CHALK, G. O. -A-

Oil · District 08 · Lease #2685

Operator: CONOCOPHILLIPS COMPANY

Cum Oil

43k BBL

Cum Gas

28k MCF

casinghead

Wells

4

Production

1993-01 — 2011-11

Peak Month

1995-10

Production History

Cum Oil: 43,313 BBL Cum Gas: 28,396 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

693 BBL/mo

Di (annual)

48.5%

b-factor

0.6

EUR

35,981 BBL

R-squared

0.801

type

hyperbolic

Operator History (from monthly production reports)

2003-01 — 2012-03 CONOCOPHILLIPS COMPANY 111 mo
1993-01 — 2002-12 CONOCO INC. 120 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
55QUANTUM RESOURCES MANAGEMENT LLC13,2701993-06-17
12CITATION OIL & GAS CORP.23,0501980-08-28
442-227-04238CONOCOPHILLIPS COMPANY------
942-227-10054CITATION OIL & GAS CORP.------