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Calculation of safe drilling mud density window for shale formation by considering chemo-poro-mechanical coupling effect
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ZHANG Shifeng,WANG Haige,QIU Zhengsong,CAO Wenke,HUANG Hongchun,CHEN Zhixue
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Table 2 Parameter combinations for calculating pore pressure at borehole wall.
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| Parameter combinations | Ks/
10-10 μm2 | σms | ds/
mm | Parameter combinations | Ks/
10-10 μm2 | σms | ds/
mm | | p 1 | 1.00 | 0.3 | 1 | p 7 | 0.10 | 0.3 | 2 | | p 2 | 1.00 | 0.5 | 1 | p 8 | 0.10 | 0.5 | 2 | | p3 | 1.00 | 0.3 | 2 | p 9 | 0.01 | 0.3 | 1 | | p 4 | 1.00 | 0.5 | 2 | p 10 | 0.01 | 0.5 | 1 | | p 5 | 0.10 | 0.3 | 1 | p 11 | 0.01 | 0.3 | 2 | | p 6 | 0.10 | 0.5 | 1 | p 12 | 0.01 | 0.5 | 2 |
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