LEASES · O-10-41428 · OIL · DISTRICT 08
Uls 4-9
Sabalo II Operating, LLC · Andrews County · Spraberry (Trend Area) field
Uls 4-9 is an RRC oil lease (O-10-41428) in Andrews County operated by Sabalo II Operating, LLC, with one well completed on it.
It has reported 21.2K barrels of oil and 29.6K mcf of gas since April 2011, last reporting volume in April 2026 (statewide data runs through April 2026).
It reported 711 barrels of oil in the 12 months through April 2026, down 21% on the year before; the lease peaked at 1.05K barrels in May 2011.
4 operators have filed production on it, most recently Sabalo II Operating, LLC since October 2025.
- 21.2K
- bbl oil, all reported
- 29.6K
- mcf gas incl. casinghead
- 711
- bbl oil, 12 months through Apr 2026
- -21%
- vs the 12 before
- 1
- wells completed on it
- 1.05K
- peak month, bbl (May 2011)
PDQ LEASE REPORTS · FIRST APR 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.
12 months through Apr 2026 711 · prior 12 895(-21%)
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 309 · prior 12 155(+99%)
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, with what it reported in them.
- Devon Energy Production Co, L.P.Apr 2011 → Aug 2016 · 65 mo11.4K bbl oil · 22.5K mcf gas
- Pioneer Natural Res. USA, Inc.Sep 2016 → Jan 2017 · 5 mo625 bbl oil · 1.03K mcf gas
- Zarvona Energy LLCFeb 2017 → Sep 2025 · 104 mo8.81K bbl oil · 5.83K mcf gas
- Sabalo II Operating, LLCOct 2025 → Jul 2026 · 10 mo387 bbl oil · 234 mcf gas
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-10-41428, documented in the API reference.