LEASES · O-1-839 · OIL · DISTRICT 01
Hartfield, Lola
Donoco Oil Company · Guadalupe County · La Vernia field
Hartfield, Lola is an RRC oil lease (O-1-839) in Guadalupe County operated by Donoco Oil Company, with 3 wells completed on it.
It has reported 310 barrels of oil and 13 mcf of gas since the record begins in January 1993, last reporting volume in August 2026 (statewide data runs through August 2026).
It reported 7 barrels of oil in the 12 months through August 2026; the lease peaked at 27 barrels in February 1996.
2 operators have filed production on it, most recently Donoco Oil Company since February 1993.
- 310
- bbl oil, all reported
- 13
- mcf gas incl. casinghead
- 7
- bbl oil, 12 months through Aug 2026
- —
- vs the 12 before
- 3
- wells completed on it
- 27
- peak month, bbl (Feb 1996)
PDQ LEASE REPORTS · ON RECORD FROM JAN 1993, THE RECORD'S FIRST MONTH · LAST VOLUME AUG 2026 · STATEWIDE DATA THROUGH AUG 2026
Oil by month
Barrels reported on Form PR for the whole lease. The latest months are revised upward as late reports arrive.
12 months through Aug 2026 7 · prior 12 5(+40%)
Gas by month
No gas reported in the last ten years. 13 mcf over the lease's record, last in Jul 1994.
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, with what it reported in them.
- Zaf OilJan 1993 → Jan 1993 · 1 mo1 bbl oil · 1 mcf gas
- Donoco Oil CompanyFeb 1993 → Nov 2026 · 406 mo309 bbl oil · 12 mcf gas
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
3
wells completed on the lease
- Producing
- 3
Operates them now
Newest permits
- — #2—
- — #3—
- — #4—
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 Aug 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-1-839, documented in the API reference.