Oil and gas leases in Mcmullen County — page 14
Mcmullen County, Texas has 2,613 oil and gas leases with production on file at the Railroad Commission. 1,000 of them are oil leases and 1,613 are gas leases. Between them they carry 5,075 wellbores. Reported volumes run from January 1993 to August 2026 and come to 408.4 million barrels of oil and 1.8 billion Mcf of gas. 256 operators file returns here. Every lease below has its own page with a decline-curve forecast and an estimate of what the whole lease is worth.
Key facts about Mcmullen County
- How many oil and gas leases are in Mcmullen County?
- Mcmullen County has 2,613 oil and gas leases with production reported to the Railroad Commission of Texas, as of August 2026.
- How much oil and gas has Mcmullen County produced?
- Leases in Mcmullen County have reported 408,421,659 barrels of oil (bbl) and 1,775,962,826 thousand cubic feet of gas (Mcf) to the Railroad Commission of Texas between January 1993 and August 2026.
- How many operators are active in Mcmullen County?
- 256 operators file production returns for leases in Mcmullen County.
- How much are mineral rights in Mcmullen County worth?
- There is no single figure: what a mineral or royalty interest in Mcmullen County is worth depends on the individual lease, its decline, and the share the owner holds. Each of the 2,613 leases listed here has its own page with the full production history the operator reported, a decline-curve forecast, and an estimate of what a royalty interest in it is worth today.
Leases — page 14 of 14
- SAN MIGUEL NO. 1 — oil, Welhausen Operating Company, LP, Mcmullen County, 159 reported
- NINE-ROOS — oil, Stinger Oil & Gas Inc., Mcmullen County, 157 reported
- WILLIAMS, GRANT H. -A- — gas, Xto Energy Inc., Mcmullen County, 100 reported
- ROARK — oil, York & Price Petroleum Corp., Mcmullen County, 100 reported
- SBR — gas, Swift Energy Company, Mcmullen County, 91 reported
- MARSHALL — oil, Tidal Petroleum, Inc., Mcmullen County, 52 reported
- HAGIST RANCH UNIT NO. 1 — gas, Premium Exploration Company, Mcmullen County, 45 reported
- SOUTH TEXAS SYNDICATE — gas, Buffalo Oil Corp., Mcmullen County, 35 reported
- DILWORTH, J. C. — oil, Roma Oil And Gas, Inc., Mcmullen County, 20 reported
- LINDHOLM-HANSON GU — gas, U.S. Enercorp, Ltd., Mcmullen County, 15 reported
- EDRINGTON, H. C. EST. -I- — gas, Simray Oil & Gas, Inc., Mcmullen County, 2 reported
- BILLINGS, A. — gas, Xto Energy Inc., Mcmullen County, 2 reported
- SO. TEXAS SYNDICATE -A- — oil, Buffalo Oil Corp., Mcmullen County, 1 reported
Production figures are as reported to the Railroad Commission of Texas. Values shown on lease pages are estimates produced by fitting a decline curve to that reported history; they are not offers or appraisals.