LEASES · O-1-11378 · OIL · DISTRICT 01
Iltis, Mathilda
ReportingSimco Oil, LLC · Bexar County · Fairfield field
Iltis, Mathilda is an RRC oil lease (O-1-11378) in Bexar County operated by Simco Oil, LLC, with 5 wells completed on it.
It has reported 4.69K barrels of oil and 15 mcf of gas since January 1993, last reporting volume in February 2026 (statewide data runs through April 2026).
The last 12 reported months total 25 barrels of oil; the lease peaked at 127 barrels in February 1993.
8 operators have filed production on it, most recently Simco Oil, LLC since January 2014.
- 4.69K
- bbl oil, all reported
- 15
- mcf gas incl. casinghead
- 25
- bbl oil, last 12 reported
- —
- vs the 12 before
- 5
- wells completed on it
- 127
- peak month, bbl (Feb 1993)
PDQ LEASE REPORTS · FIRST JAN 1993 · LAST VOLUME FEB 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 25 · prior 12 78(-68%)
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 0 · prior 12 0
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.
- Shepherd Oil Co.Jan 1993 → Aug 1993 · 8 mo
- Rao Oil CompanySep 1993 → Oct 1994 · 14 mo
- Mobile Production Systems, Inc.Nov 1994 → Dec 1994 · 2 mo
- Ginco Operating Co.Jan 1995 → Dec 1997 · 36 mo
- LPG Energy CompanyJan 1998 → Apr 2005 · 88 mo
- Simpson, Michael JohnMay 2005 → May 2005 · 1 mo
- Simco OilJun 2005 → Dec 2013 · 103 mo
- Simco Oil, LLCJan 2014 → Jul 2026 · 151 mo
Wells on the lease
FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL
5
wells completed on the lease
- Producing
- 5
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-1-11378, documented in the API reference.