An Insight on Gas Migration in Cement Slurry

Abstract

© 2020 IOP Publishing Ltd. All rights reserved. The fluid invasion basically gas in the cement column is a worldwide problem. This is one of the main challenges of oil well industries to protect the wellbore from fluid invasion. This problem has recognized in the mid of 1970 and basic technologies associated with it has not changed significantly. The leakage of gas can cause to the catastrophic events such as blow out and contamination of adjacent aquifer layers leading to environmental concerns. Although much effort has been put forth on gas migration issues, but no efficient solutions have been established to control it. The main reason for this is some lack of understanding the phase behavior of cement slurry. This may be the reason for that there is no standard available till now for gas migration. This study reviews the various causes of occurrence of gas migration in the cement column. Moreover, this study provides a comprehensive insight on gas migration control additives, which is generally be used in oil well industries to protect the fluid invasion in cement slurry.