UNIVERSITY -A-

Oil · District 08 · Lease #12230

Operator: STEPHENS & JOHNSON OPERATING CO.

Cum Oil

230k BBL

Cum Gas

340k MCF

casinghead

Wells

5

Production

1993-01 — 2026-04

Peak Month

1995-10

Production History

Cum Oil: 230,477 BBL Cum Gas: 339,844 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,017 BBL/mo

Di (annual)

4.3%

b-factor

0.0

EUR

250,223 BBL

R-squared

0.766

type

exponential

Operator History (from monthly production reports)

2004-03 — 2026-07 STEPHENS & JOHNSON OPERATING CO. 269 mo
2001-04 — 2004-02 ICA ENERGY OPERATING, L.L.C. 35 mo
2000-03 — 2001-03 3TEC ENERGY CORPORATION 13 mo
1995-02 — 2000-02 FLOYD OPERATING COMPANY 61 mo
1993-01 — 1995-01 CONOCO INC. 25 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8STEPHENS & JOHNSON OPERATING CO.17,2501985-12-23
11STEPHENS & JOHNSON OPERATING CO.17,2501985-11-20
10STEPHENS & JOHNSON OPERATING CO.17,2001985-03-06
542-003-00280STEPHENS & JOHNSON OPERATING CO.------
742-003-00284STEPHENS & JOHNSON OPERATING CO.------