STUDY ON FURNACE SLAG MTC TECHNOLOGY AND ITS APPLICATION IN DAGANG OILFIELD

The geological conditions become more complicated in Dagang Oilfield in recent years with the deepening degree of water injection development and hole depth, and the conventional cementing technology is not sufficient for solving the problems erected, such as,low displacement rate,high fluid loss,which causes potential difficulties for completion and stimulation. Lab study and field tests are conducted on the cement slurry system aiming to resolve these technical difficulties. It shows the MTC technology is a good option for the cementing problems in some blocks of Dagang, and it was used in 14 wells such as GS14-22, and cementing qualification rate of 100% and excellent rate of 57% was achieved, and the excellent rate in the pay zone reached as high as 85%.