COOK "21"

Oil · District 10 · Lease #39126

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

341k BBL

Cum Gas

0 MCF

Wells

9

Production

2008-11 — 2026-03

Peak Month

2013-11

Production History

Cum Oil: 341,371 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

4,488 BBL/mo

Di (annual)

47.0%

b-factor

0.8

EUR

301,163 BBL

R-squared

0.709

type

hyperbolic

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8PIONEER NATURAL RES. USA, INC.111,7902013-07-16
7PIONEER NATURAL RES. USA, INC.111,8002012-10-24
5PIONEER NATURAL RES. USA, INC.111,9252012-08-15
6PIONEER NATURAL RES. USA, INC.111,0002012-03-07
4PIONEER NATURAL RES. USA, INC.210,8502011-03-04
3PIONEER NATURAL RES. USA, INC.111,0002010-11-03
1DPIONEER NATURAL RES. USA, INC.16,0002009-01-30
2PIONEER NATURAL RES. USA, INC.211,2002009-01-22
1PIONEER NATURAL RES. USA, INC.19,8002008-06-28
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