LANGE, E.

Oil · District 01 · Lease #8131

Operator: XTO ENERGY INC.

Fields: A.W.P. (OLMOS)

Cum Oil

97k BBL

Cum Gas

926k MCF

casinghead

Wells

4

Production

1993-01 — 2026-03

Peak Month

1995-10

Production History

Cum Oil: 96,681 BBL Cum Gas: 925,719 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

897 BBL/mo

Di (annual)

29.6%

b-factor

0.8

EUR

85,870 BBL

R-squared

0.825

type

hyperbolic

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

1997-11 — 2001-11 DREYFUS, LOUIS NATURAL GAS CORP 49 mo

1993-01 — 1997-10 AMERICAN EXPLORATION COMPANY 58 mo

Wells (4)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
4	42-311-32867	XTO ENERGY INC.	1	10,300	1990-11-13
3	42-311-32773	XTO ENERGY INC.	1	10,500	1989-09-06
2	42-311-32211	XTO ENERGY INC.	1	10,100	1984-12-31
1	42-311-31705	XTO ENERGY INC.	1	9,900	1982-05-10