LEASES · O-10-20847 · OIL · DISTRICT 08
Westbrook Southeast Unit
ReportingBce-Mach III LLC · Mitchell County · Westbrook field
Westbrook Southeast Unit is an RRC oil lease (O-10-20847) in Mitchell County operated by Bce-Mach Iii LLC, with 632 wells completed on it.
It has reported 17.5M barrels of oil and 969K mcf of gas since January 1993, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 206K barrels of oil, down 7% on the year before; the lease peaked at 87.3K barrels in May 2005.
6 operators have filed production on it, most recently Bce-Mach Iii LLC since September 2025.
- 17.5M
- bbl oil, all reported
- 969K
- mcf gas incl. casinghead
- 206K
- bbl oil, last 12 reported
- -7%
- vs the 12 before
- 632
- wells completed on it
- 87.3K
- peak month, bbl (May 2005)
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 206,357 · prior 12 221,075(-7%)
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 13,009 · prior 12 15,112(-14%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 120 reporting months of oil since the peak in May 2016. 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.
- 10%
- first-year decline from the peak (nominal Di 12%)
- 1.3
- b factor (hyperbolic)
- 0.96
- fit R²
- 5.5M
- 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 206,357 · prior 12 221,075(-7%)
Fitted hyperbolic curve from the May 2016 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 16,500 | 16,137 | 15,791 | 15,462 |
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.
- Fina Oil & Chemical CompanyJan 1993 → May 1999 · 77 mo
- First Permian, L.L.C.Jun 1999 → Apr 2002 · 35 mo
- Energen Resources CorporationMay 2002 → Jan 2019 · 201 mo
- Diamondback E&P LLCFeb 2019 → Jun 2019 · 5 mo
- Sabinal Energy Operating, LLCJul 2019 → Aug 2025 · 74 mo
- Bce-Mach III LLCSep 2025 → Jul 2026 · 11 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
632
wells completed on the lease
- Producing
- 227
- Shut IN
- 135
- NO Type on File
- 107
- Injection
- 96
- Plugged
- 62
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-10-20847, documented in the API reference.