BIRKHEAD "A"

Oil · District 10 · Lease #33021

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

41k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 2021-01

Peak Month

1993-04

Production History

Cum Oil: 40,513 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

203 BBL/mo

Di (annual)

3.9%

b-factor

0.2

EUR

56,925 BBL

R-squared

0.585

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PARKER & PARSLEY, LTD.19,5001991-01-04
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