LEASES · O-2-11207 · OIL · DISTRICT 02
Rancho Grande Trust Unit No. 1
ReportingMarathon Oil EF LLC · Karnes County · Eagleville (Eagle Ford-1), Sugarkane (Eagle Ford) field
Rancho Grande Trust Unit NO. 1 is an RRC oil lease (O-2-11207) in Karnes County operated by Marathon Oil EF LLC, with 12 wells completed on it.
It has reported 996K barrels of oil and 3.56M mcf of gas since August 2014, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 12K barrels of oil, down 36% on the year before; the lease peaked at 68.5K barrels in April 2016.
2 operators have filed production on it, most recently Marathon Oil EF LLC since September 2014.
- 996K
- bbl oil, all reported
- 3.56M
- mcf gas incl. casinghead
- 12K
- bbl oil, last 12 reported
- -36%
- vs the 12 before
- 12
- wells completed on it
- 68.5K
- peak month, bbl (Apr 2016)
PDQ LEASE REPORTS · FIRST AUG 2014 · 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 11,982 · prior 12 18,638(-36%)
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.
Last 12 months 29,229 · prior 12 40,672(-28%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 101 reporting months of oil since the peak in Dec 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.
- 59%
- first-year decline from the peak (nominal Di 113%)
- 0.5
- b factor (hyperbolic)
- 0.84
- fit R²
- 108K
- 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 11,982 · prior 12 18,638(-36%)
Fitted hyperbolic curve from the Dec 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 | 974 | 888 | 813 | 747 |
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.
- Sanchez Oil & Gas CorporationAug 2014 → Aug 2014 · 1 mo
- Marathon Oil EF LLCSep 2014 → Jul 2026 · 143 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
12
wells completed on the lease
- Not on Schedule
- 6
- Producing
- 5
- 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.
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