UL 4

Oil · District 08 · Lease #40790

Operator: WINDSOR PERMIAN LLC

Cum Oil

30k BBL

Cum Gas

45k MCF

casinghead

Wells

1

Production

2010-08 — 2013-05

Peak Month

2011-06

Production History

Cum Oil: 30,104 BBL Cum Gas: 44,584 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,353 BBL/mo

Di (annual)

42.2%

b-factor

0.0

EUR

38,390 BBL

R-squared

0.535

type

exponential

Operator History (from monthly production reports)

2012-07 — 2013-09 DIAMONDBACK E&P LLC 15 mo
2010-08 — 2012-06 WINDSOR PERMIAN LLC 23 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
10DIAMONDBACK E&P LLC210,9002011-08-09