The Study On New High-strength Low-density Cement Slurry System

Low-density cement slurry application in the field becomes more extensive, Mainly in order to prevent the loss of easy leakage layer with low pressure and to meet the demand for one-time long closure, at present, the oil field study of low-density cement growing, However, the density of the slurry within the scope of 1.20g/cm3-1.35g/cm3 system, its intensity of cement is relatively low and are generally lower than 14MPa, with the cost of excessive mud and water, so applications in the field has been greatly hindered.In this paper, new type of low-density cement slurry through the addition of the preferred admixture and different physico-chemical properties of particle analysis, a reasonable application of particle size distribution and the closest packing theory, and a large number of laboratory studies, the development of a cement slurry density in 1.20g/cm3-1.35g/cm3 range of new high-strength low-density cement slurry system, water mud deposition has good stability, wide range of applications, high compressive strength of cement, to a certain extent control the application of slurry system costs, and the resolution of ordinary Cenosphere density increased under low-density high-pressure technical issues for the oil field exploration and development to provide effective technical support.