LEASES · O-10-26640 · OIL · DISTRICT 08
Tom 4A
Diamondback E&P LLC · Martin County · Spraberry (Trend Area) field
Tom 4a is an RRC oil lease (O-10-26640) in Martin County operated by Diamondback E&P LLC, with one well completed on it.
It has reported 33.6K barrels of oil and 85.1K mcf of gas since the record begins in January 1993, last reporting volume in April 2026 (statewide data runs through April 2026).
It reported 512 barrels of oil in the 12 months through April 2026, down 26% on the year before; the lease peaked at 202 barrels in January 2003.
5 operators have filed production on it, most recently Diamondback E&P LLC since January 2025.
- 33.6K
- bbl oil, all reported
- 85.1K
- mcf gas incl. casinghead
- 512
- bbl oil, 12 months through Apr 2026
- -26%
- vs the 12 before
- 1
- wells completed on it
- 202
- peak month, bbl (Jan 2003)
PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH · 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 512 · prior 12 692(-26%)
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 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, with what it reported in them.
- Tamarack Petroleum Company, Inc.Jan 1993 → Nov 2007 · 179 mo18.1K bbl oil · 59.2K mcf gas
- Mariner Energy, Inc.Dec 2007 → Nov 2010 · 36 mo3.16K bbl oil · 8.96K mcf gas
- Apache CorporationDec 2010 → Sep 2022 · 142 mo9.9K bbl oil · 17K mcf gas
- Endeavor Energy Resources L.P.Oct 2022 → Dec 2024 · 27 mo1.65K bbl oil · 18 mcf gas
- Diamondback E&P LLCJan 2025 → Jul 2026 · 19 mo727 bbl oil · 0 mcf gas
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-10-26640, documented in the API reference.