LEASES · O-2-9901 · OIL · DISTRICT 02
Holland-Opiela Unit
ReportingMarathon Oil EF LLC · Karnes County · Eagleville (Eagle Ford-2) field
Holland-Opiela Unit is an RRC oil lease (O-2-9901) in Karnes County operated by Marathon Oil EF LLC, with 6 wells completed on it.
It has reported 1.29M barrels of oil and 2.23M mcf of gas since October 2011, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 76.3K barrels of oil, down 57% on the year before; the lease peaked at 99.2K barrels in January 2021.
2 operators have filed production on it, most recently Marathon Oil EF LLC since November 2011.
- 1.29M
- bbl oil, all reported
- 2.23M
- mcf gas incl. casinghead
- 76.3K
- bbl oil, last 12 reported
- -57%
- vs the 12 before
- 6
- wells completed on it
- 99.2K
- peak month, bbl (Jan 2021)
PDQ LEASE REPORTS · FIRST OCT 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 76,298 · prior 12 176,008(-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 137,192 · prior 12 220,959(-38%)
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 CompanyOct 2011 → Oct 2011 · 1 mo
- Marathon Oil EF LLCNov 2011 → Jul 2026 · 177 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
6
wells completed on the lease
- Producing
- 6
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-2-9901, documented in the API reference.