LEASES · O-10-26670 · OIL · DISTRICT 08
O'Brien, G. W. Etal
ReportingSundown Energy LP · Ward County and Winkler · Wagon Wheel (Penn) field
O'Brien, G. W. Etal is an RRC oil lease (O-10-26670) in Ward County operated by Sundown Energy LP, with 40 wells completed on it.
It has reported 3.03M barrels of oil and 7.17M mcf of gas since January 1993, last reporting volume in March 2026 (statewide data runs through April 2026).
The last 12 reported months total 185K barrels of oil, down 24% on the year before; the lease peaked at 82.9K barrels in October 2019.
6 operators have filed production on it, most recently Sundown Energy LP since May 2021.
- 3.03M
- bbl oil, all reported
- 7.17M
- mcf gas incl. casinghead
- 185K
- bbl oil, last 12 reported
- -24%
- vs the 12 before
- 40
- wells completed on it
- 82.9K
- peak month, bbl (Oct 2019)
PDQ LEASE REPORTS · FIRST JAN 1993 · LAST VOLUME MAR 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 185,210 · prior 12 244,561(-24%)
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 494,633 · prior 12 677,021(-27%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 78 reporting months of oil since the peak in Oct 2019. The dashed line below is that curve, drawn over the months it was fitted to and then 24 months past the last report; where it parts from the columns is where the model stops describing the lease. It describes the trend of past reports. It does not know about recompletions, shut-ins, or new wells, and it is shown only when the lease reported within the last year and the curve explains most of the history.
- 40%
- first-year decline from the peak (nominal Di 88%)
- 2.0
- b factor (hyperbolic)
- 0.85
- fit R²
- 5.38M
- bbl remaining on the curve, to 1 per month
Oil, barrels reported months since the peak, with the fitted curve and its projection
Last 12 months 185,210 · prior 12 244,561(-24%)
Fitted hyperbolic curve from the Oct 2019 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 16,655 | 16,130 | 15,652 | 15,215 |
Quoting a projected figure as if it were reported would be wrong; the reported figures are the ones in the charts and the table view. How production is reported →
Who reported it
Each run of months one operator filed the production report, oldest first.
- Chevron U. S. A. Inc.Jan 1993 → Aug 2003 · 128 mo
- BC Operating, Inc.Sep 2003 → Oct 2004 · 14 mo
- Celero Energy, L.P.Nov 2004 → Sep 2005 · 11 mo
- Whiting Oil and Gas CorporationOct 2005 → Oct 2016 · 133 mo
- Four Corners Petroleum II, LLCNov 2016 → Apr 2021 · 54 mo
- Sundown Energy LPMay 2021 → Jul 2026 · 63 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
40
wells completed on the lease
- NO Production
- 20
- Not on Schedule
- 10
- Shut In
- 5
- Plugged
- 3
- Injection
- 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-10-26670, documented in the API reference.