SCHAEFER "A"

Oil · District 7B · Lease #28830

Operator: CALLARMAN, DAVID

Cum Oil

7k BBL

Cum Gas

7k MCF

casinghead

Wells

1

Production

2000-07 — 2026-04

Peak Month

2001-05

Production History

Cum Oil: 6,995 BBL Cum Gas: 7,437 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

92 BBL/mo

Di (annual)

197.9%

b-factor

0.6

EUR

1,172 BBL

R-squared

0.525

type

hyperbolic

Operator History (from monthly production reports)

2000-07 — 2026-07 CALLARMAN, DAVID 313 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1CALLARMAN, DAVID24,3501986-06-03