ECHOLS "7"

Oil · District 10 · Lease #41504

Operator: THREE RIVERS OPERATING CO II LLC

Cum Oil

162k BBL

Cum Gas

0 MCF

Wells

4

Production

2011-05 — 2026-02

Peak Month

2012-10

Production History

Cum Oil: 161,663 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

2,843 BBL/mo

Di (annual)

30.0%

b-factor

0.2

EUR

141,690 BBL

R-squared

0.869

type

hyperbolic

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4PIONEER NATURAL RES. USA, INC.111,6002012-11-19
3PIONEER NATURAL RES. USA, INC.111,6002012-03-12
2PIONEER NATURAL RES. USA, INC.111,4002011-06-24
1PIONEER NATURAL RES. USA, INC.211,4002011-01-21
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