CHAPMAN-PFEIL 4H PSA

Oil · District 01 · Lease #19591

Operator: MARATHON OIL EF LLC

Cum Oil

226k BBL

Cum Gas

341k MCF

casinghead

Wells

1

Production

2019-02 — 2026-02

Peak Month

2019-07

Production History

Cum Oil: 226,358 BBL Cum Gas: 341,204 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

26,846 BBL/mo

Di (annual)

299.4%

b-factor

0.5

EUR

212,890 BBL

R-squared

0.964

type

hyperbolic

Operator History (from monthly production reports)

2019-02 — 2026-07 MARATHON OIL EF LLC 90 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4HMARATHON OIL EF LLC220,0002018-12-31