THE IMPORTANT METHOD TO IMPROVE THE QUALITY OF CEMENTING OF ADJUSTMENT WELL——OUTER CASING PACKER OPERATION

Adjust well is the major method to increase production in the old oil field.The adjust well’s cementing quality will directly affect the separate zone production and well stimulation of the secondary and tertiary recovery and relate to improve recovery in old oilfield.In the recent time,the qualification rate of cementing quality in adjust well is low in Kelamyi oilfield.The oil and gas channeling occurs in the annulus after cementing and the pressure testing is often unsuccessful,which extremely affect the well stimulation and stable production.The outer casing packer can be used in the troublesome wells in which the high pressure gas channeling and the loss of circulation occur,to improve the cementing quality.In this paper,the application of outer casing packer in adjust well in Kelamyi oil field and improving cementing quality are introduced.