LEASES · O-10-43922 · OIL · DISTRICT 08
Duke 40
Oxyrock Operating, LLC · Martin County · Spraberry (Trend Area) field
Duke 40 is an RRC oil lease (O-10-43922) in Martin County operated by Oxyrock Operating, LLC, with 2 wells completed on it.
It has reported 136K barrels of oil and 529K mcf of gas since February 2013, last reporting volume in April 2026 (statewide data runs through April 2026).
It reported 2.99K barrels of oil in the 12 months through April 2026, up 2% on the year before; the lease peaked at 7.9K barrels in February 2013.
2 operators have filed production on it, most recently Oxyrock Operating, LLC since August 2024.
- 136K
- bbl oil, all reported
- 529K
- mcf gas incl. casinghead
- 2.99K
- bbl oil, 12 months through Apr 2026
- +2%
- vs the 12 before
- 2
- wells completed on it
- 7.9K
- peak month, bbl (Feb 2013)
PDQ LEASE REPORTS · FIRST FEB 2013 · 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 2,985 · prior 12 2,925(+2%)
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 2,860 · prior 12 4,118(-31%)
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, LLCJan 2013 → Jul 2024 · 139 mo
- Oxyrock Operating, LLCAug 2024 → Jul 2026 · 24 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
2
wells completed on the lease
- Plugged
- 1
- Producing
- 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.
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