DSPAIN -C-

Oil · District 10 · Lease #1428

Operator: STEPHENS & JOHNSON OPERATING CO.

Cum Oil

149k BBL

Cum Gas

216k MCF

casinghead

Wells

8

Production

1993-01 — 2026-04

Peak Month

2012-04

Production History

Cum Oil: 149,428 BBL Cum Gas: 216,470 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

883 BBL/mo

Di (annual)

9.3%

b-factor

0.0

EUR

112,403 BBL

R-squared

0.537

type

exponential

Operator History (from monthly production reports)

1994-05 — 2026-07 KELLERVILLE OPERATING, LLC 387 mo
1994-03 — 1994-04 SHEETS, JESS W. OIL COMPANY 2 mo
1993-09 — 1994-02 STEPHENS & JOHNSON OPERATING CO. 6 mo
1993-01 — 1993-08 S & J OPERATING CO. 8 mo

Wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
10KELLERVILLE OPERATING, LLC12,7002012-03-15
9KELLERVILLE OPERATING, LLC12,7002011-04-21
7KELLERVILLE OPERATING, LLC12,7002009-09-18
8KELLERVILLE OPERATING, LLC12,7002009-09-18
2KELLERVILLE OPERATING, LLC12,6501987-08-21
3KELLERVILLE OPERATING, LLC12,6001987-06-17
6KELLERVILLE OPERATING, LLC12,6001987-06-17
542-483-80759KELLERVILLE OPERATING, LLC------