L.B. HAILEY UNIT

Oil · District 02 · Lease #10556

Operator: MARATHON OIL EF LLC

Cum Oil

459k BBL

Cum Gas

1.6M MCF

casinghead

Wells

3

Production

2013-06 — 2026-01

Peak Month

2022-10

Production History

Cum Oil: 459,468 BBL Cum Gas: 1,580,470 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

16,486 BBL/mo

Di (annual)

156.3%

b-factor

0.0

EUR

126,730 BBL

R-squared

0.815

type

exponential

Operator History (from monthly production reports)

2013-06 — 2026-07 MARATHON OIL EF LLC 158 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC122,0002021-03-12
2HMARATHON OIL EF LLC122,0002021-03-12
3HMARATHON OIL EF LLC117,5002013-03-29