METHOD FOR CEMENT PLACEMENT IN HORIZONTAL WELLS

摘要

A well completion process for improved cement placement in a horizontal wellbore where a fluid is circulated down the wellbore for conditioning and cleaning it. Afterwards, a production tube containing centralizers is positioned centrally within the wellbore. Next, a "spacer fluid" is circulated within an annulus formed by the space between the tube and the wellbore so as to clean the annulus out. Subsequently, a cement having a density greater than the spacer fluid is pumped into the annulus. Thereafter, a light weight cement is pumped into the annulus thereby overriding the heavier cement and removing voids in the annulus resulting in more efficient cement placement.