FIELDS · TEXAS · FIELD 30007001
Fairfield
Field · District 01 · Bexar County and 2 more
Fairfield is an RRC field with 359 leases on file reported by 192 operators, mostly in Bexar County.
In the 12 months reported through April 2026 it produced 27,244 barrels of oil, up 28% on the year before, from 91 leases reporting volume.
Calk, Roger D. holds the most, 25 leases and 152,160 barrels lifetime.
Lifetime, the field has reported 821,560 barrels of oil and 9,630 mcf of gas, across 347 oil and 12 gas leases.
- 359
- leases on file · 347 oil, 12 gas
- 91
- leases reporting volume
- 192
- operators, all time
- 433
- active wellbores of 1,442 · 23 operators today
- 27,244
- bbl oil, 12 months through Apr 2026 · +28%
- 12
- Mcf gas, same 12 months · +0%
- 821,560
- bbl oil, lifetime · 9,630 Mcf gas
Every well completed in it, searchable →
Reported production by month
Last 12 months 27,244 · prior 12 21,312(+28%)
Fairfield: Oil by month.
Operators
BY LIFETIME OIL ON THEIR LEASES · TOP 20
| Operator | Leases | Oil, bbl | Gas, Mcf | Last reported |
|---|---|---|---|---|
| Calk, Roger D. | 25 | 152K | 801 | Jul 2026 |
| Calfas Oil, LLC | 4 | 71.7K | 83 | Jul 2026 |
| 1859 Operating LLC | 8 | 55.1K | 20 | Jul 2026 |
| JM Calk Operating, LLC | 6 | 48.6K | 5 | Jul 2026 |
| Drachen Oil Company | 12 | 46.5K | 495 | Jul 2026 |
| Red Chalk Resources LLC | 1 | 39.6K | 22 | Jul 2026 |
| Mojave Resources, LLC | 5 | 39.1K | 207 | Jul 2026 |
| Calk Oil Company | 3 | 32K | 56 | Jul 2026 |
| Simco Oil, LLC | 7 | 31.7K | 331 | Jul 2026 |
| K.A. Barnes Oil & Gas Oper, LLC | 4 | 26K | 80 | Jul 2026 |
| Cactus Gas & Oil, Inc. | 5 | 24.6K | 619 | Mar 2008 |
| Hardwick, Ross H. Oil Company | 15 | 20K | 247 | Jul 2026 |
| Petro Lions, LLC | 5 | 19.8K | 43 | Jul 2026 |
| Gonzalez, Eugene Jr | 4 | 17.7K | 77 | Jul 2026 |
| Haggard Operating Group/Oil | 5 | 15.3K | 1.38K | Jul 2026 |
| Grothues, G B Oil | 2 | 13K | 282 | Jul 2026 |
| Longshot Energy LLC | 4 | 12.9K | 36 | Jul 2026 |
| Aaa Oil Company | 1 | 12.8K | 304 | Jul 2026 |
| Salas-Apache Oil LLC | 1 | 12.3K | 20 | Jul 2026 |
| Calfas Cattle & Oil, LLC | 3 | 11.6K | 50 | Jul 2026 |
Counties
- Bexar County → 244 leases
- Medina County → 36 leases
- Atascosa County → 3 leases
Latest completions
BY COMPLETION DATE
| Well | Operator | County | Completed | Top perf, ft | Oil, 12 mo | Gas, 12 mo |
|---|---|---|---|---|---|---|
| Ralph & Sons Farms Inc. #5 | Premier Minerals Inc. | Medina | Jul 9, 2025 | — | 0 | 0 |
| Ralph & Sons Farms Inc. #1 | Premier Minerals Inc. | Medina | Jul 9, 2025 | — | 0 | 0 |
| Ralph & Sons Farms Inc. #11 | Premier Minerals Inc. | Medina | Jul 8, 2025 | — | 0 | 0 |
| Ralph & Sons Farms Inc. #10 | Premier Minerals Inc. | Medina | Jul 8, 2025 | — | 0 | 0 |
| Ralph & Sons Farms Inc. #4 | Premier Minerals Inc. | Medina | Jul 8, 2025 | — | 0 | 0 |
| Ralph & Sons Farms Inc. #9 | Premier Minerals Inc. | Medina | Apr 3, 2025 | — | 0 | 0 |
| Ralph & Sons Farms Inc. #8 | Premier Minerals Inc. | Medina | Apr 1, 2025 | — | 0 | 0 |
| Ralph & Sons Farms Inc. #3 | Premier Minerals Inc. | Medina | Mar 20, 2025 | — | 0 | 0 |
| Ralph & Sons Farms Inc. #2 | Premier Minerals Inc. | Medina | Mar 18, 2025 | — | 0 | 0 |
| Keller 9 #5 | 1859 Operating LLC | Medina | Jul 15, 2024 | — | 0 | 0 |
About this data
Field 30007001 from RRC PDQ lease reports: lifetime totals and lease and operator counts from the field summary; the monthly series summed from every lease report naming the field, cut at the statewide reported-through month, Apr 2026. Counties from the wells completed on each lease. Completions are the wellbores the RRC schedule ties to the field. Nothing is estimated.
Developers: this page as JSON is GET /v1/data/fields/tx/30007001, documented in the API reference.