AMACKER 66J

Oil · District 7C · Lease #21397

Operator: COG OPERATING LLC

Cum Oil

402k BBL

Cum Gas

1.1M MCF

casinghead

Wells

1

Production

2021-09 — 2026-04

Peak Month

2022-01

Production History

Cum Oil: 401,887 BBL Cum Gas: 1,064,595 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

33,496 BBL/mo

Di (annual)

432.1%

b-factor

1.0

EUR

501,508 BBL

R-squared

0.857

type

hyperbolic

Operator History (from monthly production reports)

2021-09 — 2026-07 COG OPERATING LLC 59 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6621CHCOG OPERATING LLC212,0002020-02-03