LEASES · O-1-18771 · OIL · DISTRICT 01
LLM Zav South
ReportingIneos USA Oil & Gas LLC · Zavala County · Briscoe Ranch (Eagleford) field
Llm Zav South is an RRC oil lease (O-1-18771) in Zavala County operated by Ineos USA Oil & Gas LLC, with 3 wells completed on it.
It has reported 466K barrels of oil and 348K mcf of gas since February 2015, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 13.3K barrels of oil, down 27% on the year before; the lease peaked at 25.5K barrels in March 2015.
2 operators have filed production on it, most recently Ineos USA Oil & Gas LLC since April 2023.
- 466K
- bbl oil, all reported
- 348K
- mcf gas incl. casinghead
- 13.3K
- bbl oil, last 12 reported
- -27%
- vs the 12 before
- 3
- wells completed on it
- 25.5K
- peak month, bbl (Mar 2015)
PDQ LEASE REPORTS · FIRST FEB 2015 · 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 13,312 · prior 12 18,284(-27%)
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 25,375 · prior 12 25,102(+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.
- Chesapeake Operating, L.L.C.Feb 2015 → Mar 2023 · 98 mo
- Ineos USA Oil & Gas LLCApr 2023 → Jul 2026 · 40 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
3
wells completed on the lease
- 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.
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