TRUST "139" LEASE

Oil · District 7B · Lease #28691

Operator: VAN OPERATING, LTD.

Cum Oil

17k BBL

Cum Gas

31k MCF

casinghead

Wells

1

Production

1999-10 — 2002-12

Peak Month

2000-03

Production History

Cum Oil: 17,407 BBL Cum Gas: 30,673 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,778 BBL/mo

Di (annual)

562.4%

b-factor

0.5

EUR

11,738 BBL

R-squared

0.823

type

hyperbolic

Operator History (from monthly production reports)

1999-10 — 2004-04 VAN OPERATING, LTD. 55 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1VAN OPERATING LTD.35,0001999-10-21