DEEP ROCK ETAL -A-

Oil · District 08 · Lease #1033

Operator: MARALO, LLC

Cum Oil

1.6M BBL

Cum Gas

161k MCF

casinghead

Wells

9

Production

1993-01 — 2026-04

Peak Month

2017-09

Production History

Cum Oil: 1,649,194 BBL Cum Gas: 161,215 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

9,550 BBL/mo

Di (annual)

5.2%

b-factor

0.0

EUR

2,027,643 BBL

R-squared

0.439

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 (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
11GHIGHMARK ENERGY OPERATING, LLC16,1002014-05-05
12GHIGHMARK ENERGY OPERATING, LLC16,1002014-05-05
10GHIGHMARK ENERGY OPERATING, LLC16,5002006-08-17
9GHIGHMARK ENERGY OPERATING, LLC16,5002006-02-23
142-003-03325HIGHMARK ENERGY OPERATING, LLC------
242-003-03327HIGHMARK ENERGY OPERATING, LLC------
342-003-03328HIGHMARK ENERGY OPERATING, LLC------
442-003-03329HIGHMARK ENERGY OPERATING, LLC------
542-003-03330HIGHMARK ENERGY OPERATING, LLC------