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Royalty Clerk

RRC field 30007001 · District 01

Fairfield

The Fairfield field reported 27,898 barrels of oil and 12 mcf of gas in the last 12 months.

Field dossier

27,898bbl oil, last 12 months+13% vs prior year
Producing leases
94of 110 on record
Operators
24
Counties
2
Biggest operator
Premier Minerals, Inc.

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Where the field sits

fewermore

Medina County: 22 producing leasesBexar County: 72 producing leasesMedinaMedinaBexar
2 counties
Gas, last 12 months
12 mcf
Data through
Jul 2026

Five years of output in Fairfield

Oil output in the Fairfield field rose 13% over the last 12 months

25.9k bbl through Jul 2026, against 22.8k bbl a year earlier. Peak May 2025: 2,636 bbl.

Oil output in the Fairfield field rose 13% over the last 12 months25.9k bbl through Jul 2026, against 22.8k bbl a year earlier. Peak May 2025: 2,636 bbl.Oil, bbl per month01,0002,0003,000Peak 2,636 (May 25)52920222023202420252026
Oil output in the Fairfield field rose 13% over the last 12 months25.9k bbl through Jul 2026, against 22.8k bbl a year earlier. Peak May 2025: 2,636 bbl.Oil, bbl per month01,0002,0003,000Peak 2,636 (May 25)529'22'23'24'25'26

Gas output in the Fairfield field held steady over the last 12 months

12 mcf through Jul 2026, against 12 mcf a year earlier. Peak Aug 2021: 2 mcf.

Gas output in the Fairfield field held steady over the last 12 months12 mcf through Jul 2026, against 12 mcf a year earlier. Peak Aug 2021: 2 mcf.Gas, mcf per month01122Peak 2 (Aug 21)120222023202420252026
Gas output in the Fairfield field held steady over the last 12 months12 mcf through Jul 2026, against 12 mcf a year earlier. Peak Aug 2021: 2 mcf.Gas, mcf per month01122Peak 2 (Aug 21)1'22'23'24'25'26

SourceTexas Railroad Commission Production Data Query, field 30007001, through Jul 2026, file dated Sep 18, 2026.

Leases in the Fairfield field

Under each volume: change on the year before.

Showing 25 of 94, ranked by output value.

Search by lease name →

SourceTexas Railroad Commission Production Data Query.

Who operates here, and where

Operators, by oil

Premier Minerals leads

  1. Premier Minerals, Inc.1 lease9,235bbl
  2. 1859 Operating LLC8 leases3,562bbl
  3. JM Calk Operating, LLC5 leases2,647bbl
  4. Calk, Roger D.17 leases2,477bbl
  5. Mojave Resources, LLC5 leases1,255bbl
  6. Drachen Oil Company10 leases1,182bbl
  7. Calfas Oil, LLC4 leases1,117bbl
  8. Calfas Cattle & Oil, LLC3 leases1,056bbl

Counties, by oil

Medina County leads

  1. Medina County22 leases16.2kbbl
  2. Bexar County72 leases11.3kbbl

More operators

OperatorLongshot Energy LLC4OperatorAAA Oil Company1OperatorK.a. Barnes Oil & Gas Oper, LLC4OperatorCalk Oil Company3

Recent drilling permits in the Fairfield field