LEASES · O-10-39688 · OIL · DISTRICT 08
Glass Ranch
ReportingCOG Operating LLC · Martin County · Spraberry (Trend Area) field
Glass Ranch is an RRC oil lease (O-10-39688) in Martin County operated by Cog Operating LLC, with 6 wells completed on it.
It has reported 612K barrels of oil and 1.25M mcf of gas since September 2009, last reporting volume in April 2026 (statewide data runs through April 2026).
It reported 21.1K barrels of oil in the 12 months through April 2026, down 2% on the year before; the lease peaked at 11.7K barrels in November 2010.
3 operators have filed production on it, most recently Cog Operating LLC since August 2018.
- 612K
- bbl oil, all reported
- 1.25M
- mcf gas incl. casinghead
- 21.1K
- bbl oil, 12 months through Apr 2026
- -2%
- vs the 12 before
- 6
- wells completed on it
- 11.7K
- peak month, bbl (Nov 2010)
PDQ LEASE REPORTS · FIRST SEP 2009 · 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 21,140 · prior 12 21,569(-2%)
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 17,613 · prior 12 27,245(-35%)
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.
- Patriot Resources, Inc.Sep 2009 → Jan 2011 · 17 mo
- RSP Permian, LLCFeb 2011 → Jul 2018 · 90 mo
- COG Operating LLCAug 2018 → Jul 2026 · 96 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
6
wells completed on the lease
- Producing
- 5
- 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.
Developers: this page as JSON is GET /v1/data/leases/tx/o-10-39688, documented in the API reference.