FIELDS · 30007001 · DISTRICT 01
Fairfield
Bexar 244 · Medina 36 · Atascosa 3
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
- 192
- operators, all time
- 27.2K
- bbl oil, last 12 reported +28%
- 12
- mcf gas, last 12 reported +0%
- 91
- leases reporting volume
- 822K
- bbl oil, lifetime · 9.63K mcf
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Oil by month
TEN YEARS · EVERY LEASE IN THE FIELD
Barrels reported on Form PR across the field's leases. The latest months are revised upward as late reports arrive.
Last 12 months 27,244 · prior 12 21,312(+28%)
Gas by month
TEN YEARS · EVERY LEASE IN THE FIELD
Gas-well gas plus casinghead, mcf, across the field's leases. The latest months are revised upward as late reports arrive.
Last 12 months 12 · prior 12 12(+0%)
Leases reporting volume
How many of the field's leases reported any oil or gas each month: the field's active footprint.
Latest month 59 · a year earlier 91(-35%)
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 Oper LLC | 8 | 55.1K | 20 | Jul 2026 |
| JM Calk Oper, 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 Co | 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
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 nightly from every lease report naming the field, cut at the statewide reported-through month. Counties from the wells completed on each lease.
New to these records? how production is reported
Developers: this page as JSON is GET /v1/data/fields/tx/30007001, documented in the API reference.