CEMENT INTEGRITY EVALUATION

SONIC LOGGING

CBL-VDL

© 2006 Weatherford. All rights reserved.2

© 2006 Weatherford. All rights reserved.3

© 2006 Weatherford. All rights reserved.4

© 2006 Weatherford. All rights reserved.5

© 2006 Weatherford. All rights reserved.6

© 2006 Weatherford. All rights reserved.7

© 2006 Weatherford. All rights reserved.8

© 2006 Weatherford. All rights reserved.9

© 2006 Weatherford. All rights reserved.10

© 2006 Weatherford. All rights reserved.11

© 2006 Weatherford. All rights reserved.12

© 2006 Weatherford. All rights reserved.13

© 2006 Weatherford. All rights reserved.14

© 2006 Weatherford. All rights reserved.15

© 2006 Weatherford. All rights reserved.16

© 2006 Weatherford. All rights reserved.17

© 2006 Weatherford. All rights reserved.18

© 2006 Weatherford. All rights reserved.

Basic principle

19

© 2006 Weatherford. All rights reserved.

Expected values

20

© 2006 Weatherford. All rights reserved.21

© 2006 Weatherford. All rights reserved.22

© 2006 Weatherford. All rights reserved.23

© 2006 Weatherford. All rights reserved.24

© 2006 Weatherford. All rights reserved.25

© 2006 Weatherford. All rights reserved.26

© 2006 Weatherford. All rights reserved.27

© 2006 Weatherford. All rights reserved.

Log presentation

28

© 2006 Weatherford. All rights reserved.

Fast formations

29

© 2006 Weatherford. All rights reserved.

Fast formations

30

© 2006 Weatherford. All rights reserved.

Bond Index definition

31

© 2006 Weatherford. All rights reserved.

Cement bond chart

32

© 2006 Weatherford. All rights reserved.

Hydraulic isolation

33

© 2006 Weatherford. All rights reserved.34

© 2006 Weatherford. All rights reserved.

Micro Annulus

35

© 2006 Weatherford. All rights reserved.36

© 2006 Weatherford. All rights reserved.37

© 2006 Weatherford. All rights reserved.38

SONIC CEMENT EVALUATION: CBL-VDL

Examples