LEASES · O-2-12010 · OIL · DISTRICT 02
Mammoth A
ReportingFW Eagle Ford I, LLC · Lavaca County · Eagleville (Eagle Ford-2) field
Mammoth A is an RRC oil lease (O-2-12010) in Lavaca County operated by FW Eagle Ford I, LLC, with one well completed on it.
It has reported 195K barrels of oil and 264K mcf of gas since June 2020, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 12K barrels of oil, down 19% on the year before; the lease peaked at 15.8K barrels in July 2020.
4 operators have filed production on it, most recently FW Eagle Ford I, LLC since January 2026.
- 195K
- bbl oil, all reported
- 264K
- mcf gas incl. casinghead
- 12K
- bbl oil, last 12 reported
- -19%
- vs the 12 before
- 1
- wells completed on it
- 15.8K
- peak month, bbl (Jul 2020)
PDQ LEASE REPORTS · FIRST JUN 2020 · 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 12,008 · prior 12 14,866(-19%)
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 12,337 · prior 12 27,390(-55%)
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.
- Penn Virginia Oil & Gas, L.P.Jun 2020 → Nov 2022 · 30 mo
- Rocc Oil & Gas, L.P.Dec 2022 → Dec 2023 · 13 mo
- Baytex Energy USA, Inc.Jan 2024 → Dec 2025 · 24 mo
- FW Eagle Ford I, LLCJan 2026 → Jul 2026 · 7 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-2-12010, documented in the API reference.