RETZLOFF-CHAPMAN UNIT

Oil · District 02 · Lease #10196

Operator: MARATHON OIL EF LLC

Cum Oil

614k BBL

Cum Gas

978k MCF

casinghead

Wells

3

Production

2012-07 — 2026-04

Peak Month

2012-09

Production History

Cum Oil: 613,951 BBL Cum Gas: 978,231 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

32,001 BBL/mo

Di (annual)

98.0%

b-factor

0.4

EUR

646,223 BBL

R-squared

0.809

type

hyperbolic

Operator History (from monthly production reports)

2012-07 — 2026-07 MARATHON OIL EF LLC 169 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3HMARATHON OIL EF LLC115,0002012-05-16
1HMARATHON OIL EF LLC115,0002012-05-11
2HMARATHON OIL EF LLC115,0002012-05-11