NEAL UNIT

Oil · District 8A · Lease #69120

Operator: SCHALK OIL COMPANY, INC.

Cum Oil

122k BBL

Cum Gas

0 MCF

Wells

1

Production

2007-08 — 2026-04

Peak Month

2007-09

Production History

Cum Oil: 122,173 BBL Cum Gas: 0 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,075 BBL/mo

Di (annual)

9.6%

b-factor

0.0

EUR

133,887 BBL

R-squared

0.572

type

exponential

Operator History (from monthly production reports)

2007-08 — 2026-07 SCHALK OIL COMPANY, INC. 228 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SCHALK OIL COMPANY, INC.15,3002007-07-02