HERZOG "9"

Oil · District 08 · Lease #39475

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

20k BBL

Cum Gas

40k MCF

casinghead

Wells

1

Production

2008-12 — 2020-05

Peak Month

2009-06

Production History

Cum Oil: 20,288 BBL Cum Gas: 40,438 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

452 BBL/mo

Di (annual)

55.2%

b-factor

0.9

EUR

29,772 BBL

R-squared

0.620

type

hyperbolic

Operator History (from monthly production reports)

2008-12 — 2026-07 PIONEER NATURAL RES. USA, INC. 212 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2PIONEER NATURAL RES. USA INC.110,4002008-03-21