LEASES · O-10-35176 · OIL · DISTRICT 08
Cummins, H.E. -J-
Formentera Operations LLC · Ector County · Goldsmith, W. (Clear Fork, Up.) field
Cummins, H.E. -J- is an RRC oil lease (O-10-35176) in Ector County operated by Formentera Operations LLC, with one well completed on it.
It has reported 9.62K barrels of oil and 62.9K mcf of gas since November 1996, last reporting volume in December 2025 (statewide data runs through April 2026).
No volume was reported in the 12 months through April 2026; the last was in December 2025.
4 operators have filed production on it, most recently Formentera Operations LLC since November 2023.
- 9.62K
- bbl oil, all reported
- 62.9K
- mcf gas incl. casinghead
- 0
- bbl oil, 12 months through Apr 2026
- —
- vs the 12 before
- 1
- wells completed on it
- 312
- peak month, bbl (Nov 1996)
PDQ LEASE REPORTS · FIRST NOV 1996 · LAST VOLUME DEC 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.
12 months through Apr 2026 0 · prior 12 0
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 Apr 2026 4,328 · prior 12 0
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 20 reporting months of oil since the peak in Mar 2021. 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.
- 86%
- first-year decline from the peak (nominal Di 378%)
- 0.6
- b factor (hyperbolic)
- 0.85
- fit R²
- 12
- 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 0 · prior 12 0
Fitted hyperbolic curve from the Mar 2021 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 1 | 1 | 1 | 1 |
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.
- Anadarko Petroleum CorporationNov 1996 → Mar 2007 · 125 mo
- Apache CorporationApr 2007 → Jun 2021 · 171 mo
- Slant Operating, LLCJul 2021 → Oct 2023 · 28 mo
- Formentera Operations LLCNov 2023 → May 2026 · 31 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-10-35176, documented in the API reference.