CHALK, G. O. -B-

Oil · District 08 · Lease #18988

Operator: CONOCOPHILLIPS COMPANY

Cum Oil

242k BBL

Cum Gas

37k MCF

casinghead

Wells

10

Production

1993-01 — 2011-11

Peak Month

1993-12

Production History

Cum Oil: 241,880 BBL Cum Gas: 37,294 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,709 BBL/mo

Di (annual)

15.5%

b-factor

2.0

EUR

405,364 BBL

R-squared

0.679

type

hyperbolic

Operator History (from monthly production reports)

2003-01 — 2012-04 CONOCOPHILLIPS COMPANY 112 mo
1993-01 — 2002-12 CONOCO INC. 120 mo

Wells (10)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
18CONOCOPHILLIPS COMPANY23,1001987-02-11
17CITATION OIL & GAS CORP.13,1001983-03-30
11CONOCOPHILLIPS COMPANY13,9001981-12-22
16CITATION OIL & GAS CORP.13,2001980-05-01
13W42-227-30341CONOCOPHILLIPS COMPANY------
14W42-227-30342CONOCOPHILLIPS COMPANY------
1542-227-31165CONOCOPHILLIPS COMPANY------
242-227-00516CITATION OIL & GAS CORP.------
342-227-00497CITATION OIL & GAS CORP.------
542-227-10056CITATION OIL & GAS CORP.------