DEEP ROCK ET AL -A-

Oil · District 08 · Lease #21679

Operator: MARALO, LLC

Cum Oil

236k BBL

Cum Gas

51k MCF

casinghead

Wells

4

Production

1993-01 — 2023-01

Peak Month

2017-09

Production History

Cum Oil: 236,075 BBL Cum Gas: 50,621 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,797 BBL/mo

Di (annual)

8.9%

b-factor

0.0

EUR

239,020 BBL

R-squared

0.516

type

exponential

Operator History (from monthly production reports)

2023-03 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 41 mo
2013-01 — 2023-02 LEGACY RESERVES OPERATING LP 122 mo
2004-12 — 2012-12 COG OPERATING LLC 97 mo
1999-01 — 2004-11 MARALO, LLC 71 mo
1993-01 — 1998-12 MARALO, INC. 72 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8SHIGHMARK ENERGY OPERATING LLC14,6001981-08-19
7 SHIGHMARK ENERGY OPERATING LLC14,6001981-07-02
1SHIGHMARK ENERGY OPERATING LLC24,7001981-03-05
342-003-03229HIGHMARK ENERGY OPERATING LLC------