O BRIEN,

Oil · District 10 · Lease #6267

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

543k BBL

Cum Gas

0 MCF

Wells

12

Production

1993-01 — 2026-03

Peak Month

2012-05

Production History

Cum Oil: 543,010 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

6,253 BBL/mo

Di (annual)

107.9%

b-factor

0.6

EUR

157,102 BBL

R-squared

0.794

type

hyperbolic

Wells (12)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
13PIONEER NATURAL RES. USA, INC.110,8002011-07-21
11PIONEER NATURAL RES. USA, INC.110,7752011-05-31
12PARKER & PARSLEY DEVELOPMENT L.P19,0001996-09-11
10MIDPAR L.P.19,3001995-01-13
9MIDPAR L.P.18,7001994-09-14
7MIDPAR L.P.18,8001994-03-21
8MIDPAR L.P.18,8001994-03-18
342-329-00049--------
61X42-329-00048--------
6342-329-00049--------
64W42-329-00061--------
6642-329-00063--------
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