HILL - NEAL UNIT

Oil · District 8A · Lease #68637

Operator: SCHALK OIL COMPANY, INC.

Cum Oil

166k BBL

Cum Gas

16 MCF

casinghead

Wells

1

Production

2003-12 — 2026-04

Peak Month

2004-01

Production History

Cum Oil: 166,127 BBL Cum Gas: 16 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,860 BBL/mo

Di (annual)

14.5%

b-factor

0.0

EUR

153,971 BBL

R-squared

0.643

type

exponential

Operator History (from monthly production reports)

2003-12 — 2026-07 SCHALK OIL COMPANY, INC. 272 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SCHALK OIL COMPANY, INC.25,2002003-10-29