EDWARDS 12

Oil · District 08 · Lease #34435

Operator: COSTILLA PETROLEUM CORPORATION

Cum Oil

29k BBL

Cum Gas

20k MCF

casinghead

Wells

1

Production

1995-02 — 1999-07

Peak Month

1995-05

Production History

Cum Oil: 28,832 BBL Cum Gas: 20,012 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,309 BBL/mo

Di (annual)

182.5%

b-factor

0.3

EUR

21,623 BBL

R-squared

0.892

type

hyperbolic

Operator History (from monthly production reports)

1998-12 — 2000-01 CONCHO RESOURCES INC. 14 mo
1997-02 — 1998-11 COSTILLA ENERGY, INC. 22 mo
1995-02 — 1997-01 COSTILLA PETROLEUM CORPORATION 24 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1CONCHO RESOURCES INC.29,5001996-05-24