ATHENA '13-18'

Oil · District 08 · Lease #36679

Operator: XTO ENERGY INC.

Fields: MARSTON RANCH (DEVONIAN)

Cum Oil

19k BBL

Cum Gas

78k MCF

casinghead

Wells

1

Production

2001-06 — 2016-08

Peak Month

2003-08

Production History

Cum Oil: 18,742 BBL Cum Gas: 77,518 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

365 BBL/mo

Di (annual)

32.6%

b-factor

0.4

EUR

21,354 BBL

R-squared

0.680

type

hyperbolic

Operator History (from monthly production reports)

2016-09 — 2026-07 WILLIAMS OIL COMPANY 119 mo

2004-08 — 2016-08 XTO ENERGY INC. 145 mo

2002-06 — 2004-07 CHEVRON U. S. A. INC. 26 mo

2001-06 — 2002-05 TEXACO E & P INC. 12 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-475-34705	XTO ENERGY INC.	3	7,625	2016-12-30