LEASES · O-9-5299 · OIL · DISTRICT 7C
Clark 15
Diamondback E&P LLC · Reagan County · Spraberry (Trend Area) field
Clark 15 is an RRC oil lease (O-9-5299) in Reagan County operated by Diamondback E&P LLC, with 7 wells completed on it.
It has reported 204K barrels of oil and 1.24M mcf of gas since January 1993, last reporting volume in April 2026 (statewide data runs through April 2026).
It reported 742 barrels of oil in the 12 months through April 2026, up 23% on the year before; the lease peaked at 2.73K barrels in May 2006.
6 operators have filed production on it, most recently Diamondback E&P LLC since January 2025.
- 204K
- bbl oil, all reported
- 1.24M
- mcf gas incl. casinghead
- 742
- bbl oil, 12 months through Apr 2026
- +23%
- vs the 12 before
- 7
- wells completed on it
- 2.73K
- peak month, bbl (May 2006)
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.
12 months through Apr 2026 742 · prior 12 601(+23%)
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 7,347 · prior 12 8,215(-11%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 84 reporting months of oil since the peak in May 2019. 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.
- 47%
- first-year decline from the peak (nominal Di 73%)
- 0.4
- b factor (hyperbolic)
- 0.87
- fit R²
- 2.95K
- 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 742 · prior 12 601(+23%)
Fitted hyperbolic curve from the May 2019 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 36 | 32 | 29 | 26 |
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.
- Tamarack Petroleum Company, Inc.Jan 1993 → Nov 2007 · 179 mo
- Mariner Energy, Inc.Dec 2007 → Nov 2010 · 36 mo
- Apache CorporationDec 2010 → Feb 2017 · 75 mo
- Parsley Energy Operations, LLCMar 2017 → Nov 2020 · 45 mo
- Endeavor Energy Resources L.P.Dec 2020 → Dec 2024 · 49 mo
- Diamondback E&P LLCJan 2025 → Jul 2026 · 19 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
7
wells completed on the lease
- Not on Schedule
- 3
- Plugged
- 2
- Producing
- 1
- Shut In
- 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-9-5299, documented in the API reference.