LEASES · O-10-50085 · OIL · DISTRICT 08
Willis 40A
Oxyrock Operating, LLC · Midland County · Spraberry (Trend Area) field
Willis 40a is an RRC oil lease (O-10-50085) in Midland County operated by Oxyrock Operating, LLC, with one well completed on it.
It has reported 85.7K barrels of oil and 366K mcf of gas since November 2017, last reporting volume in April 2026 (statewide data runs through April 2026).
It reported 6.13K barrels of oil in the 12 months through April 2026, down 15% on the year before; the lease peaked at 4.95K barrels in December 2017.
2 operators have filed production on it, most recently Oxyrock Operating, LLC since August 2024.
- 85.7K
- bbl oil, all reported
- 366K
- mcf gas incl. casinghead
- 6.13K
- bbl oil, 12 months through Apr 2026
- -15%
- vs the 12 before
- 1
- wells completed on it
- 4.95K
- peak month, bbl (Dec 2017)
PDQ LEASE REPORTS · FIRST NOV 2017 · 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 6,126 · prior 12 7,200(-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.
12 months through Apr 2026 18,987 · prior 12 22,921(-17%)
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.
- Crownquest Operating, LLCNov 2017 → Jul 2024 · 81 mo
- Oxyrock Operating, LLCAug 2024 → Jul 2026 · 24 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-10-50085, documented in the API reference.