LEASES · O-10-50715 · OIL · DISTRICT 08
Cook E 20A
ReportingVital Energy, Inc. · Glasscock County · Spraberry (Trend Area) field
Cook E 20a is an RRC oil lease (O-10-50715) in Glasscock County operated by Vital Energy, Inc., with one well completed on it.
It has reported 166K barrels of oil and 289K mcf of gas since August 2018, last reporting volume in June 2025 (statewide data runs through April 2026).
The last 12 reported months total 1.28K barrels of oil, down 80% on the year before; the lease peaked at 21.1K barrels in August 2018.
3 operators have filed production on it, most recently Vital Energy, Inc. since February 2023.
- 166K
- bbl oil, all reported
- 289K
- mcf gas incl. casinghead
- 1.28K
- bbl oil, last 12 reported
- -80%
- vs the 12 before
- 1
- wells completed on it
- 21.1K
- peak month, bbl (Aug 2018)
PDQ LEASE REPORTS · FIRST AUG 2018 · LAST VOLUME JUN 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.
Last 12 months 1,277 · prior 12 6,300(-80%)
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.
Last 12 months 10,999 · prior 12 25,836(-57%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 83 reporting months of oil since the peak in Aug 2018. 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.
- 87%
- first-year decline from the peak (nominal Di 497%)
- 0.8
- b factor (hyperbolic)
- 0.95
- fit R²
- 42.4K
- 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 1,277 · prior 12 6,300(-80%)
Fitted hyperbolic curve from the Aug 2018 peak, dashed 24 months past the last report
| Projected month | Jul 2026 | Jan 2027 | Jul 2027 | Jan 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 269 | 249 | 233 | 218 |
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.
- Pioneer Natural Res. USA, Inc.Aug 2018 → Nov 2019 · 16 mo
- Laredo Petroleum, Inc.Dec 2019 → Jan 2023 · 38 mo
- Vital Energy, Inc.Feb 2023 → Jan 2026 · 36 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-10-50715, documented in the API reference.