LEASES · O-1-15600 · OIL · DISTRICT 01
Stewart-Giese Unit
ReportingMarathon Oil EF LLC · Atascosa County · Eagleville (Eagle Ford-1) field
Stewart-Giese Unit is an RRC oil lease (O-1-15600) in Atascosa County operated by Marathon Oil EF LLC, with one well completed on it.
It has reported 106K barrels of oil and 140K mcf of gas since November 2011, last reporting volume in August 2025 (statewide data runs through April 2026).
It reported 388 barrels of oil in the 12 months through April 2026, down 86% on the year before; the lease peaked at 6.16K barrels in January 2012.
2 operators have filed production on it, most recently Marathon Oil EF LLC since November 2011.
- 106K
- bbl oil, all reported
- 140K
- mcf gas incl. casinghead
- 388
- bbl oil, 12 months through Apr 2026
- -86%
- vs the 12 before
- 1
- wells completed on it
- 6.16K
- peak month, bbl (Jan 2012)
PDQ LEASE REPORTS · FIRST NOV 2011 · LAST VOLUME AUG 2025 · 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 388 · prior 12 2,745(-86%)
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 130 · prior 12 1,982(-93%)
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 CompanySep 2011 → Oct 2011 · 2 mo
- Marathon Oil EF LLCNov 2011 → Jul 2026 · 177 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.
Developers: this page as JSON is GET /v1/data/leases/tx/o-1-15600, documented in the API reference.