LEASES · O-8-28511 · OIL · DISTRICT 7B
Riggs
ReportingExtex Operating Company · Nolan County · Thunder Valley (Canyon Sand) field
Riggs is an RRC oil lease (O-8-28511) in Nolan County operated by Extex Operating Company, with one well completed on it.
It has reported 87.6K barrels of oil since July 1998, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 171 barrels of oil, down 11% on the year before; the lease peaked at 840 barrels in July 1998.
4 operators have filed production on it, most recently Extex Operating Company since February 2021.
- 87.6K
- bbl oil, all reported
- 0
- mcf gas incl. casinghead
- 171
- bbl oil, last 12 reported
- -11%
- vs the 12 before
- 1
- wells completed on it
- 840
- peak month, bbl (Jul 1998)
PDQ LEASE REPORTS · FIRST JUL 1998 · 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 171 · prior 12 193(-11%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 105 reporting months of oil since the peak in Jul 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.
- 40%
- first-year decline from the peak (nominal Di 55%)
- 0.3
- b factor (hyperbolic)
- 0.83
- fit R²
- 717
- 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 171 · prior 12 193(-11%)
Fitted hyperbolic curve from the Jul 2017 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 10 | 9 | 8 | 8 |
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.
- Baytech, Inc.Jul 1998 → Dec 2002 · 54 mo
- Patriot Resources, Inc.Jan 2003 → Dec 2011 · 108 mo
- Legacy Reserves Operating LPJan 2012 → Jan 2021 · 109 mo
- Extex Operating CompanyFeb 2021 → Jul 2026 · 66 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-8-28511, documented in the API reference.