WINDHAM "E"

Oil · District 7C · Lease #11810

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

173k BBL

Cum Gas

575k MCF

casinghead

Wells

4

Production

1993-01 — 2023-03

Peak Month

2010-05

Production History

Cum Oil: 173,240 BBL Cum Gas: 575,261 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,516 BBL/mo

Di (annual)

32.9%

b-factor

0.2

EUR

114,477 BBL

R-squared

0.885

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 (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4PIONEER NATURAL RES. USA INC.111,3002009-11-17
3PIONEER NATURAL RES. USA INC.211,3002009-09-16
1PIONEER NATURAL RES. USA INC.19,2001985-12-31
2PIONEER NATURAL RES. USA INC.19,2001985-12-27