CASS-ERNEST E20N

Oil · District 08 · Lease #51983

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

349k BBL

Cum Gas

1.2M MCF

casinghead

Wells

1

Production

2019-02 — 2026-04

Peak Month

2019-05

Production History

Cum Oil: 348,572 BBL Cum Gas: 1,164,685 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

7,521 BBL/mo

Di (annual)

33.2%

b-factor

0.0

EUR

271,543 BBL

R-squared

0.399

type

exponential

Operator History (from monthly production reports)

2019-02 — 2026-07 PIONEER NATURAL RES. USA, INC. 90 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
14HPIONEER NATURAL RES. USA, INC.110,4502018-07-17