LEASES · O-1-15744 · OIL · DISTRICT 01
Winterbotham Zav
ReportingExco Operating Company, LP · Zavala County · Briscoe Ranch (Eagleford) field
Winterbotham Zav is an RRC oil lease (O-1-15744) in Zavala County operated by Exco Operating Company, LP, with 57 wells completed on it.
It has reported 16M barrels of oil and 9.21M mcf of gas since September 2011, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 680K barrels of oil, down 11% on the year before; the lease peaked at 331K barrels in July 2015.
2 operators have filed production on it, most recently Exco Operating Company, LP since July 2013.
- 16M
- bbl oil, all reported
- 9.21M
- mcf gas incl. casinghead
- 680K
- bbl oil, last 12 reported
- -11%
- vs the 12 before
- 57
- wells completed on it
- 331K
- peak month, bbl (Jul 2015)
PDQ LEASE REPORTS · FIRST SEP 2011 · 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 679,502 · prior 12 761,396(-11%)
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 517,152 · prior 12 527,747(-2%)
Decline curve
None shown. Petrora fits an Arps curve only when the last ten years of oil reports follow one decline closely enough to project (R² of 0.7 or better over at least a year since the peak). This lease's recent history does not, so a projection would be a guess dressed as a number.
Who reported it
Each run of months one operator filed the production report, oldest first.
- Chesapeake Operating, Inc.Sep 2011 → Jun 2013 · 22 mo
- Exco Operating Company, LPJul 2013 → Jul 2026 · 157 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
57
wells completed on the lease
- Producing
- 54
- Plugged
- 2
- NO Type on File
- 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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