COOK 21

Oil · District 08 · Lease #40475

Operator: MARINER ENERGY, INC.

Cum Oil

1.2M BBL

Cum Gas

3.4M MCF

casinghead

Wells

20

Production

2010-08 — 2026-04

Peak Month

2012-09

Production History

Cum Oil: 1,219,763 BBL Cum Gas: 3,361,181 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

33,819 BBL/mo

Di (annual)

75.9%

b-factor

0.5

EUR

1,015,785 BBL

R-squared

0.922

type

hyperbolic

Operator History (from monthly production reports)

2010-12 — 2026-07 APACHE CORPORATION 188 mo
2010-08 — 2010-11 MARINER ENERGY, INC. 4 mo

Wells (20)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
17APACHE CORPORATION311,0002017-08-21
20APACHE CORPORATION111,0002013-07-09
18APACHE CORPORATION111,0002013-07-03
19APACHE CORPORATION111,0002013-06-04
10APACHE CORPORATION311,0002012-04-27
15APACHE CORPORATION311,0002012-04-06
16APACHE CORPORATION211,0002012-04-05
12APACHE CORPORATION211,0002011-11-18
14APACHE CORPORATION211,0002011-11-18
13APACHE CORPORATION211,0002011-11-17
11APACHE CORPORATION211,0002011-11-03
8APACHE CORPORATION111,0002011-09-23
9APACHE CORPORATION111,0002011-09-09
7APACHE CORPORATION111,0002011-08-03
6APACHE CORPORATION111,0002011-06-23
5APACHE CORPORATION111,0002011-06-16
1APACHE CORPORATION211,0002011-05-05
2APACHE CORPORATION211,0002010-05-27
3APACHE CORPORATION311,0002010-05-27
4APACHE CORPORATION211,0002010-05-27