CHALK, G. O. -D-

Oil · District 08 · Lease #18990

Operator: CONOCOPHILLIPS COMPANY

Cum Oil

171k BBL

Cum Gas

23k MCF

casinghead

Wells

8

Production

1993-01 — 2011-11

Peak Month

1993-04

Production History

Cum Oil: 170,953 BBL Cum Gas: 23,084 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,565 BBL/mo

Di (annual)

13.5%

b-factor

0.6

EUR

229,928 BBL

R-squared

0.756

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 (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
20CONOCOPHILLIPS COMPANY13,2501980-06-05
21CITATION OIL & GAS CORP.13,2501980-06-05
18CONOCOPHILLIPS COMPANY13,2001977-12-02
442-227-00379CITATION OIL & GAS CORP.------
542-227-00512CITATION OIL & GAS CORP.------
642-227-00510CITATION OIL & GAS CORP.------
7W42-227-10068CONOCOPHILLIPS COMPANY------
8 L42-227-10069CONOCOPHILLIPS COMPANY------