TERRY COUNTY SCHOOL LAND

Oil · District 8A · Lease #65371

Operator: XTO ENERGY INC.

Fields: CHAMPMON (DEV.)

Cum Oil

811k BBL

Cum Gas

5k MCF

casinghead

Wells

3

Production

1993-01 — 2026-04

Peak Month

2005-01

Production History

Cum Oil: 811,351 BBL Cum Gas: 4,681 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,835 BBL/mo

Di (annual)

5.1%

b-factor

0.0

EUR

611,378 BBL

R-squared

0.622

type

exponential

Operator History (from monthly production reports)

2022-08 — 2026-07 UTOCO, LTD. 48 mo

2022-03 — 2022-07 HALVEY ENERGY, LLC 5 mo

2004-05 — 2022-02 XTO ENERGY INC. 214 mo

2000-04 — 2004-04 EXXON MOBIL CORPORATION 49 mo

1993-01 — 2000-03 EXXON CORP. 87 mo

Wells (3)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2	42-165-33301	UTOCO, LTD.	1	12,850	1985-06-26
3	42-165-33300	UTOCO, LTD.	1	12,850	1985-06-26
1	42-165-33203	UTOCO, LTD.	1	12,850	1985-03-25