LEASES · O-9-14613 · OIL · DISTRICT 7C
Clark Ranch South
ReportingTri-Force Operating, L.L.C. · Menard County · Celery (Cook Sand) field
Clark Ranch South is an RRC oil lease (O-9-14613) in Menard County operated by Tri-Force Operating, L.L.C., with 16 wells completed on it.
It has reported 603K barrels of oil since July 1997, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 6.22K barrels of oil, down 14% on the year before; the lease peaked at 4.19K barrels in May 1999.
4 operators have filed production on it, most recently Tri-Force Operating, L.L.C. since December 2011.
- 603K
- bbl oil, all reported
- 0
- mcf gas incl. casinghead
- 6.22K
- bbl oil, last 12 reported
- -14%
- vs the 12 before
- 16
- wells completed on it
- 4.19K
- peak month, bbl (May 1999)
PDQ LEASE REPORTS · FIRST JUL 1997 · 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 6,215 · prior 12 7,218(-14%)
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 May 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.
- 22%
- first-year decline from the peak (nominal Di 30%)
- 1.4
- b factor (hyperbolic)
- 0.73
- fit R²
- 155K
- 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 6,215 · prior 12 7,218(-14%)
Fitted hyperbolic curve from the May 2016 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 494 | 480 | 468 | 456 |
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.
- Daniel Explorations IncJul 1997 → Oct 2007 · 124 mo
- Spirit Energy L.L.C.Nov 2007 → May 2011 · 43 mo
- Leclair Operating Co., Inc.Jun 2011 → Nov 2011 · 6 mo
- Tri-Force Operating, L.L.C.Dec 2011 → Jul 2026 · 176 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
16
wells completed on the lease
- NO Type on File
- 9
- Producing
- 4
- Plugged
- 2
- Shut IN
- 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 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-9-14613, documented in the API reference.