Interior Research of Resistance to High 220 Degrees Heat Resistance Drilling Fluid System

Abstract

Focusing on high temperature rheological stability and filtration control of high temperature resistant drilling fluid system, in this context, further research has been made on mud formula and the formula of high temperature resistant drilling fluid system was optimized, Finally, a kind of organic silicon drilling system with high 220 degrees heat resistance and good performances was developed, in combination with the evaluation of the validity for the overall performance of the drilling system. In virtue of the behavior of high temperature stabilizing agent, the system provided excellent shale inhibition, lubrication and tough hole stabilization. The filtrate value is low, the mud cake is thin and tough, which are good for bit balling prevention; the capacity of cuttings transportation is efficient, as well as the easy-control rheological property. In high salinity conditions, the entire drilling fluid properties maintain stability; limit the pollution of 6% NaCl or 0.5%CaC12. The composition of fluid is non-toxicity, non-fluorescence, which is fitful for deep drilling.