WHITSETT-POSEY UNIT

Oil · District 02 · Lease #10402

Operator: MARATHON OIL EF LLC

Cum Oil

213k BBL

Cum Gas

624k MCF

casinghead

Wells

3

Production

2012-11 — 2026-04

Peak Month

2013-04

Production History

Cum Oil: 213,381 BBL Cum Gas: 623,670 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

8,925 BBL/mo

Di (annual)

134.8%

b-factor

0.5

EUR

154,400 BBL

R-squared

0.635

type

hyperbolic

Operator History (from monthly production reports)

2012-11 — 2026-07 MARATHON OIL EF LLC 165 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HMARATHON OIL EF LLC115,5002012-12-28
3HMARATHON OIL EF LLC115,5002012-12-28
1HMARATHON OIL EF LLC116,8002012-10-23