ERWIN -C-

Oil · District 08 · Lease #31954

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

249k BBL

Cum Gas

364k MCF

casinghead

Wells

6

Production

1993-01 — 2026-04

Peak Month

2007-08

Production History

Cum Oil: 249,489 BBL Cum Gas: 363,794 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,402 BBL/mo

Di (annual)

60.7%

b-factor

0.3

EUR

39,326 BBL

R-squared

0.360

type

hyperbolic

Operator History (from monthly production reports)

1997-09 — 2026-07 PIONEER NATURAL RES. USA, INC. 347 mo
1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo
1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3PIONEER NATURAL RES. USA, INC.110,0002006-03-15
5PIONEER NATURAL RES. USA, INC.110,0002006-03-15
9PIONEER NATURAL RES. USA, INC.110,0002006-03-15
2PIONEER NATURAL RES. USA, INC.29,0002005-05-12
4PIONEER NATURAL RES. USA, INC.19,0002005-05-12
1PIONEER NATURAL RES. USA, INC.18,8001988-05-31