MARY HELEN UNIT

Oil · District 3 · Lease #14976

Operator: U. S. OPERATING, INC.

Cum Oil

141k BBL

Cum Gas

0 MCF

Wells

5

Production

1993-01 — 2026-03

Peak Month

2004-12

Production History

Cum Oil: 141,390 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

3,444 BBL/mo

Di (annual)

89.8%

b-factor

0.5

EUR

88,128 BBL

R-squared

0.858

type

hyperbolic

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4REU. S. OPERATING, INC.29,3002004-07-21
3U. S. OPERATING, INC.39,4002004-07-14
3REU. S. OPERATING, INC.39,4002004-07-14
2U. S. OPERATING, INC.39,3002001-03-14
2REU. S. OPERATING, INC.39,3002001-03-14
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