SHACKELFORD "44" "A"

Oil · District 08 · Lease #33173

Operator: XTO ENERGY INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

60k BBL

Cum Gas

446k MCF

casinghead

Wells

1

Production

1993-01 — 2010-10

Peak Month

1993-03

Production History

Cum Oil: 59,706 BBL Cum Gas: 445,678 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,592 BBL/mo

Di (annual)

54.1%

b-factor

0.4

EUR

57,467 BBL

R-squared

0.931

type

hyperbolic

Operator History (from monthly production reports)

2014-08 — 2017-07 XTO ENERGY INC. 36 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 (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-329-32378	XTO ENERGY INC.	1	8,600	1991-02-20