GRINDSTAFF

Oil · District 7C · Lease #12875

Operator: XERIC OIL & GAS CORPORATION

Cum Oil

12k BBL

Cum Gas

10k MCF

casinghead

Wells

3

Production

1993-01 — 2002-01

Peak Month

1993-01

Production History

Cum Oil: 11,992 BBL Cum Gas: 9,629 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

299 BBL/mo

Di (annual)

70.8%

b-factor

1.1

EUR

20,213 BBL

R-squared

0.351

type

hyperbolic

Operator History (from monthly production reports)

2002-10 — 2003-09 DELTEX MINERALS INC. 12 mo
2002-09 — 2002-09 EDMONDSON, H. B. & SON 1 mo
1996-11 — 2002-08 CHEETAH INVESTMENTS, INC. 70 mo
1994-08 — 1996-10 XERIC OIL & GAS CORPORATION 27 mo
1993-01 — 1994-07 FINLAY ENERGY, INC. 19 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6DELTEX MINERALS INC.24,3002003-08-08
5DELTEX MINERALS INC.24,3001993-06-09
43-D OIL & GAS54,4501990-10-22