CHALK, OTIS

Oil · District 10 · Lease #19011

Operator: UNION OIL COMPANY OF CALIFORNIA

Cum Oil

738k BBL

Cum Gas

0 MCF

Wells

28

Production

1993-01 — 2012-02

Peak Month

1995-05

Production History

Cum Oil: 737,993 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

5,529 BBL/mo

Di (annual)

8.1%

b-factor

0.2

EUR

931,336 BBL

R-squared

0.839

type

hyperbolic

Wells (28)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
10CHEVRON MIDCONTINENT, L.P.13,2362008-10-17
17CHEVRON U. S. A. INC.13,1262008-10-17
21UNION OIL COMPANY OF CALIFORNIA12,6001994-10-18
L 11WRUNION OIL COMPANY OF CALIFORNIA13,2501993-06-25
L 9WRUNION OIL COMPANY OF CALIFORNIA13,2501993-06-25
42UNION OIL COMPANY OF CALIFORNIA13,2001993-01-07
2RUNION OIL COMPANY OF CALIFORNIA13,2001992-09-22
3RUNION OIL COMPANY OF CALIFORNIA13,2001992-08-28
40UNION OIL COMPANY OF CALIFORNIA23,2051992-01-08
5UNION OIL COMPANY OF CALIFORNIA13,1321991-11-26
8UNION OIL COMPANY OF CALIFORNIA13,1791990-12-26
39UNION OIL COMPANY OF CALIFORNIA13,1001984-11-19
142-227-02699--------
1142-227-02706--------
1642-227-02711--------
1942-227-02714--------
1W42-227-30296--------
2042-227-02715--------
2201W42-227-10173--------
230142-227-10174--------
250142-227-10176--------
2W42-227-30358--------
4W42-227-30308--------
5W42-227-30309--------
6W42-227-30310--------
742-227-04274--------
8W42-227-30340--------
942-227-04273--------
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