RICHEY SEC. 42 "A"

Oil · District 9 · Lease #8491

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

51k BBL

Cum Gas

0 MCF

Wells

9

Production

1993-01 — 2026-03

Peak Month

2007-03

Production History

Cum Oil: 51,451 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

858 BBL/mo

Di (annual)

46.1%

b-factor

0.2

EUR

27,785 BBL

R-squared

0.889

type

hyperbolic

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
13PIONEER NATURAL RES. USA, INC.17,5002006-08-31
9PIONEER NATURAL RES. USA, INC.17,4002006-04-20
10PIONEER NATURAL RES. USA, INC.17,4002006-04-19
7PIONEER NATURAL RES. USA, INC.17,3002005-11-18
8PIONEER NATURAL RES. USA, INC.17,4252005-11-10
4INDIAN WELLS OIL COMPANY17,4001981-02-18
3INDIAN WELLS OIL COMPANY17,4001980-11-05
2INDIAN WELLS OIL COMPANY17,3001980-02-05
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