Quick answer: Valor's Bexar County, Texas rankings show the 17 operators producing the most oil and gas here — South Sam Operating Company leads — from Texas Railroad Commission filings over the last six months. If you own minerals in Bexar 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 17 oil and gas operators in Bexar County, Texas, ranked by monthly oil production. Combined output of all 25 reporting operators: 239,018 BBL oil and 10,596 Mcf gas across 152 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: 8 vs 1). Each input is capped at ±100%.
Benchmark gross value of production: about $1.4M per month — 16,089 bbl of oil and 40,482 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 |
|---|---|---|---|---|
| 2 | South Sam Operating Company | 42,789 | 0 | 4 |
| 3 | Red Chalk Resources | 17,913 | 0 | 4 |
| 4 | Koko Skadi LLC | 12,421 | 0 | 27 |
| 5 | Seeker Oil Company Incorporated | 6,988 | 0 | 14 |
| 7 | Calk Roger D | 5,273 | 0 | 17 |
| 8 | Old Chief Oil, LLC | 4,999 | 0 | 3 |
| 9 | Calfas Oil LLC | 4,461 | 0 | 9 |
| 11 | Mojave Resources LLC | 3,747 | 0 | 10 |
| 12 | Production Resources | 3,237 | 0 | 3 |
| 14 | Drachen Oil Company | 3,189 | 0 | 16 |
| 15 | Jm Calk Operating LLC | 2,160 | 0 | 5 |
| 16 | Petro Lions | 1,933 | 0 | 7 |
| 17 | Downing Well Service, Inc | 1,900 | 0 | 3 |
| 19 | Calk Oil Company | 1,519 | 0 | 7 |
| 20 | Aaronmark Services LLC | 1,331 | 0 | 3 |
| 21 | Texas Secondary Oil | 810 | 0 | 6 |
| 23 | Brander Sam H | 765 | 0 | 4 |
| — | 8 other operators (fewer than 3 producing wells/leases each) | 123,583 | 10,596 | 10 |
The largest oil and gas operators in Bexar County by reported production are South Sam Operating Company, Red Chalk Resources, and Koko Skadi LLC. In total, 25 operators reported 239,018 BBL of oil and 10,596 Mcf of gas across 152 wells and leases over the last six months. If you own minerals in Bexar 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 Bexar County records and your division orders. Valor's mineral management verifies which operators cover your Bexar County tracts and reconciles every royalty check to the right well.
Yes — 25 operators reported active production in Bexar County over the last six months, led by South Sam Operating Company. Activity shifts as operators drill, complete, and sell interests; Valor monitors production and permits so Bexar County owners can see changes near their tracts.
Operators pay Bexar 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 Bexar 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 Bexar County. Valor manages minerals; it never buys them.
Page last reviewed: July 2026. Rankings are refreshed monthly from Texas Railroad Commission filings.