LEASES · O-11-66961 · OIL · DISTRICT 8A
Masten "C"
Extex Operating Company · Cochran County · Levelland field
Masten "C" is an RRC oil lease (O-11-66961) in Cochran County operated by Extex Operating Company, with 18 wells completed on it.
It has reported 438K barrels of oil and 579K mcf of gas since February 1993, last reporting volume in April 2026 (statewide data runs through April 2026).
It reported 1.52K barrels of oil in the 12 months through April 2026, down 22% on the year before; the lease peaked at 3.85K barrels in June 1997.
3 operators have filed production on it, most recently Extex Operating Company since January 2023.
- 438K
- bbl oil, all reported
- 579K
- mcf gas incl. casinghead
- 1.52K
- bbl oil, 12 months through Apr 2026
- -22%
- vs the 12 before
- 18
- wells completed on it
- 3.85K
- peak month, bbl (Jun 1997)
PDQ LEASE REPORTS · FIRST FEB 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.
12 months through Apr 2026 1,524 · prior 12 1,945(-22%)
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.
12 months through Apr 2026 521 · prior 12 331(+57%)
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.
- Parker & Parsley, Wpi AgentFeb 1993 → Oct 1997 · 57 mo
- Walsh Petroleum, Inc.Nov 1997 → Dec 2022 · 302 mo
- Extex Operating CompanyJan 2023 → Jul 2026 · 43 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
18
wells completed on the lease
- Plugged
- 7
- Producing
- 5
- Shut In
- 5
- Injection
- 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-11-66961, documented in the API reference.