CHAPMAN PFEIL UNIT

Oil · District 01 · Lease #15659

Operator: MARATHON OIL EF LLC

Cum Oil

534k BBL

Cum Gas

784k MCF

casinghead

Wells

3

Production

2011-05 — 2025-07

Peak Month

2015-02

Production History

Cum Oil: 533,961 BBL Cum Gas: 784,483 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

26,181 BBL/mo

Di (annual)

92.2%

b-factor

0.3

EUR

486,301 BBL

R-squared

0.759

type

hyperbolic

Operator History (from monthly production reports)

2011-11 — 2026-07 MARATHON OIL EF LLC 177 mo
2011-05 — 2011-10 HILCORP ENERGY COMPANY 6 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HMARATHON OIL EF LLC117,1002014-08-21
3HMARATHON OIL EF LLC117,4002014-08-21
1HMARATHON OIL EF LLC113,5002011-02-07