 94,040,176 | 77,605,486 | 109 |
| 2 | Eog Resources | 11,384,047 | 8,302,291 | 258 |
| 3 | Javelin Energy | 3,980,186 | 6,161,997 | 64 |
| 4 | Xto Energy | 2,910,813 | 5,318,777 | 53 |
| 5 | Crescent Energy Operating, LLC | 698,614 | 342,114 | 19 |
| 6 | Valence Operating Company | 519,401 | 271,244 | 7 |
| 8 | Verdun Oil & Gas | 307,425 | 386,243 | 12 |
| 9 | Texas American Resources Company | 284,678 | 376,458 | 32 |
| 10 | Murphy Exploration & Production Company | 257,776 | 349,573 | 75 |
| 11 | Trailblazer Energy Resources LLC | 245,811 | 295,962 | 62 |
| 12 | Wenbe | 205,734 | 0 | 11 |
| 13 | Trinity Operating Usg | 73,074 | 36,347 | 12 |
| 15 | Guinn Operating Company | 39,017 | 0 | 4 |
| 16 | Mazco Energy | 34,378 | 536 | 12 |
| 17 | J P Oil Company | 26,648 | 28,083 | 5 |
| 19 | Alvarado 2014 | 15,995 | 4,171 | 4 |
| 20 | Atlas Operating | 13,814 | 0 | 11 |
| 21 | Dorchester Operating Company LLC | 13,684 | 0 | 3 |
| 22 | Rickaway Energy | 13,335 | 4,868 | 7 |
| 23 | Brymer Contracting Incorporated | 10,290 | 0 | 19 |
| 24 | Britanco | 8,521 | 302 | 6 |
| — | 4 other operators (fewer than 3 producing wells/leases each) | 554,353 | 450,075 | 5 |
The largest oil and gas operators in Atascosa County by reported production are Marathon Oil Company, Eog Resources, and Javelin Energy. In total, 25 operators reported 115,637,770 BBL of oil and 99,934,527 Mcf of gas across 790 wells and leases over the last six months. If you own minerals in Atascosa County, these operators are your likely check-writers — Valor tracks production and royalties by tract so you know who owes you.
Start with the operator rankings on this page, then confirm the exact well and operator on your tract through the Atascosa County records and your division orders. Valor's mineral management verifies which operators cover your Atascosa County tracts and reconciles every royalty check to the right well.
Yes — 25 operators reported active production in Atascosa County over the last six months, led by Marathon Oil Company. Activity shifts as operators drill, complete, and sell interests; Valor monitors production and permits so Atascosa County owners can see changes near their tracts.
Operators pay Atascosa County mineral owners a royalty on production, based on a decimal interest set out on a division order. Missed or suspended checks are common after a move, a death, or a title gap. Valor audits Atascosa County royalty statements, recovers suspended funds, and manages the interest so owners are paid correctly.
Valor manages minerals for owners — confirming which of the operators above cover your tracts, auditing every royalty check, recovering suspended and unclaimed funds, and giving you one clear, tax-ready view of what you own in Atascosa County. Valor manages minerals; it never buys them.
Organize my royalties Inherited minerals in Atascosa County →
Page last reviewed: July 2026. Rankings are refreshed monthly from Texas Railroad Commission filings.