Plug and Abandonment Basics - George E King Petroleum ...

Finding and Repairing Channels in Cement• Channels in cement occur from many causes:– Lack of effective pipe centralization,– Inadequate mud conditioning prior to cementing,– Ineffective cement displacement design and/or execution,– Excess free water in the cement, especially in a deviatedhole (usually a cement mixing problem).– Excessive fluid loss from the cement slurry (generallyresults in low cement top),– Gas influx before the cement sets,– Cement shrinkage,– Etc.3/14/2009George E. King EngineeringGEKEngineering.com28