HOLZGRAF, ORA "B"

Oil · District 7C · Lease #17145

Operator: COG OPERATING LLC

Cum Oil

395k BBL

Cum Gas

1.3M MCF

casinghead

Wells

9

Production

2010-05 — 2026-04

Peak Month

2014-03

Production History

Cum Oil: 394,806 BBL Cum Gas: 1,324,732 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

5,257 BBL/mo

Di (annual)

80.5%

b-factor

1.7

EUR

529,793 BBL

R-squared

0.660

type

hyperbolic

Operator History (from monthly production reports)

2010-05 — 2026-07 COG OPERATING LLC 195 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5410COG OPERATING LLC112,0002012-02-22
5411COG OPERATING LLC212,0002012-02-22
5408COG OPERATING LLC211,0002010-10-22
5407COG OPERATING LLC210,9002007-10-09
5406COG OPERATING LLC110,8002007-04-02
5405COG OPERATING LLC110,5002004-05-12
5402COG OPERATING LLC210,3002003-10-13
5404COG OPERATING LLC210,7002003-08-05
5401COG OPERATING LLC110,6332003-02-13