ERWIN -A-

Oil · District 10 · Lease #25554

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

66k BBL

Cum Gas

0 MCF

Wells

2

Production

1993-01 — 2023-06

Peak Month

2005-11

Production History

Cum Oil: 65,916 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

688 BBL/mo

Di (annual)

36.3%

b-factor

1.3

EUR

83,035 BBL

R-squared

0.696

type

hyperbolic

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2PIONEER NATURAL RES. USA, INC.18,9502005-06-03
1COX, JOHN L.18,8001979-06-15
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