Currently,the substrate used for well cementing is mostly oil well cement,which is a inherently brittle material and undergoes volume shrinkage during hydration.During long-term service,micro cracks or gaps are prone to occur in the cement sheath.Based on this,researchers at home and abroad have developed repair techniques,using self-healing materials to repair damaged areas through their mechanism of action,achieving repair of the mechanical or bonding ability of the cement sheath.This article provides a review of the ap-plication research of cement self-healing technology in well cementing,and prospects for fu-ture development.
维普
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