< leases

JOHNSTON STATE -A-

Oil · District 08 · Lease #33109

Operator: VANGUARD OPERATING, LLC

Fields: GW (ELLENBURGER)

Cum Oil

77k BBL

Cum Gas

4k MCF

casinghead

Wells

1

Production

1993-01 — 2026-04

Peak Month

2021-10

Production History

Cum Oil: 76,505 BBL Cum Gas: 3,763 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

519 BBL/mo

Di (annual)

10.1%

b-factor

0.3

EUR

77,642 BBL

R-squared

0.728

type

hyperbolic

Operator History (from monthly production reports)

2021-08 — 2026-07 TOC ENERGY RESOURCES, LLC 60 mo
2021-02 — 2021-07 CONTANGO RESOURCES, INC. 6 mo
2019-09 — 2021-01 GRIZZLY OP OF DELAWARE, LLC 17 mo
2015-11 — 2019-08 VANGUARD OPERATING, LLC 46 mo
2008-05 — 2015-10 EAGLE ROCK OPERATING COMPANY,LLC 90 mo
2005-03 — 2008-04 STANOLIND OPERATING CORP. 38 mo
1996-03 — 2005-02 THREE-B OIL COMPANY, THE 108 mo
1993-01 — 1996-02 THOMAS, J. C. INC. 38 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
242-371-36275TOC ENERGY RESOURCES, LLC15,9001990-09-18