LEASES · O-1-17171 · OIL · DISTRICT 01
Barnhart (EF) D
ReportingMarathon Oil EF LLC · Gonzales County · Eagleville (Eagle Ford-1) field
Barnhart (EF) D is an RRC oil lease (O-1-17171) in Gonzales County operated by Marathon Oil EF LLC, with 8 wells completed on it.
It has reported 1.06M barrels of oil and 1.99M mcf of gas since October 2013, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 9.65K barrels of oil, down 35% on the year before; the lease peaked at 94.3K barrels in March 2015.
- 1.06M
- bbl oil, all reported
- 1.99M
- mcf gas incl. casinghead
- 9.65K
- bbl oil, last 12 reported
- -35%
- vs the 12 before
- 8
- wells completed on it
- 94.3K
- peak month, bbl (Mar 2015)
PDQ LEASE REPORTS · FIRST OCT 2013 · 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 9,650 · prior 12 14,816(-35%)
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 15,295 · prior 12 31,483(-51%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps hyperbolic curve fitted to the 119 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.
- 42%
- first-year decline from the peak (nominal Di 62%)
- 0.4
- b factor (hyperbolic)
- 0.88
- fit R²
- 57.8K
- 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 9,650 · prior 12 14,816(-35%)
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 | 527 | 484 | 446 | 412 |
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.
- Marathon Oil EF LLCOct 2013 → Jul 2026 · 154 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
8
wells completed on the lease
- Shut In
- 6
- Producing
- 2
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-1-17171, documented in the API reference.