COX "B"

Oil · District 08 · Lease #35401

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

14k BBL

Cum Gas

249k MCF

casinghead

Wells

1

Production

1997-07 — 2008-08

Peak Month

1997-07

Production History

Cum Oil: 14,125 BBL Cum Gas: 248,608 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,776 BBL/mo

Di (annual)

173.9%

b-factor

0.2

EUR

15,302 BBL

R-squared

0.745

type

hyperbolic

Operator History (from monthly production reports)

1997-09 — 2012-02 PIONEER NATURAL RES. USA, INC. 174 mo
1997-07 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 2 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3PIONEER NATURAL RES. USA, INC.17,0051997-07-03