LEASES · O-1-11563 · OIL · DISTRICT 01
Spears
ReportingCalfas Cattle & Oil, LLC · Bexar County · Somerset field
Spears is an RRC oil lease (O-1-11563) in Bexar County operated by Calfas Cattle & Oil, LLC, with 5 wells completed on it.
It has reported 8.71K barrels of oil and 25 mcf of gas since January 1993, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 203 barrels of oil, up 7% on the year before; the lease peaked at 193 barrels in September 2009.
7 operators have filed production on it, most recently Calfas Cattle & Oil, LLC since January 2023.
- 8.71K
- bbl oil, all reported
- 25
- mcf gas incl. casinghead
- 203
- bbl oil, last 12 reported
- +7%
- vs the 12 before
- 5
- wells completed on it
- 193
- peak month, bbl (Sep 2009)
PDQ LEASE REPORTS · FIRST JAN 1993 · LAST VOLUME APR 2026 · STATEWIDE DATA THROUGH APR 2026
Oil by month
Barrels reported on Form PR for the whole lease. The latest months are revised upward as late reports arrive.
Last 12 months 203 · prior 12 189(+7%)
Gas by month
Gas-well gas plus casinghead gas, mcf. On an oil lease all gas is reported as casinghead. The latest months are revised upward as late reports arrive.
Last 12 months 0 · prior 12 0
Decline curve
None shown. Petrora fits an Arps curve only when the last ten years of oil reports follow one decline closely enough to project (R² of 0.7 or better over at least a year since the peak). This lease's recent history does not, so a projection would be a guess dressed as a number.
Who reported it
Each run of months one operator filed the production report, oldest first.
- Cap Operating Inc.Jan 1993 → Oct 1993 · 10 mo
- Ginco Operating Co.Nov 1993 → Nov 1993 · 1 mo
- American Eagle Resources, Inc.Dec 1993 → Apr 1994 · 5 mo
- Ginco Operating Co.May 1994 → Apr 1996 · 24 mo
- More Texas OilMay 1996 → Nov 2008 · 151 mo
- Civron Petroleum Res., LLCDec 2008 → Dec 2022 · 169 mo
- Calfas Cattle & Oil, LLCJan 2023 → Jul 2026 · 43 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
5
wells completed on the lease
- Producing
- 4
- Plugged
- 1
Operates them now
About this data
Monthly oil, gas, and casinghead from the RRC PDQ production dump, which lags the reporting month by two to three months; figures shown through Apr 2026. Wells from completion reports; operator runs from who filed each month's report.
Developers: this page as JSON is GET /v1/data/leases/tx/o-1-11563, documented in the API reference.