ROCKER B -A-

Oil · District 7C · Lease #4475

Operator: JM COX RESOURCES, L.P.

Cum Oil

64k BBL

Cum Gas

1.4M MCF

casinghead

Wells

6

Production

1993-01 — 2022-08

Peak Month

1993-01

Production History

Cum Oil: 64,250 BBL Cum Gas: 1,444,904 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

409 BBL/mo

Di (annual)

12.4%

b-factor

0.4

EUR

55,690 BBL

R-squared

0.598

type

hyperbolic

Operator History (from monthly production reports)

2018-08 — 2026-07 DISCOVERY NATURAL RESOURCES LLC 96 mo
2003-10 — 2018-07 JM COX RESOURCES, L.P. 178 mo
1993-11 — 2003-09 COX, JOHN L. 119 mo
1993-01 — 1993-10 GRAHAM ROYALTY, LTD. 10 mo

Wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7DISCOVERY NATURAL RESOURCES LLC17,4001991-08-20
6DISCOVERY NATURAL RESOURCES LLC17,4001984-10-19
5DISCOVERY NATURAL RESOURCES LLC17,3001984-04-30
4DISCOVERY NATURAL RESOURCES LLC17,5001979-11-26
142-383-10060DISCOVERY NATURAL RESOURCES LLC------
342-383-10065DISCOVERY NATURAL RESOURCES LLC------