MAY GIRLS-CHAPMAN UNIT

Oil · District 02 · Lease #10641

Operator: MARATHON OIL EF LLC

Cum Oil

474k BBL

Cum Gas

730k MCF

casinghead

Wells

4

Production

2013-05 — 2025-12

Peak Month

2013-11

Production History

Cum Oil: 474,028 BBL Cum Gas: 729,941 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

22,154 BBL/mo

Di (annual)

80.1%

b-factor

0.3

EUR

473,342 BBL

R-squared

0.732

type

hyperbolic

Operator History (from monthly production reports)

2013-05 — 2026-07 MARATHON OIL EF LLC 159 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4HMARATHON OIL EF LLC115,0002013-02-04
2HMARATHON OIL EF LLC216,7382012-12-06
3HMARATHON OIL EF LLC115,0002012-12-06
1HMARATHON OIL EF LLC115,5002012-11-27