WINSLOW "A"

Oil · District 08 · Lease #40971

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

87k BBL

Cum Gas

306k MCF

casinghead

Wells

2

Production

2010-11 — 2025-10

Peak Month

2012-10

Production History

Cum Oil: 87,253 BBL Cum Gas: 306,206 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

3,371 BBL/mo

Di (annual)

106.8%

b-factor

0.6

EUR

85,504 BBL

R-squared

0.873

type

hyperbolic

Operator History (from monthly production reports)

2010-11 — 2026-07 PIONEER NATURAL RES. USA, INC. 189 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2PIONEER NATURAL RES. USA INC.111,3002012-02-24
1PIONEER NATURAL RES. USA INC.110,5002010-03-11