TURNBULL UNIT B

Oil · District 02 · Lease #10652

Operator: MARATHON OIL EF LLC

Cum Oil

201k BBL

Cum Gas

493k MCF

casinghead

Wells

2

Production

2011-11 — 2026-04

Peak Month

2012-10

Production History

Cum Oil: 200,738 BBL Cum Gas: 492,956 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

6,565 BBL/mo

Di (annual)

97.4%

b-factor

0.6

EUR

181,478 BBL

R-squared

0.673

type

hyperbolic

Operator History (from monthly production reports)

2011-11 — 2026-07 MARATHON OIL EF LLC 176 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HMARATHON OIL EF LLC516,8542013-08-27
8HMARATHON OIL EF LLC215,5002012-06-22