HALL-STARK

Oil · District 09 · Lease #20964

Operator: STEPHENS & JOHNSON OPERATING CO.

Cum Oil

24k BBL

Cum Gas

193k MCF

casinghead

Wells

1

Production

1993-01 — 2025-11

Peak Month

1998-01

Production History

Cum Oil: 23,549 BBL Cum Gas: 193,273 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

104 BBL/mo

Di (annual)

4.9%

b-factor

0.0

EUR

23,219 BBL

R-squared

0.559

type

exponential

Operator History (from monthly production reports)

1993-09 — 2026-07 STEPHENS & JOHNSON OPERATING CO. 395 mo
1993-01 — 1993-08 S & J OPERATING CO. 8 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1CIRCLE SEVEN PRODUCTION CO.16,2001980-07-25