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Double-porosity rock model and squirt flow in the laboratory frequency band 被引量:8
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作者 巴晶 曹宏 +2 位作者 姚逢昌 聂建新 杨慧珠 《Applied Geophysics》 SCIE CSCD 2008年第4期261-276,共16页
Biot theory research has been extended to the multi-scale heterogeneity in actual rocks. Focused on laboratory frequency bandwidth studies, we discuss the relationships between double-porosity and BISQ wave equations,... Biot theory research has been extended to the multi-scale heterogeneity in actual rocks. Focused on laboratory frequency bandwidth studies, we discuss the relationships between double-porosity and BISQ wave equations, analytically derive the degeneration method for double-porosity's return to BISQ, and give three necessary conditions which the degeneration must satisfy. By introducing dynamic permeability and tortuosity theory, a full set of dynamic double-porosity wave equations are derived. A narrow band approximation is made to simplify the numerical simulation for dynamic double-porosity wavefields. Finally, the pseudo-spectral method is used for wave simulation within the laboratory frequency band (50 kHz). Numerical results have proved the feasibility for dynamic double-porosity's description of squirt flow and the validity of the quasi-static approximation method. 展开更多
关键词 double-porosity rock pseudo-spectral method self-affine fractal microscopicscale mesoscopic scale
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