CEMENT BOND EVALUATION

Instructor: Roger L. Nutt                                                             1 day

 

Who should attend:

Drilling and Production Managers, Drilling Engineers, Production Engineers, Completions Engineers, Petrophysicists, Technicians, and anyone who needs a basic understanding of the different methods of evaluating cement bonding.

 

About this course:

Cement bond logs can indicate free pipe when there is a perfect cement sheath around the casing. One cement bond tool can indicate excellent bonding when another shows no cement. There can be excellent cement placement around the casing - but there is a channel in the casing-formation annulus through which formation fluids can flow freely. The Cement Bond Log you are trying to interpret looks perfectly normal - but the CBL signal has nothing to do with the cement bonding. This course explains how these phenomena can occur, and what - if anything - you can do to prevent them.

 

Course Content:

 

• How cement bond logs work.
• How to read the cement bond signal, and what it means.
• How micro-annulus affects cement evaluation tools, and how to avoid it.
• Is your CBL any good? How was it run?
• Cement Evaluation and Pulse echo tools - how they work, what they mean.
• Ultra-sonic bond indicators - what they measure, why they complement other tools but do not replace them. 

What you will learn...

What micro-annulus is, how to avoid it, and how to tell the difference between a good cement bond survey and one which is useless. Why different cement evaluation tools can give contradictory answers; and why a well with a perfect cement job can leak through the casing-formation annulus.