LEASES · O-4-13985 · OIL · DISTRICT 04
Welder-Gulley
ReportingSun Exploration, Inc. · San Patricio County · Oneil (5500) field
Welder-Gulley is an RRC oil lease (O-4-13985) in San Patricio County operated by Sun Exploration, Inc., with one well completed on it.
It has reported 21.3K barrels of oil and 14.3K mcf of gas since January 2016, last reporting volume in April 2026 (statewide data runs through April 2026).
The last 12 reported months total 65 barrels of oil, down 91% on the year before; the lease peaked at 869 barrels in February 2016.
3 operators have filed production on it, most recently Sun Exploration, Inc. since April 2019.
- 21.3K
- bbl oil, all reported
- 14.3K
- mcf gas incl. casinghead
- 65
- bbl oil, last 12 reported
- -91%
- vs the 12 before
- 1
- wells completed on it
- 869
- peak month, bbl (Feb 2016)
PDQ LEASE REPORTS · FIRST JAN 2016 · 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 65 · prior 12 713(-91%)
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 1,116 · prior 12 1,488(-25%)
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.
- Mertz Energy LLCJan 2016 → Apr 2017 · 16 mo
- Poco LLCMay 2017 → Mar 2019 · 23 mo
- Sun Exploration, Inc.Apr 2019 → Jul 2026 · 88 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
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-4-13985, documented in the API reference.