LEASES · O-9-18963 · OIL · DISTRICT 7C
Welch Trust 13
Diamondback E&P LLC · Upton County · Spraberry (Trend Area) R 40 Exc field
Welch Trust 13 is an RRC oil lease (O-9-18963) in Upton County operated by Diamondback E&P LLC, with 2 wells completed on it.
It has reported 46.3K barrels of oil and 245K mcf of gas since November 2014, last reporting volume in August 2026 (statewide data runs through August 2026).
It reported 151 barrels of oil in the 12 months through August 2026, down 26% on the year before; the lease peaked at 4.98K barrels in December 2014.
3 operators have filed production on it, most recently Diamondback E&P LLC since January 2025.
- 46.3K
- bbl oil, all reported
- 245K
- mcf gas incl. casinghead
- 151
- bbl oil, 12 months through Aug 2026
- -26%
- vs the 12 before
- 2
- wells completed on it
- 4.98K
- peak month, bbl (Dec 2014)
PDQ LEASE REPORTS · FIRST NOV 2014 · 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 151 · prior 12 204(-26%)
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 28(-100%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps exponential curve fitted to the 114 reporting months of oil since the peak in Jan 2017. 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.
- 36%
- first-year decline from the peak (nominal Di 45%)
- 0.0
- b factor (exponential)
- 0.87
- fit R²
- 198
- 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 151 · prior 12 204(-26%)
Fitted exponential curve from the Jan 2017 peak, dashed 24 months past the last report
| Projected month | Feb 2027 | Aug 2027 | Feb 2028 | Aug 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 7 | 5 | 4 | 3 |
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.
- Parsley Energy Operations, LLCNov 2014 → May 2017 · 31 mo32.4K bbl oil · 182K mcf gas
- Endeavor Energy Resources L.P.Jun 2017 → Dec 2024 · 91 mo13.6K bbl oil · 62.6K mcf gas
- Diamondback E&P LLCJan 2025 → Nov 2026 · 23 mo265 bbl oil · 2 mcf gas
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
2
wells completed on the lease
- 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 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-9-18963, documented in the API reference.