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LEASES · O-1-12706 · OIL · DISTRICT 01

Big Irby Mainvein

No volume since Sep 2007

Zorra Oil & Gas · Frio County · Pearsall (Austin Chalk) field

Big Irby Mainvein is an RRC oil lease (O-1-12706) in Frio County operated by Zorra Oil & Gas, with 2 wells completed on it.

It has reported 12.4K barrels of oil and 10 mcf of gas since January 1993, last reporting volume in September 2007 (statewide data runs through April 2026).

The last 12 reported months total 1.24K barrels of oil, down 39% on the year before; the lease peaked at 797 barrels in November 2005.

4 operators have filed production on it, most recently Zorra Oil & Gas since March 2005.

12.4K
bbl oil, all reported
10
mcf gas incl. casinghead
1.24K
bbl oil, last 12 reported
-39%
vs the 12 before
2
wells completed on it
797
peak month, bbl (Nov 2005)

PDQ LEASE REPORTS · FIRST JAN 1993 · LAST VOLUME SEP 2007 · 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 1,239 · prior 12 2,034(-39%)

05001K1999200020012002200320042005200620072008

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

011999200020012002200320042005200620072008

Who reported it

Each run of months one operator filed the production report, oldest first.

  1. Nijean, Inc.Jan 1993 → Nov 1994 · 23 mo
  2. Pearsall Energy Group, Inc.Dec 1994 → Feb 1995 · 3 mo
  3. Ginco Operating Co.Mar 1995 → Feb 2005 · 120 mo
  4. Zorra Oil & GasMar 2005 → Feb 2008 · 36 mo

Wells on the lease

FROM COMPLETION REPORTS · PRODUCTION ABOVE IS THEIR TOTAL

2

wells completed on the lease

Plugged
2

Operates them now

Aresco Operating LLC
2

Newest permits

All 2 wells, searchable →

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-1-12706, documented in the API reference.