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What is Gas and Fluid Migration in Cementing about?

This document discusses gas and fluid migration in oil and gas wells. It identifies several causes of gas migration including mud channels, free fluid channels, gas invasion of cement, microannuli, and stress cracking of set cement. It also discusses how to prevent gas migration such as through good mud removal, maintaining pressure balance, using special cement slurries with low permeability and high durability, and controlling stresses on set cement. The document provides details on calculating risk of ga

Author

Ali Aliiev

Language

EN