UNIVERSITY "9" -E-

Oil · District 08 · Lease #37378

Operator: XTO ENERGY INC.

Cum Oil

172k BBL

Cum Gas

174k MCF

casinghead

Wells

1

Production

2004-08 — 2008-12

Peak Month

2008-07

Production History

Cum Oil: 172,003 BBL Cum Gas: 174,402 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

5,832 BBL/mo

Di (annual)

87.7%

b-factor

2.0

EUR

671,784 BBL

R-squared

0.706

type

hyperbolic

Operator History (from monthly production reports)

2004-08 — 2009-04 XTO ENERGY INC. 57 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4XTO ENERGY INC.210,8002011-03-30