LEASES · O-10-8745 · OIL · DISTRICT 08
Keystone Cattle Co.
ReportingHighmark Energy Operating, LLC · Winkler County · Flying -W- (Wolfcamp) field
Keystone Cattle CO. is an RRC oil lease (O-10-8745) in Winkler County operated by Highmark Energy Operating, LLC, with 10 wells completed on it.
It has reported 360K barrels of oil and 1.34M mcf of gas since January 1993, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 6.78K barrels of oil, down 13% on the year before; the lease peaked at 3.32K barrels in November 1993.
6 operators have filed production on it, most recently Highmark Energy Operating, LLC since March 2023.
- 360K
- bbl oil, all reported
- 1.34M
- mcf gas incl. casinghead
- 6.78K
- bbl oil, last 12 reported
- -13%
- vs the 12 before
- 10
- wells completed on it
- 3.32K
- peak month, bbl (Nov 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 6,776 · prior 12 7,788(-13%)
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 165 · prior 12 2,042(-92%)
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.
- Pennzoil Petroleum CompanyJan 1993 → Jan 1995 · 25 mo
- Pennzoil Exploration & Prod. Co.Feb 1995 → Feb 1999 · 49 mo
- Pennzenergy Exp. & Prod., L.L.C.Mar 1999 → Mar 2000 · 13 mo
- Devon Energy Production Co, L.P.Apr 2000 → Apr 2008 · 97 mo
- Legacy Reserves Operating LPMay 2008 → Feb 2023 · 178 mo
- Highmark Energy Operating, LLCMar 2023 → Jul 2026 · 41 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
10
wells completed on the lease
- NO Type on File
- 6
- Producing
- 2
- Plugged
- 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-10-8745, documented in the API reference.