COWDEN "E"

Oil · District 08 · Lease #35629

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

15k BBL

Cum Gas

174k MCF

casinghead

Wells

1

Production

1997-10 — 2012-01

Peak Month

1997-12

Production History

Cum Oil: 15,177 BBL Cum Gas: 173,753 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

354 BBL/mo

Di (annual)

55.5%

b-factor

0.7

EUR

18,501 BBL

R-squared

0.818

type

hyperbolic

Operator History (from monthly production reports)

1997-10 — 2013-06 PIONEER NATURAL RES. USA, INC. 189 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PIONEER NATURAL RES. USA INC.19,2501997-05-13