LEASES · O-13-29979 · OIL · DISTRICT 09
Cox, G. R. "A"
ReportingExtech Operating, LLC · Jack County · Perrin, East (Strawn Upper) field
Cox, G. R. "A" is an RRC oil lease (O-13-29979) in Jack County operated by Extech Operating, LLC, with one well completed on it.
It has reported 13K barrels of oil and 113K mcf of gas since December 2001, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 441 barrels of oil, down 2% on the year before; the lease peaked at 173 barrels in October 2015.
4 operators have filed production on it, most recently Extech Operating, LLC since January 2020.
- 13K
- bbl oil, all reported
- 113K
- mcf gas incl. casinghead
- 441
- bbl oil, last 12 reported
- -2%
- vs the 12 before
- 1
- wells completed on it
- 173
- peak month, bbl (Oct 2015)
PDQ LEASE REPORTS · FIRST DEC 2001 · 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 441 · prior 12 449(-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.
Last 12 months 2,861 · prior 12 3,319(-14%)
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.
- Gonzenbach, Glen DDec 2001 → Aug 2007 · 69 mo
- Glen D. Gonzenbach, LLCSep 2007 → Dec 2016 · 112 mo
- Gonzenbach Oil & Gas, LLCJan 2017 → Dec 2019 · 36 mo
- Extech Operating, LLCJan 2020 → Jul 2026 · 79 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.
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