KEYSTONE MILLS

Oil · District 03 · Lease #25398

Operator: WAPITI OPERATING, LLC

Cum Oil

74k BBL

Cum Gas

163k MCF

casinghead

Wells

1

Production

2009-05 — 2026-04

Peak Month

2009-08

Production History

Cum Oil: 74,154 BBL Cum Gas: 162,592 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

836 BBL/mo

Di (annual)

14.7%

b-factor

0.0

EUR

68,234 BBL

R-squared

0.357

type

exponential

Operator History (from monthly production reports)

2024-11 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 21 mo
2010-01 — 2024-10 DENBURY ONSHORE, LLC 178 mo
2009-05 — 2009-12 WAPITI OPERATING, LLC 8 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
40HIGHMARK ENERGY OPERATING, LLC212,0002001-05-25