STUDY ON CEMENT-FORMATION BONDING BY USING DIFFERENT FORMATION LITHOLOGY

Quality of the cement job is vital to ensure economical, safe and stable production from a reservoir. A crucial part of this is the ability of cement to bond to the formation. Improper removal of drilling fluid or cement placement, or de-bonding due to unfavorable wellbore conditions can create potential flow paths. Zonal isolation losses from a cement sheath failure can occur in three places: in the cement forming interface, the bulk cement or the casing cement interface.