UNIVERSITY "9" -D-

Oil · District 08 · Lease #10089

Operator: XTO ENERGY INC.

Cum Oil

1.2M BBL

Cum Gas

764k MCF

casinghead

Wells

10

Production

1993-01 — 2008-12

Peak Month

2006-03

Production History

Cum Oil: 1,188,588 BBL Cum Gas: 764,415 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

22,370 BBL/mo

Di (annual)

53.5%

b-factor

2.0

EUR

3,202,713 BBL

R-squared

0.696

type

hyperbolic

Operator History (from monthly production reports)

2001-06 — 2009-04 XTO ENERGY INC. 95 mo
1993-01 — 2001-05 CROSS TIMBERS OPERATING COMPANY 101 mo

Wells (10)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5XTO ENERGY INC.615,0002023-09-05
5HXTO ENERGY INC.615,0002023-09-05
7XTO ENERGY INC.311,5002022-03-16
7HXTO ENERGY INC.311,5002022-03-16
6XTO ENERGY INC.612,2002010-05-18
6HXTO ENERGY INC.612,2002010-05-18
6HRXTO ENERGY INC.612,2002010-05-18
1XTO ENERGY INC.310,4502004-05-12
1HXTO ENERGY INC.310,4502004-05-12
1 LXTO ENERGY INC.310,4502004-05-12