COOPER -O-

Oil · District 01 · Lease #11366

Operator: LANGLAND OIL, INC.

Fields: SOMERSET

Cum Oil

743 BBL

Cum Gas

26 MCF

casinghead

Wells

3

Production

1993-01 — 1998-05

Peak Month

1993-02

Production History

Cum Oil: 743 BBL Cum Gas: 26 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

33 BBL/mo

Di (annual)

41.6%

b-factor

0.0

EUR

935 BBL

R-squared

0.681

type

exponential

Operator History (from monthly production reports)

1997-01 — 2026-07 GREAT PLAINS RESOURCES, INC. 355 mo
1995-03 — 1996-12 GINCO OPERATING CO. 22 mo
1993-01 — 1995-02 LANGLAND OIL, INC. 26 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2GREAT PLAINS RESOURCES INC.12,0001985-07-24
3GREAT PLAINS RESOURCES INC.12,0001985-07-24
4GREAT PLAINS RESOURCES INC.12,0001985-07-24