KELLY -A-

Oil · District 08 · Lease #21665

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

63k BBL

Cum Gas

136k MCF

casinghead

Wells

2

Production

1993-01 — 2024-04

Peak Month

2008-03

Production History

Cum Oil: 63,060 BBL Cum Gas: 135,705 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

508 BBL/mo

Di (annual)

24.4%

b-factor

0.9

EUR

60,164 BBL

R-squared

0.447

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 (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4PIONEER NATURAL RES. USA INC.210,1002007-09-17
142-317-30113PIONEER NATURAL RES. USA INC.------