STATE OF TEXAS -DD-

Oil · District 08 · Lease #15220

Operator: XTO ENERGY INC.

Fields: BLOCK 9 (DEVONIAN)

Cum Oil

117k BBL

Cum Gas

929k MCF

casinghead

Wells

3

Production

1993-01 — 2026-04

Peak Month

2007-10

Production History

Cum Oil: 116,570 BBL Cum Gas: 928,804 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,624 BBL/mo

Di (annual)

87.7%

b-factor

1.2

EUR

104,670 BBL

R-squared

0.439

type

hyperbolic

Operator History (from monthly production reports)

2005-01 — 2026-07 XTO ENERGY INC. 259 mo

2002-03 — 2004-12 WESTPORT OIL AND GAS COMPANY, LP 34 mo

1998-09 — 2002-02 BELCO ENERGY CORP. 42 mo

1995-01 — 1998-08 CODA ENERGY, INC. 44 mo

1993-01 — 1994-12 TEXACO E & P INC. 24 mo

Wells (3)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1H	42-003-07426	XTO ENERGY INC.	2	11,300	2006-02-16
1 L	42-003-07426	XTO ENERGY INC.	2	11,300	2006-02-16
1 U	42-003-07426	XTO ENERGY INC.	2	11,300	2006-02-16