LEASES · O-10-58221 · OIL · DISTRICT 08
Tubb-Vaughn 21I
ReportingPioneer Natural Res. USA, Inc. · Midland County · Spraberry (Trend Area) field
Tubb-Vaughn 21i is an RRC oil lease (O-10-58221) in Midland County operated by Pioneer Natural Res. USA, Inc., with one well completed on it.
It has reported 285K barrels of oil and 713K mcf of gas since October 2022, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 22.7K barrels of oil, down 60% on the year before; the lease peaked at 20.6K barrels in May 2023.
- 285K
- bbl oil, all reported
- 713K
- mcf gas incl. casinghead
- 22.7K
- bbl oil, last 12 reported
- -60%
- vs the 12 before
- 1
- wells completed on it
- 20.6K
- peak month, bbl (May 2023)
PDQ LEASE REPORTS · FIRST OCT 2022 · 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.
Last 12 months 22,704 · prior 12 57,150(-60%)
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 106,866 · prior 12 226,493(-53%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps exponential curve fitted to the 36 reporting months of oil since the peak in May 2023. 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.
- 69%
- first-year decline from the peak (nominal Di 117%)
- 0.0
- b factor (exponential)
- 0.94
- fit R²
- 7.23K
- 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 22,704 · prior 12 57,150(-60%)
Fitted exponential curve from the May 2023 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 393 | 219 | 122 | 68 |
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.Oct 2022 → Jul 2026 · 46 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-10-58221, documented in the API reference.