< leases

ROBERTSON CSL

Oil · District 7B · Lease #16479

Operator: STEPHENS & JOHNSON OPERATING CO.

Fields: ABBOTT (MARBLE FALLS)

Cum Oil

23k BBL

Cum Gas

199k MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

1997-04

Production History

Cum Oil: 22,770 BBL Cum Gas: 199,093 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

136 BBL/mo

Di (annual)

8.4%

b-factor

0.0

EUR

19,174 BBL

R-squared

0.419

type

exponential

Operator History (from monthly production reports)

1993-09 — 2026-07 STEPHENS & JOHNSON OPERATING CO. 395 mo
1993-02 — 1993-08 S & J OPERATING CO. 7 mo
1993-01 — 1993-01 ORYX ENERGY COMPANY 1 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1942-133-37700STEPHENS & JOHNSON OPERATING CO.14,0001995-05-04
1642-133-36033STEPHENS & JOHNSON OPERATING CO.13,7501984-08-21
6 L42-133-32468STEPHENS & JOHNSON OPERATING CO.13,8001980-08-07
6U42-133-32468STEPHENS & JOHNSON OPERATING CO.13,8001980-08-07