LEASES · O-10-40714 · OIL · DISTRICT 08
Brunello
Diamondback E&P LLC · Martin County · Spraberry (Trend Area) field
Brunello is an RRC oil lease (O-10-40714) in Martin County operated by Diamondback E&P LLC, with one well completed on it.
It has reported 49.3K barrels of oil and 59.3K mcf of gas since December 2010, last reporting volume in November 2025 (statewide data runs through April 2026).
It reported 720 barrels of oil in the 12 months through April 2026, down 51% on the year before; the lease peaked at 1.24K barrels in January 2011.
4 operators have filed production on it, most recently Diamondback E&P LLC since November 2018.
- 49.3K
- bbl oil, all reported
- 59.3K
- mcf gas incl. casinghead
- 720
- bbl oil, 12 months through Apr 2026
- -51%
- vs the 12 before
- 1
- wells completed on it
- 1.24K
- peak month, bbl (Jan 2011)
PDQ LEASE REPORTS · FIRST DEC 2010 · LAST VOLUME NOV 2025 · 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.
12 months through Apr 2026 720 · prior 12 1,463(-51%)
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.
12 months through Apr 2026 1,217 · prior 12 1,814(-33%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 68 reporting months of oil since the peak in Apr 2020. 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.
- 71%
- first-year decline from the peak (nominal Di 331%)
- 1.4
- b factor (hyperbolic)
- 0.90
- fit R²
- 18.2K
- 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 720 · prior 12 1,463(-51%)
Fitted hyperbolic curve from the Apr 2020 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 75 | 71 | 68 | 65 |
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.
- Opal Resources Operating Co.,llcNov 2010 → Apr 2011 · 6 mo
- W&T Offshore, Inc.May 2011 → Dec 2014 · 44 mo
- Ajax Resources, LLCJan 2015 → Oct 2018 · 46 mo
- Diamondback E&P LLCNov 2018 → Jul 2026 · 93 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
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-10-40714, documented in the API reference.