CHALK, MARY -G-

Oil · District 08 · Lease #12624

Operator: MARATHON OIL COMPANY

Cum Oil

15k BBL

Cum Gas

21 MCF

casinghead

Wells

3

Production

1993-01 — 2011-11

Peak Month

1993-10

Production History

Cum Oil: 15,040 BBL Cum Gas: 21 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

90 BBL/mo

Di (annual)

4.7%

b-factor

0.0

EUR

20,766 BBL

R-squared

0.354

type

exponential

Operator History (from monthly production reports)

2006-04 — 2012-08 LEGACY RESERVES OPERATING LP 77 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 (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3EXTEX OPERATING COMPANY11,5001977-09-15
142-227-04138LEGACY RESERVES OPERATING LP------
242-227-04141LEGACY RESERVES OPERATING LP------