LEASES · O-1-10893 · OIL · DISTRICT 01
Calk, E. W.
ReportingCalk Operating, LLC · Bexar County · Somerset field
Calk, E. W. is an RRC oil lease (O-1-10893) in Bexar County operated by Calk Operating, LLC, with 17 wells completed on it.
It has reported 33.6K barrels of oil and 19 mcf of gas since January 1993, last reporting volume in March 2026 (statewide data runs through April 2026).
The last 12 reported months total 572 barrels of oil, up 15% on the year before; the lease peaked at 330 barrels in February 2008.
5 operators have filed production on it, most recently Calk Operating, LLC since September 2015.
- 33.6K
- bbl oil, all reported
- 19
- mcf gas incl. casinghead
- 572
- bbl oil, last 12 reported
- +15%
- vs the 12 before
- 17
- wells completed on it
- 330
- peak month, bbl (Feb 2008)
PDQ LEASE REPORTS · FIRST JAN 1993 · LAST VOLUME MAR 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 572 · prior 12 499(+15%)
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.
- Alco Oil CompanyJan 1993 → Mar 1993 · 3 mo
- Calk, J. M. Operating Co.Apr 1993 → Mar 1998 · 60 mo
- Calk, Roger D.Apr 1998 → Jun 2005 · 87 mo
- Calk Oil CompanyJul 2005 → Aug 2015 · 122 mo
- Calk Operating, LLCSep 2015 → Jul 2026 · 131 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
17
wells completed on the lease
- NO Type on File
- 15
- Producing
- 2
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-1-10893, documented in the API reference.