LEASES · O-10-39391 · OIL · DISTRICT 08
Hill "61B"
Diamondback E&P LLC · Martin County · Spraberry (Trend Area) field
Hill "61b" is an RRC oil lease (O-10-39391) in Martin County operated by Diamondback E&P LLC, with one well completed on it.
It has reported 63.8K barrels of oil and 62.2K mcf of gas since October 2008, last reporting volume in August 2026 (statewide data runs through August 2026).
It reported 2.02K barrels of oil in the 12 months through August 2026, up 5% on the year before; the lease peaked at 1.9K barrels in December 2008.
2 operators have filed production on it, most recently Diamondback E&P LLC since January 2025.
- 63.8K
- bbl oil, all reported
- 62.2K
- mcf gas incl. casinghead
- 2.02K
- bbl oil, 12 months through Aug 2026
- +5%
- vs the 12 before
- 1
- wells completed on it
- 1.9K
- peak month, bbl (Dec 2008)
PDQ LEASE REPORTS · FIRST OCT 2008 · LAST VOLUME AUG 2026 · STATEWIDE DATA THROUGH AUG 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 Aug 2026 2,018 · prior 12 1,930(+5%)
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 Aug 2026 0 · prior 12 0
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 14 reporting months of oil since the peak in Jul 2025. 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.
- 64%
- first-year decline from the peak (nominal Di 328%)
- 2.0
- b factor (hyperbolic)
- 0.88
- fit R²
- 20.1K
- 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 2,018
Fitted hyperbolic curve from the Jul 2025 peak, dashed 24 months past the last report
| Projected month | Feb 2027 | Aug 2027 | Feb 2028 | Aug 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 105 | 93 | 84 | 77 |
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, with what it reported in them.
- Endeavor Energy Resources L.P.Oct 2008 → Dec 2024 · 195 mo60.4K bbl oil · 62.2K mcf gas
- Diamondback E&P LLCJan 2025 → Nov 2026 · 23 mo3.4K bbl oil · 0 mcf gas
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 Aug 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-10-39391, documented in the API reference.