LEASES · O-2-12081 · OIL · DISTRICT 02
Yosko Borgfeld-Yosko Unit SA
Marathon Oil EF LLC · Karnes County · Eagleville (Eagle Ford-2) field
Yosko Borgfeld-Yosko Unit SA is an RRC oil lease (O-2-12081) in Karnes County operated by Marathon Oil EF LLC, with one well completed on it.
It has reported 386K barrels of oil and 703K mcf of gas since April 2021, last reporting volume in April 2026 (statewide data runs through April 2026).
It reported 22.4K barrels of oil in the 12 months through April 2026, down 22% on the year before; the lease peaked at 46.7K barrels in May 2021.
- 386K
- bbl oil, all reported
- 703K
- mcf gas incl. casinghead
- 22.4K
- bbl oil, 12 months through Apr 2026
- -22%
- vs the 12 before
- 1
- wells completed on it
- 46.7K
- peak month, bbl (May 2021)
PDQ LEASE REPORTS · FIRST APR 2021 · 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 22,421 · prior 12 28,842(-22%)
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 54,558 · prior 12 94,626(-42%)
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.
- Marathon Oil EF LLCJul 2020 → Jul 2026 · 73 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.
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