UNIVERSITY -K-

Oil · District 7C · Lease #461

Operator: MARATHON OIL COMPANY

Cum Oil

183k BBL

Cum Gas

311k MCF

casinghead

Wells

9

Production

1993-01 — 2026-04

Peak Month

2000-12

Production History

Cum Oil: 183,406 BBL Cum Gas: 311,101 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,636 BBL/mo

Di (annual)

15.7%

b-factor

0.0

EUR

125,083 BBL

R-squared

0.870

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 (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6EXTEX OPERATING COMPANY22,7502001-05-02
9EXTEX OPERATING COMPANY12,8001996-02-14
7EXTEX OPERATING COMPANY12,5001995-11-09
8EXTEX OPERATING COMPANY12,5001995-11-09
5EXTEX OPERATING COMPANY12,7501986-10-15
142-105-02321EXTEX OPERATING COMPANY------
242-105-02330EXTEX OPERATING COMPANY------
342-105-02340EXTEX OPERATING COMPANY------
442-105-02349EXTEX OPERATING COMPANY------