UNIVERSITY -I-

Oil · District 7C · Lease #459

Operator: MARATHON OIL COMPANY

Cum Oil

66k BBL

Cum Gas

300k MCF

casinghead

Wells

7

Production

1993-01 — 2026-04

Peak Month

1993-04

Production History

Cum Oil: 65,938 BBL Cum Gas: 300,258 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

333 BBL/mo

Di (annual)

7.3%

b-factor

0.0

EUR

53,295 BBL

R-squared

0.758

type

exponential

Operator History (from monthly production reports)

2021-02 — 2026-07 EXTEX OPERATING COMPANY 66 mo
2006-04 — 2021-01 LEGACY RESERVES OPERATING LP 178 mo
1999-11 — 2006-03 BROTHERS PRODUCTION COMPANY INC. 77 mo
1993-01 — 1999-10 MARATHON OIL COMPANY 82 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7EXTEX OPERATING COMPANY12,7501987-08-20
6EXTEX OPERATING COMPANY12,7501987-07-16
5EXTEX OPERATING COMPANY110,1031981-05-11
142-105-02319EXTEX OPERATING COMPANY------
242-105-03467EXTEX OPERATING COMPANY------
342-105-02338EXTEX OPERATING COMPANY------
442-105-02348EXTEX OPERATING COMPANY------