LEASES · O-9-6330 · OIL · DISTRICT 7C
Mobil-Cook
ReportingExtex Operating Company · Upton County · Heluma, East (Devonian) field
Mobil-Cook is an RRC oil lease (O-9-6330) in Upton County operated by Extex Operating Company, with 6 wells completed on it.
It has reported 310K barrels of oil and 3.28M mcf of gas since January 1993, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 4.75K barrels of oil, down 6% on the year before; the lease peaked at 1.78K barrels in January 1993.
8 operators have filed production on it, most recently Extex Operating Company since February 2021.
- 310K
- bbl oil, all reported
- 3.28M
- mcf gas incl. casinghead
- 4.75K
- bbl oil, last 12 reported
- -6%
- vs the 12 before
- 6
- wells completed on it
- 1.78K
- peak month, bbl (Jan 1993)
PDQ LEASE REPORTS · FIRST JAN 1993 · 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 4,745 · prior 12 5,045(-6%)
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 20,057 · prior 12 28,199(-29%)
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.
- Oryx Energy CompanyJan 1993 → Mar 1995 · 27 mo
- Samson Hydrocarbons CompanyApr 1995 → Jul 1996 · 16 mo
- Samson Lone Star LPAug 1996 → Jun 2007 · 131 mo
- Samson Lone Star, LLCJul 2007 → Dec 2010 · 42 mo
- Three Rivers Operating Co LLCJan 2011 → Jul 2012 · 19 mo
- COG Operating LLCAug 2012 → Dec 2012 · 5 mo
- Legacy Reserves Operating LPJan 2013 → Jan 2021 · 97 mo
- Extex Operating CompanyFeb 2021 → Jul 2026 · 66 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
6
wells completed on the lease
- NO Type on File
- 4
- Producing
- 2
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-9-6330, documented in the API reference.