Study on High Temperature Environmentally Friendly Drilling Fluid System

In this paper, facing to the requirements of environment protection, based on the analysis of the environmentally friendly drilling fluid agents often used, a novel environmentally friendly drilling fluid system is developed with the main weak gel agent of GEL-ZL, which is stable at 160℃.The experimental results show that the environmentally friendly drilling fluid system has good performances of inhibition and reservoir protection after rolled at 160℃, the permeability recovery rate is as high as 90.0%.