LEASES · O-10-40730 · OIL · DISTRICT 08
Mabee 239D
ReportingCOG Operating LLC · Martin County · Spraberry (Trend Area) field
Mabee 239d is an RRC oil lease (O-10-40730) in Martin County operated by Cog Operating LLC, with 23 wells completed on it.
It has reported 1.01M barrels of oil and 2.61M mcf of gas since September 2010, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 15.2K barrels of oil, down 40% on the year before; the lease peaked at 19.4K barrels in July 2012.
3 operators have filed production on it, most recently Cog Operating LLC since August 2017.
- 1.01M
- bbl oil, all reported
- 2.61M
- mcf gas incl. casinghead
- 15.2K
- bbl oil, last 12 reported
- -40%
- vs the 12 before
- 23
- wells completed on it
- 19.4K
- peak month, bbl (Jul 2012)
PDQ LEASE REPORTS · FIRST SEP 2010 · 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 15,185 · prior 12 25,506(-40%)
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 113,200 · prior 12 127,919(-12%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 118 reporting months of oil since the peak in Jul 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.
- 54%
- first-year decline from the peak (nominal Di 169%)
- 1.8
- b factor (hyperbolic)
- 0.73
- fit R²
- 404K
- 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 15,185 · prior 12 25,506(-40%)
Fitted hyperbolic curve from the Jul 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 | 1,193 | 1,163 | 1,134 | 1,108 |
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.
- Reliance Energy, Inc.Sep 2010 → Dec 2010 · 4 mo
- OXY USA Inc.Jan 2011 → Jul 2017 · 79 mo
- COG Operating LLCAug 2017 → Jul 2026 · 108 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
23
wells completed on the lease
- Shut IN
- 12
- Plugged
- 7
- Producing
- 2
- Water Supply
- 1
- NO Type on File
- 1
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-10-40730, documented in the API reference.