LEASES · O-14-9235 · OIL · DISTRICT 10
Stiles 18B
Formentera Operations LLC · Wheeler County · Mills Ranch (Granite Wash Cons.) field
Stiles 18b is an RRC oil lease (O-14-9235) in Wheeler County operated by Formentera Operations LLC, with one well completed on it.
It has reported 73.4K barrels of oil and 429K mcf of gas since September 2014, last reporting volume in August 2026 (statewide data runs through August 2026).
It reported 1.05K barrels of oil in the 12 months through August 2026, up 68% on the year before; the lease peaked at 5.64K barrels in October 2014.
3 operators have filed production on it, most recently Formentera Operations LLC since June 2021.
- 73.4K
- bbl oil, all reported
- 429K
- mcf gas incl. casinghead
- 1.05K
- bbl oil, 12 months through Aug 2026
- +68%
- vs the 12 before
- 1
- wells completed on it
- 5.64K
- peak month, bbl (Oct 2014)
PDQ LEASE REPORTS · FIRST SEP 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 1,052 · prior 12 626(+68%)
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 12,972 · prior 12 18,649(-30%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 120 reporting months of oil since the peak in Sep 2016. 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 48%)
- 0.3
- b factor (hyperbolic)
- 0.94
- fit R²
- 3.01K
- 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 1,052 · prior 12 626(+68%)
Fitted hyperbolic curve from the Sep 2016 peak, dashed 24 months past the last report
| Projected month | Feb 2027 | Aug 2027 | Feb 2028 | Aug 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 34 | 31 | 28 | 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, with what it reported in them.
- Apache CorporationSep 2014 → Dec 2014 · 4 mo15.9K bbl oil · 30.7K mcf gas
- Tapstone Energy, LLCJan 2015 → May 2021 · 77 mo52.3K bbl oil · 283K mcf gas
- Formentera Operations LLCJun 2021 → Nov 2026 · 66 mo5.2K bbl oil · 115K mcf gas
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 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-14-9235, documented in the API reference.