BUTCHEE "21"

Oil · District 10 · Lease #39147

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

477k BBL

Cum Gas

0 MCF

Wells

7

Production

2008-11 — 2026-03

Peak Month

2013-09

Production History

Cum Oil: 476,578 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

5,220 BBL/mo

Di (annual)

20.5%

b-factor

0.2

EUR

378,159 BBL

R-squared

0.818

type

hyperbolic

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7PIONEER NATURAL RES. USA, INC.111,7002013-06-19
4PIONEER NATURAL RES. USA, INC.111,9002012-11-14
8PIONEER NATURAL RES. USA, INC.111,8002012-07-31
6PIONEER NATURAL RES. USA, INC.112,0002011-11-22
3PIONEER NATURAL RES. USA, INC.111,1002011-01-10
2PIONEER NATURAL RES. USA, INC.111,3002010-06-16
1PIONEER NATURAL RES. USA, INC.19,8002008-06-28
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