HOLZGRAF 22

Oil · District 10 · Lease #37005

Operator: DISCOVERY OPERATING, INC.

Cum Oil

559k BBL

Cum Gas

0 MCF

Wells

10

Production

2003-02 — 2026-03

Peak Month

2004-01

Production History

Cum Oil: 559,423 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

7,079 BBL/mo

Di (annual)

42.3%

b-factor

1.0

EUR

622,335 BBL

R-squared

0.877

type

hyperbolic

Wells (10)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9DISCOVERY OPERATING, INC.110,6002010-02-24
7RDISCOVERY OPERATING, INC.110,6002004-12-03
8DISCOVERY OPERATING, INC.110,6002004-07-27
7DISCOVERY OPERATING, INC.110,6002004-05-11
6DISCOVERY OPERATING, INC.110,6002004-01-08
5DISCOVERY OPERATING, INC.110,6002003-10-29
2DISCOVERY OPERATING, INC.110,6002003-02-14
3DISCOVERY OPERATING, INC.110,6002003-02-14
4DISCOVERY OPERATING, INC.110,6002003-02-14
1DISCOVERY OPERATING, INC.110,6002002-10-31
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