Special additives are available that can enhance the expansive properties of various cements. These additives work by way of crystalline growth or in-situ gas generation. Expansive cements expand slightly after the cement is set. This can help promote bonding integrity between cement and the casing and the formation for zonal isolation throughout the life of the well to provide the following benefits:
Control gas migration
Protect casing from corrosive conditions
Eliminate communication between fracture / stimulation treatments
Reduce or eliminate unwanted fluid production (water or gas)
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