LEASES · O-9-16403 · OIL · DISTRICT 7C
HASEL11
Diamondback E&P LLC · Upton County · Spraberry (Trend Area) field
Hasel11 is an RRC oil lease (O-9-16403) in Upton County operated by Diamondback E&P LLC, with one well completed on it.
It has reported 51.7K barrels of oil and 125K mcf of gas since November 2007, last reporting volume in March 2026 (statewide data runs through April 2026).
It reported 584 barrels of oil in the 12 months through April 2026, down 78% on the year before; the lease peaked at 2.81K barrels in February 2008.
4 operators have filed production on it, most recently Diamondback E&P LLC since February 2025.
- 51.7K
- bbl oil, all reported
- 125K
- mcf gas incl. casinghead
- 584
- bbl oil, 12 months through Apr 2026
- -78%
- vs the 12 before
- 1
- wells completed on it
- 2.81K
- peak month, bbl (Feb 2008)
PDQ LEASE REPORTS · FIRST NOV 2007 · 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.
12 months through Apr 2026 584 · prior 12 2,623(-78%)
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 814 · prior 12 2,393(-66%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 12 reporting months of oil since the peak in Dec 2024. 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.
- 88%
- first-year decline from the peak (nominal Di 559%)
- 0.8
- b factor (hyperbolic)
- 0.85
- fit R²
- 1.35K
- 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 584
Fitted hyperbolic curve from the Dec 2024 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 25 | 19 | 15 | 13 |
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.
- Henry Petroleum LPNov 2007 → Dec 2008 · 14 mo
- COG Operating LLCJan 2009 → Jun 2018 · 114 mo
- TRP Operating LLCJul 2018 → Jan 2025 · 79 mo
- Diamondback E&P LLCFeb 2025 → Jul 2026 · 18 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-9-16403, documented in the API reference.