LEASES · O-1-1364 · OIL · DISTRICT 01
Halff & Oppenheimer
ReportingBigfoot Oil LLC · Frio County · Pearsall (Navarro Sand) field
Halff & Oppenheimer is an RRC oil lease (O-1-1364) in Frio County operated by Bigfoot Oil LLC, with 19 wells completed on it.
It has reported 480K barrels of oil and 38.3K mcf of gas since January 1993, last reporting volume in September 2025 (statewide data runs through April 2026).
The last 12 reported months total 615 barrels of oil, down 87% on the year before; the lease peaked at 2.57K barrels in December 2019.
5 operators have filed production on it, most recently Bigfoot Oil LLC since July 2017.
- 480K
- bbl oil, all reported
- 38.3K
- mcf gas incl. casinghead
- 615
- bbl oil, last 12 reported
- -87%
- vs the 12 before
- 19
- wells completed on it
- 2.57K
- peak month, bbl (Dec 2019)
PDQ LEASE REPORTS · FIRST JAN 1993 · LAST VOLUME SEP 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.
Last 12 months 615 · prior 12 4,655(-87%)
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 0 · prior 12 0
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps exponential curve fitted to the 66 reporting months of oil since the peak in Dec 2019. 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.
- 34%
- first-year decline from the peak (nominal Di 42%)
- 0.0
- b factor (exponential)
- 0.76
- fit R²
- 4.65K
- 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 615 · prior 12 4,655(-87%)
Fitted exponential curve from the Dec 2019 peak, dashed 24 months past the last report
| Projected month | Oct 2026 | Apr 2027 | Oct 2027 | Apr 2028 |
|---|---|---|---|---|
| On the curve, bbl per month | 133 | 108 | 87 | 71 |
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.
- Lawbar Petroleum, Inc.Jan 1993 → Dec 1999 · 84 mo
- Spur Operating Co.Jan 2000 → Feb 2012 · 146 mo
- Jenex Petroleum CorporationMar 2012 → Aug 2016 · 54 mo
- Jenco Petroleum CorporationSep 2016 → Jun 2017 · 10 mo
- Bigfoot Oil LLCJul 2017 → Jul 2026 · 109 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
19
wells completed on the lease
- Plugged
- 7
- Shut IN
- 5
- NO Type on File
- 4
- Producing
- 1
- Injection
- 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-1-1364, documented in the API reference.