TURNBULL UNIT A

Oil · District 02 · Lease #9596

Operator: MARATHON OIL EF LLC

Cum Oil

645k BBL

Cum Gas

1.7M MCF

casinghead

Wells

9

Production

2010-12 — 2026-04

Peak Month

2010-12

Production History

Cum Oil: 645,354 BBL Cum Gas: 1,735,554 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

27,762 BBL/mo

Di (annual)

94.4%

b-factor

0.3

EUR

503,700 BBL

R-squared

0.712

type

hyperbolic

Operator History (from monthly production reports)

2011-11 — 2026-07 MARATHON OIL EF LLC 177 mo
2010-12 — 2011-10 HILCORP ENERGY COMPANY 11 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HMARATHON OIL EF LLC516,8542013-08-27
1HMARATHON OIL EF LLC416,9462013-07-03
10HMARATHON OIL EF LLC217,0002012-08-09
16HMARATHON OIL EF LLC216,0002012-07-17
11HMARATHON OIL EF LLC214,0002012-07-10
4HMARATHON OIL EF LLC313,5002011-12-02
3HMARATHON OIL EF LLC212,5002011-09-13
6HMARATHON OIL EF LLC113,5002011-02-01
5HMARATHON OIL EF LLC113,5002011-01-05