Calculation of safe drilling mud density window for shale formation by considering chemo-poro-mechanical coupling effect

ZHANG Shifeng,WANG Haige,QIU Zhengsong,CAO Wenke,HUANG Hongchun,CHEN Zhixue

Fig. 11. Influence of permeability, swelling coefficient and strength damage coefficient of sealing layer on collapse pressure and fracturing pressure at the borehole wall.