FOSTER -A-

Oil · District 01 · Lease #9521

Operator: XTO ENERGY INC.

Fields: A.W.P. (OLMOS)

Cum Oil

81k BBL

Cum Gas

1.3M MCF

casinghead

Wells

2

Production

1993-01 — 2026-04

Peak Month

1995-05

Production History

Cum Oil: 80,725 BBL Cum Gas: 1,315,836 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

395 BBL/mo

Di (annual)

6.1%

b-factor

0.0

EUR

74,549 BBL

R-squared

0.391

type

exponential

Operator History (from monthly production reports)

2007-08 — 2026-07 XTO ENERGY INC. 228 mo

2001-12 — 2007-07 DOMINION OKLAHOMA TEXAS E&P, INC 68 mo

1993-02 — 2001-11 DREYFUS, LOUIS NATURAL GAS CORP 106 mo

1993-01 — 1993-01 DEKALB ENERGY COMPANY 1 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2A	42-311-31984	XTO ENERGY INC.	1	9,650	1984-01-13
1A	42-311-31247	XTO ENERGY INC.	2	12,200	1979-12-11