KEELAND OIL UNIT

Oil · District 03 · Lease #21825

Operator: TANA OIL AND GAS CORPORATION

Cum Oil

124k BBL

Cum Gas

288k MCF

casinghead

Wells

1

Production

1993-01 — 2008-12

Peak Month

1993-01

Production History

Cum Oil: 124,479 BBL Cum Gas: 288,303 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

9,390 BBL/mo

Di (annual)

104.9%

b-factor

0.3

EUR

153,270 BBL

R-squared

0.841

type

hyperbolic

Operator History (from monthly production reports)

2008-09 — 2012-05 ENERVEST OPERATING, L.L.C. 45 mo
1999-09 — 2008-08 EMERALD OPERATING COMPANY, INC. 108 mo
1995-11 — 1999-08 ROSEWOOD RESOURCES, INC. 46 mo
1993-01 — 1995-10 TANA OIL AND GAS CORPORATION 34 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2ENERVEST OPERATING L.L.C.29,8001992-10-02