LEASES · O-10-44451 · OIL · DISTRICT 08
Halfmann 36
ReportingOvintiv USA Inc. · Glasscock County · Spraberry (Trend Area) field
Halfmann 36 is an RRC oil lease (O-10-44451) in Glasscock County operated by Ovintiv USA Inc., with 5 wells completed on it.
It has reported 91.8K barrels of oil and 325K mcf of gas since October 2013, last reporting volume in September 2025 (statewide data runs through April 2026).
The last 12 reported months total 187 barrels of oil, down 72% on the year before; the lease peaked at 4.09K barrels in June 2014.
4 operators have filed production on it, most recently Ovintiv USA Inc. since February 2020.
- 91.8K
- bbl oil, all reported
- 325K
- mcf gas incl. casinghead
- 187
- bbl oil, last 12 reported
- -72%
- vs the 12 before
- 5
- wells completed on it
- 4.09K
- peak month, bbl (Jun 2014)
PDQ LEASE REPORTS · FIRST OCT 2013 · 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 187 · prior 12 663(-72%)
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 910 · prior 12 2,900(-69%)
Decline curve
A MODEL FITTED TO THE REPORTS, NOT A REPORT
An Arps exponential curve fitted to the 112 reporting months of oil since the peak in Jun 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.
- 32%
- first-year decline from the peak (nominal Di 38%)
- 0.0
- b factor (exponential)
- 0.84
- fit R²
- 868
- 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 187 · prior 12 663(-72%)
Fitted exponential curve from the Jun 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 | 24 | 19 | 16 | 13 |
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.
- Athlon FE Operating LLCOct 2013 → Dec 2013 · 3 mo
- Athlon Holdings LPJan 2014 → Jan 2015 · 13 mo
- Encana Oil & Gas(usa) Inc.Feb 2015 → Jan 2020 · 60 mo
- Ovintiv USA Inc.Feb 2020 → Jul 2026 · 78 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
5
wells completed on the lease
- Shut IN
- 3
- NO Type on File
- 1
- Plugged
- 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-10-44451, documented in the API reference.