UNIVERSITY -Z-

Oil · District 7C · Lease #466

Operator: MARATHON OIL COMPANY

Cum Oil

207k BBL

Cum Gas

352k MCF

casinghead

Wells

10

Production

1993-01 — 2026-04

Peak Month

2000-11

Production History

Cum Oil: 207,100 BBL Cum Gas: 351,979 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,736 BBL/mo

Di (annual)

16.0%

b-factor

0.3

EUR

175,693 BBL

R-squared

0.744

type

hyperbolic

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 (10)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9EXTEX OPERATING COMPANY32,8001996-04-08
10EXTEX OPERATING COMPANY12,5001995-12-04
6EXTEX OPERATING COMPANY12,7501987-07-16
7EXTEX OPERATING COMPANY12,7501987-07-16
8EXTEX OPERATING COMPANY12,7501987-07-16
5EXTEX OPERATING COMPANY12,7501986-10-15
142-105-02328EXTEX OPERATING COMPANY------
242-105-02337EXTEX OPERATING COMPANY------
342-105-02347EXTEX OPERATING COMPANY------
442-105-02356EXTEX OPERATING COMPANY------