LEASES · O-11-18666 · OIL · DISTRICT 8A
Cotton "A"
ReportingShidler, Mark L., Inc. · Terry County · Wellman (Fusselman) field
Cotton "A" is an RRC oil lease (O-11-18666) in Terry County operated by Shidler, Mark L., Inc., with one well completed on it.
It has reported 276K barrels of oil and 1.12K mcf of gas since January 1993, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 10.1K barrels of oil, up 80% on the year before; the lease peaked at 1.32K barrels in May 2025.
4 operators have filed production on it, most recently Shidler, Mark L., Inc. since April 2004.
- 276K
- bbl oil, all reported
- 1.12K
- mcf gas incl. casinghead
- 10.1K
- bbl oil, last 12 reported
- +80%
- vs the 12 before
- 1
- wells completed on it
- 1.32K
- peak month, bbl (May 2025)
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 10,088 · prior 12 5,613(+80%)
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 12 · prior 12 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.
- OXY USA Inc.Jan 1993 → Feb 1998 · 62 mo
- Cross Timbers Operating CompanyMar 1998 → Sep 2000 · 31 mo
- Reef Exploration, Inc. (A-1)Oct 2000 → Mar 2004 · 42 mo
- Shidler, Mark L., Inc.Apr 2004 → Jul 2026 · 268 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
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-11-18666, documented in the API reference.