SHANNON, J. M., EST. -A-

Oil · District 7C · Lease #2327

Operator: ZEPHYR LONE STAR OPER CO.,L.L.C.

Cum Oil

48k BBL

Cum Gas

22 MCF

casinghead

Wells

12

Production

1993-01 — 2009-06

Peak Month

2005-07

Production History

Cum Oil: 48,015 BBL Cum Gas: 22 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

978 BBL/mo

Di (annual)

69.7%

b-factor

0.0

EUR

16,823 BBL

R-squared

0.508

type

exponential

Operator History (from monthly production reports)

2005-02 — 2018-07 SUNDOWN ENERGY LP 162 mo
2003-01 — 2005-01 SUNDOWN ENERGY, INC. 25 mo
2002-12 — 2002-12 ZEPHYR LONE STAR OPER CO.,L.L.C. 1 mo
1994-05 — 2002-11 ENERGY PRODUCTION CORPORATION 103 mo
1993-01 — 1994-04 TEXCAL RESOURCES, INC. 16 mo

Wells (12)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6CLARK OIL CO.12,5282005-07-25
6WCLARK OIL CO.12,5282005-07-25
1CLARK OIL CO.12,6002004-08-12
9CLARK OIL CO.12,6002004-08-12
1042-105-02844CLARK OIL CO.------
1142-105-02846CLARK OIL CO.------
242-105-03225CLARK OIL CO.------
342-105-03228CLARK OIL CO.------
442-105-03230CLARK OIL CO.------
542-105-03231CLARK OIL CO.------
742-105-03233CLARK OIL CO.------
842-105-02840CLARK OIL CO.------