CASS-ERNEST E20U

Oil · District 08 · Lease #60178

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

173k BBL

Cum Gas

331k MCF

casinghead

Wells

1

Production

2023-11 — 2026-04

Peak Month

2024-01

Production History

Cum Oil: 173,297 BBL Cum Gas: 330,993 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

8,162 BBL/mo

Di (annual)

48.9%

b-factor

0.0

EUR

200,355 BBL

R-squared

0.440

type

exponential

Operator History (from monthly production reports)

2023-11 — 2026-07 PIONEER NATURAL RES. USA, INC. 33 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
21HPIONEER NATURAL RES. USA, INC.210,5032023-02-13