LEASES · O-10-20543 · OIL · DISTRICT 08
Goldsmith-Cummins /Deep/ Unit
Formentera Operations LLC · Ector County · Goldsmith (Clear Fork) field
Goldsmith-Cummins /Deep/ Unit is an RRC oil lease (O-10-20543) in Ector County operated by Formentera Operations LLC, with 396 wells completed on it.
It has reported 10.2M barrels of oil and 28.2M mcf of gas since the record begins in January 1993, last reporting volume in August 2026 (statewide data runs through August 2026).
It reported 56.2K barrels of oil in the 12 months through August 2026, up 1% on the year before; the lease peaked at 77.2K barrels in December 1997.
5 operators have filed production on it, most recently Formentera Operations LLC since November 2023.
- 10.2M
- bbl oil, all reported
- 28.2M
- mcf gas incl. casinghead
- 56.2K
- bbl oil, 12 months through Aug 2026
- +1%
- vs the 12 before
- 396
- wells completed on it
- 77.2K
- peak month, bbl (Dec 1997)
PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH · 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 56,184 · prior 12 55,363(+1%)
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 108,184 · prior 12 94,297(+15%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 112 reporting months of oil since the peak in May 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.
- 19%
- first-year decline from the peak (nominal Di 23%)
- 1.0
- b factor (hyperbolic)
- 0.88
- fit R²
- 1.06M
- 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 56,184 · prior 12 55,363(+1%)
Fitted hyperbolic curve from the May 2017 peak, dashed 24 months past the last report
| Projected month | Feb 2027 | Aug 2027 | Feb 2028 | Aug 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 4,064 | 3,924 | 3,793 | 3,671 |
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.
- Arco Oil & Gas Co.Jan 1993 → Jan 1993 · 1 mo26.4K bbl oil · 68K mcf gas
- Anadarko Petroleum CorporationFeb 1993 → Mar 2007 · 170 mo6.81M bbl oil · 18.6M mcf gas
- Apache CorporationApr 2007 → Jun 2021 · 171 mo3.08M bbl oil · 8.87M mcf gas
- Slant Operating, LLCJul 2021 → Oct 2023 · 28 mo155K bbl oil · 293K mcf gas
- Formentera Operations LLCNov 2023 → Nov 2026 · 37 mo166K bbl oil · 315K mcf gas
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
396
wells completed on the lease
- Shut In
- 240
- Producing
- 64
- Plugged
- 57
- Injection
- 34
- Partial Plug
- 1
Operates them now
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-10-20543, documented in the API reference.