BLALOCK A

Oil · District 08 · Lease #39750

Operator: XTO ENERGY INC.

Fields: SPRABERRY (TREND AREA)

Cum Oil

102k BBL

Cum Gas

480k MCF

casinghead

Wells

4

Production

2009-10 — 2026-04

Peak Month

2014-05

Production History

Cum Oil: 102,140 BBL Cum Gas: 480,417 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,265 BBL/mo

Di (annual)

26.1%

b-factor

0.0

EUR

58,143 BBL

R-squared

0.446

type

exponential

Operator History (from monthly production reports)

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

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

2011-03 — 2014-06 BERRY OIL COMP. 40 mo

2009-10 — 2011-02 PIEDRA OPERATING, LLC 17 mo

Wells (4)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
4814	42-173-35092	XTO ENERGY INC.	1	12,000	2012-07-10
4802	42-173-33892	XTO ENERGY INC.	2	11,500	2012-03-05
4803	42-173-34673	XTO ENERGY INC.	1	12,000	2011-12-21
4811	42-173-33538	XTO ENERGY INC.	1	11,000	2009-08-03