ROBINSON UNIT

Oil · District 8A · Lease #68594

Operator: SCHALK OIL COMPANY, INC.

Cum Oil

96k BBL

Cum Gas

21 MCF

casinghead

Wells

1

Production

2003-07 — 2019-01

Peak Month

2004-01

Production History

Cum Oil: 96,186 BBL Cum Gas: 21 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,425 BBL/mo

Di (annual)

50.1%

b-factor

0.2

EUR

72,479 BBL

R-squared

0.871

type

hyperbolic

Operator History (from monthly production reports)

2003-07 — 2023-07 SCHALK OIL COMPANY, INC. 241 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SCHALK OIL COMPANY INC.15,3002003-05-19