HERZOG -A-

Oil · District 08 · Lease #25860

Operator: XTO ENERGY INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

104k BBL

Cum Gas

243k MCF

casinghead

Wells

2

Production

1993-01 — 2026-04

Peak Month

2010-06

Production History

Cum Oil: 104,486 BBL Cum Gas: 242,987 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,665 BBL/mo

Di (annual)

48.0%

b-factor

0.5

EUR

76,899 BBL

R-squared

0.600

type

hyperbolic

Operator History (from monthly production reports)

2014-11 — 2026-07 XTO ENERGY INC. 141 mo

2014-07 — 2014-10 LINN OPERATING, INC. 4 mo

2010-03 — 2014-06 BERRY OIL COMP. 52 mo

2008-01 — 2010-02 MERITAGE ENERGY COMPANY, LLC 26 mo

1993-07 — 2007-12 KAISER-FRANCIS OIL COMPANY 174 mo

1993-01 — 1993-06 MGF OIL CORPORATION 6 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2	42-317-35719	XTO ENERGY INC.	2	10,450	2009-12-11
1	42-317-32127	XTO ENERGY INC.	1	9,500	1979-12-04