ERWIN -A-

Oil · District 08 · Lease #25554

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

66k BBL

Cum Gas

131k MCF

casinghead

Wells

2

Production

1993-01 — 2020-08

Peak Month

2005-11

Production History

Cum Oil: 65,916 BBL Cum Gas: 130,583 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

688 BBL/mo

Di (annual)

36.3%

b-factor

1.3

EUR

83,035 BBL

R-squared

0.696

type

hyperbolic

Operator History (from monthly production reports)

1997-09 — 2023-06 PIONEER NATURAL RES. USA, INC. 310 mo
1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo
1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2PIONEER NATURAL RES. USA INC.18,9502005-06-03
1PIONEER NATURAL RES. USA INC.18,8001979-06-15