CHALK, MARY

Oil · District 08 · Lease #10116

Operator: MARATHON OIL COMPANY

Cum Oil

63k BBL

Cum Gas

21 MCF

casinghead

Wells

7

Production

1993-01 — 2011-11

Peak Month

1998-03

Production History

Cum Oil: 63,401 BBL Cum Gas: 21 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

458 BBL/mo

Di (annual)

7.5%

b-factor

0.0

EUR

71,182 BBL

R-squared

0.436

type

exponential

Operator History (from monthly production reports)

2006-04 — 2012-09 LEGACY RESERVES OPERATING LP 78 mo
1999-11 — 2006-03 BROTHERS PRODUCTION COMPANY INC. 77 mo
1996-04 — 1999-10 MARATHON OIL COMPANY 43 mo
1993-01 — 1996-03 GUTHRIE, A. K. OPERATING CO. 39 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
12EXTEX OPERATING COMPANY11,6111981-10-05
1042-227-10133EXTEX OPERATING COMPANY------
1142-227-10134EXTEX OPERATING COMPANY------
342-227-04143EXTEX OPERATING COMPANY------
442-227-04146EXTEX OPERATING COMPANY------
542-227-04147EXTEX OPERATING COMPANY------
742-227-04149EXTEX OPERATING COMPANY------