NEAL RANCH '77' A UNIT

Oil · District 7C · Lease #18854

Operator: COG OPERATING LLC

Cum Oil

248k BBL

Cum Gas

1.4M MCF

casinghead

Wells

1

Production

2015-01 — 2026-04

Peak Month

2015-05

Production History

Cum Oil: 248,074 BBL Cum Gas: 1,370,456 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

4,294 BBL/mo

Di (annual)

43.7%

b-factor

0.5

EUR

215,858 BBL

R-squared

0.501

type

hyperbolic

Operator History (from monthly production reports)

2015-01 — 2026-07 COG OPERATING LLC 139 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
28HCOG OPERATING LLC115,0002014-06-11