LEASES · O-2-9812 · OIL · DISTRICT 02
Best-Fenner Unit
ReportingMarathon Oil EF LLC · Karnes County · Eagleville (Eagle Ford-2) field
Best-Fenner Unit is an RRC oil lease (O-2-9812) in Karnes County operated by Marathon Oil EF LLC, with 7 wells completed on it.
It has reported 584K barrels of oil and 1.43M mcf of gas since June 2011, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 11.3K barrels of oil, up 57% on the year before; the lease peaked at 64.7K barrels in July 2015.
2 operators have filed production on it, most recently Marathon Oil EF LLC since November 2011.
- 584K
- bbl oil, all reported
- 1.43M
- mcf gas incl. casinghead
- 11.3K
- bbl oil, last 12 reported
- +57%
- vs the 12 before
- 7
- wells completed on it
- 64.7K
- peak month, bbl (Jul 2015)
PDQ LEASE REPORTS · FIRST JUN 2011 · 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.
Last 12 months 11,268 · prior 12 7,165(+57%)
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.
Last 12 months 14,708 · prior 12 14,900(-1%)
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.
- Hilcorp Energy CompanyJun 2011 → Oct 2011 · 5 mo
- Marathon Oil EF LLCNov 2011 → Jul 2026 · 177 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
7
wells completed on the lease
- NO Type on File
- 4
- Producing
- 2
- Shut IN
- 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-2-9812, documented in the API reference.