COOK -A-, SECTION 81

Oil · District 7B · Lease #9183

Operator: YOUNG, MARSHALL R., OIL CO.

Fields: COOK RANCH

Cum Oil

56k BBL

Cum Gas

21 MCF

casinghead

Wells

5

Production

1993-01 — 2026-04

Peak Month

1997-03

Production History

Cum Oil: 55,561 BBL Cum Gas: 21 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

194 BBL/mo

Di (annual)

4.2%

b-factor

0.0

EUR

48,366 BBL

R-squared

0.400

type

exponential

Operator History (from monthly production reports)

2011-05 — 2026-07 STASNEY WELL SERVICE, LLC 183 mo
1998-11 — 2011-04 STASNEY, H. R. & SONS, LTD. 150 mo
1993-01 — 1998-10 YOUNG, MARSHALL R., OIL CO. 70 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7WSTASNEY WELL SERVICE, LLC11,5002005-05-16
13STASNEY WELL SERVICE, LLC15,5001985-02-20
12STASNEY WELL SERVICE, LLC11,3001984-12-11
842-417-82763STASNEY WELL SERVICE, LLC------
942-417-30749STASNEY WELL SERVICE, LLC------