ORSON "4"

Oil · District 08 · Lease #38765

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

142k BBL

Cum Gas

239k MCF

casinghead

Wells

2

Production

2007-12 — 2025-08

Peak Month

2012-01

Production History

Cum Oil: 141,660 BBL Cum Gas: 239,073 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,233 BBL/mo

Di (annual)

27.5%

b-factor

0.3

EUR

136,184 BBL

R-squared

0.632

type

hyperbolic

Operator History (from monthly production reports)

2007-12 — 2026-07 PIONEER NATURAL RES. USA, INC. 224 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PIONEER NATURAL RES. USA INC.111,3502011-08-02
2PIONEER NATURAL RES. USA INC.110,5002007-08-24