LEASES · O-10-40779 · OIL · DISTRICT 08
Cox "11A"
Ovintiv USA Inc. · Martin County · Spraberry (Trend Area) field
Cox "11a" is an RRC oil lease (O-10-40779) in Martin County operated by Ovintiv USA Inc., with one well completed on it.
It has reported 18.7K barrels of oil and 11.9K mcf of gas since December 2010, last reporting volume in August 2025 (statewide data runs through April 2026).
It reported 46 barrels of oil in the 12 months through April 2026, down 75% on the year before; the lease peaked at 980 barrels in January 2011.
4 operators have filed production on it, most recently Ovintiv USA Inc. since June 2023.
- 18.7K
- bbl oil, all reported
- 11.9K
- mcf gas incl. casinghead
- 46
- bbl oil, 12 months through Apr 2026
- -75%
- vs the 12 before
- 1
- wells completed on it
- 980
- peak month, bbl (Jan 2011)
PDQ LEASE REPORTS · FIRST DEC 2010 · LAST VOLUME AUG 2025 · 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 46 · prior 12 186(-75%)
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 0 · prior 12 1(-100%)
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.
- Parsley Energy Operations, LLCDec 2010 → Oct 2015 · 59 mo
- EXL Petroleum Operating Inc.Nov 2015 → Jan 2019 · 39 mo
- Black Swan Operating, LLCFeb 2019 → May 2023 · 52 mo
- Ovintiv USA Inc.Jun 2023 → Jul 2026 · 38 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-10-40779, documented in the API reference.