WASHINGTON WEST A 23-14

Oil · District 7C · Lease #20791

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

548k BBL

Cum Gas

1.2M MCF

casinghead

Wells

2

Production

2019-11 — 2026-04

Peak Month

2019-12

Production History

Cum Oil: 547,968 BBL Cum Gas: 1,243,903 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

38,485 BBL/mo

Di (annual)

200.4%

b-factor

0.7

EUR

645,139 BBL

R-squared

0.958

type

hyperbolic

Operator History (from monthly production reports)

2021-06 — 2026-07 PIONEER NATURAL RES. USA, INC. 62 mo
2019-11 — 2021-05 DE3 OPERATING LLC 19 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4201HPIONEER NATURAL RES. USA, INC.19,0002019-04-16
4401HPIONEER NATURAL RES. USA, INC.19,0002019-04-16