WILLIAMS -A-

Oil · District 08 · Lease #21666

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

60k BBL

Cum Gas

108k MCF

casinghead

Wells

3

Production

1993-01 — 2024-03

Peak Month

2004-06

Production History

Cum Oil: 59,946 BBL Cum Gas: 108,051 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

747 BBL/mo

Di (annual)

18.3%

b-factor

0.2

EUR

60,131 BBL

R-squared

0.843

type

hyperbolic

Operator History (from monthly production reports)

1997-09 — 2026-03 PIONEER NATURAL RES. USA, INC. 343 mo
1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo
1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3PIONEER NATURAL RES. USA INC.110,0002003-08-21
142-317-30125PIONEER NATURAL RES. USA INC.------
242-317-30185PIONEER NATURAL RES. USA INC.------