SHACKELFORD "44"

Oil · District 08 · Lease #33194

Operator: XTO ENERGY INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

68k BBL

Cum Gas

543k MCF

casinghead

Wells

2

Production

1993-01 — 2014-03

Peak Month

1997-01

Production History

Cum Oil: 67,819 BBL Cum Gas: 543,084 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,086 BBL/mo

Di (annual)

28.1%

b-factor

0.3

EUR

64,773 BBL

R-squared

0.846

type

hyperbolic

Operator History (from monthly production reports)

2014-08 — 2025-09 XTO ENERGY INC. 134 mo

2014-07 — 2014-07 LINN OPERATING, INC. 1 mo

2010-04 — 2014-06 BERRY OIL COMP. 51 mo

2007-11 — 2010-03 DACOTT OIL & GAS, LLC 29 mo

2001-09 — 2007-10 DEAN ENERGY, INC. 74 mo

2000-02 — 2001-08 RIM OPERATING, INC. 19 mo

1993-01 — 2000-01 PLAINS PETROLEUM OPERATING CO. 85 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2	42-329-32380	XTO ENERGY INC.	1	8,600	1991-02-20
3	42-329-32379	XTO ENERGY INC.	1	8,600	1991-02-20