COMPLETION TECHNIQUES IN CHENGBEI-A22 SIDE-TRACK HORIZONTAL WELL

Multilateral well is taken as one of the most potential drilling technique in the 21th.Chengbei-A22 side-track horizontal well is one of the multilateral well which apply to the four completion techniques in order to make the new and old well-bore co-production.The technique can not only provide more production area,but also keep the high production rating and enhance the recovery for the oil field.A22sh well is drilled on the A22 slot and use its well bore,with the whipstock and expandable tubular,the techniques mill the casing and drill the side-track horizontal well.The completion program run screen pipe and line,using the special inner string to locate the profile sub,inflate the annulus casing packing and make the cement program to baffle the water zone and seal the connection between the liner and the mail core.During the production,the new well bore puts into production firstly then retrieves the whipstock and mills the expandable tubular to make the new and old well-bore co-production.The techniques can reduce the cost of CB-A well platform,increase the production and enhance the recovery.