< leases

FULTON-KING "A"

Oil · District 10 · Lease #4398

Operator: STEPHENS & JOHNSON OPERATING CO.

Fields: LAMBERT (GRANITE WASH, UP.)

Cum Oil

407k BBL

Cum Gas

38k MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

1993-08

Production History

Cum Oil: 406,778 BBL Cum Gas: 38,157 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,716 BBL/mo

Di (annual)

12.8%

b-factor

0.0

EUR

349,021 BBL

R-squared

0.844

type

exponential

Operator History (from monthly production reports)

2007-12 — 2026-07 STEPHENS & JOHNSON OPERATING CO. 224 mo
2005-07 — 2007-11 MEXTEX OPERATING COMPANY 29 mo
2001-12 — 2005-06 EXTEX OPERATING COMPANY 43 mo
1993-01 — 2001-11 RIO PETROLEUM, INC. 107 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
442-359-30104STEPHENS & JOHNSON OPERATING CO.17,3001979-06-19
342-359-30100STEPHENS & JOHNSON OPERATING CO.17,3001979-04-19
242-359-30099STEPHENS & JOHNSON OPERATING CO.27,5001979-03-21
142-359-30098STEPHENS & JOHNSON OPERATING CO.17,5001979-02-23