WASHINGTON WEST E 23-14

Oil · District 7C · Lease #21258

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

165k BBL

Cum Gas

1.9M MCF

casinghead

Wells

1

Production

2021-02 — 2026-04

Peak Month

2021-07

Production History

Cum Oil: 164,579 BBL Cum Gas: 1,935,272 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

21,798 BBL/mo

Di (annual)

370.5%

b-factor

0.7

EUR

206,738 BBL

R-squared

0.914

type

hyperbolic

Operator History (from monthly production reports)

2021-06 — 2026-07 PIONEER NATURAL RES. USA, INC. 62 mo
2021-02 — 2021-05 DE3 OPERATING LLC 4 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4305HPIONEER NATURAL RES. USA, INC.29,5002019-04-16