MCCOY UNIT B

Oil · District 02 · Lease #10848

Operator: MARATHON OIL EF LLC

Cum Oil

355k BBL

Cum Gas

1.1M MCF

casinghead

Wells

3

Production

2014-10 — 2026-04

Peak Month

2014-11

Production History

Cum Oil: 354,663 BBL Cum Gas: 1,130,159 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

7,947 BBL/mo

Di (annual)

37.5%

b-factor

0.4

EUR

406,869 BBL

R-squared

0.934

type

hyperbolic

Operator History (from monthly production reports)

2014-10 — 2026-07 MARATHON OIL EF LLC 142 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4HMARATHON OIL EF LLC118,0002012-10-25
5HMARATHON OIL EF LLC118,0002012-10-25
1HMARATHON OIL EF LLC213,5002010-10-27