LEASES · O-4-13743 · OIL · DISTRICT 04
Vanco
ReportingRattlesnake Operating Co, LLC · Duval County · Lopez, North (Lopez) field
Vanco is an RRC oil lease (O-4-13743) in Duval County operated by Rattlesnake Operating CO, LLC, with 9 wells completed on it.
It has reported 27.5K barrels of oil since August 2012, last reporting volume in March 2026 (statewide data runs through April 2026).
The last 12 reported months total 483 barrels of oil, down 63% on the year before; the lease peaked at 1.23K barrels in October 2012.
4 operators have filed production on it, most recently Rattlesnake Operating CO, LLC since October 2025.
- 27.5K
- bbl oil, all reported
- 0
- mcf gas incl. casinghead
- 483
- bbl oil, last 12 reported
- -63%
- vs the 12 before
- 9
- wells completed on it
- 1.23K
- peak month, bbl (Oct 2012)
PDQ LEASE REPORTS · FIRST AUG 2012 · LAST VOLUME MAR 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 483 · prior 12 1,299(-63%)
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.
- Sanchez Oil & Gas CorporationAug 2012 → Mar 2016 · 44 mo
- Dallas Petroleum Group, LLCApr 2016 → May 2023 · 86 mo
- Jalapeno Operating Company, LLCJun 2023 → Sep 2025 · 28 mo
- Rattlesnake Operating Co, LLCOct 2025 → Jul 2026 · 10 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
9
wells completed on the lease
- Shut IN
- 7
- Producing
- 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-4-13743, documented in the API reference.