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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 3 Parameter combinations used to calculate the safe drilling mud density window.
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| Parameter combinations | Ks/
10-10 μm2 | σm | ω0/
(MPa•mol-1•m3•s) | γ/
(m3•mol-1) | αdπd/
MPa | | C1 | 1.0 | 0 | 0 | 0 | 0 | | C2 | 1.0 | 0 | 1 | 0.005 | 0.5 | | C3 | 1.0 | 0 | 2 | 0.010 | 1.0 | | C4 | 1.0 | 0.2 | 0 | 0 | 0 | | C5 | 1.0 | 0.2 | 1 | 0.005 | 0.5 | | C6 | 1.0 | 0.2 | 2 | 0.010 | 1.0 | | C7 | 0.1 | 0 | 0 | 0 | 0 | | C8 | 0.1 | 0 | 1 | 0.005 | 0.5 | | C9 | 0.1 | 0 | 2 | 0.010 | 1.0 | | C10 | 0.1 | 0.2 | 0 | 0 | 0 | | C11 | 0.1 | 0.2 | 1 | 0.005 | 0.5 | | C12 | 0.1 | 0.2 | 2 | 0.010 | 1.0 | | C13 | 0.1 | 0 | 0 | 0.010 | 1.0 | | C14 | 0.1 | 0 | 1 | 0.010 | 1.0 | | C15 | 0.1 | 0 | 2 | 0.010 | 0 | | C16 | 0.1 | 0 | 2 | 0.010 | 0.5 |
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