CHALK, G. O.

Oil · District 08 · Lease #18986

Operator: CONOCOPHILLIPS COMPANY

Cum Oil

212k BBL

Cum Gas

30k MCF

casinghead

Wells

9

Production

1993-01 — 2011-11

Peak Month

1995-10

Production History

Cum Oil: 211,966 BBL Cum Gas: 29,642 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,127 BBL/mo

Di (annual)

3.5%

b-factor

0.1

EUR

326,749 BBL

R-squared

0.383

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 (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
24CITATION OIL & GAS CORP.23,2002009-06-29
26CITATION OIL & GAS CORP.23,2001984-05-22
25CITATION OIL & GAS CORP.13,2001983-05-06
23CONOCOPHILLIPS COMPANY13,3501982-06-07
21CONOCOPHILLIPS COMPANY13,1001980-05-01
1242-227-00503CITATION OIL & GAS CORP.------
13 L42-227-10051CITATION OIL & GAS CORP.------
14 L42-227-10052CITATION OIL & GAS CORP.------
15 L42-227-10053CITATION OIL & GAS CORP.------