Abstract：Using high-precision staggering mesh finite-difference approach, the paper finished wavefield simulation of biphase one-layer EDA medium based on BISQ mechanism and surface seismic records simulation of biphase triple-layer medium, and analyzed the difference in interpretation of seismic wave propagation between biphase medium theory and single-phase medium theory within seismic bands and the factors affecting slow P-wave, which gained following knowledge: the results of surface seismic simulation of seismic wavefield propagating in biphase EDA medium based on BISQ mechanism showed there exists second mode of P-wave (slow P-wave), the velocity of which is in proportion to porosity and fluid density, and an inverse measure of coupled density; the amplitude of which is generally inversely proportional to porosity. In a case of given same parameters, the propagation phenomenon of seismic wavefield described by BIOT theory, BISQ theory and single-ghase elastic theory is similar; in comparison with biphase BISQ theory, the BIOT theory and single-phase elastic theory underestimated the attenuation of seismic waves and overestimated the dispersion of seismic waves, which showed the shortcoming of BIOT theory. Seen from arrived times of seismic waves, within the seismic band (i.e. low frequency range), the velocities of various waves predicted by single-phase elastic theory and BIOT theory are higher than that by BISQ theory, and earlier for arrived time. Currently, it is considered that the biphase medium model based on BISQ mechanism is more consistent with the practical situation and application of BISQ forward simulation technique could detect reservoir parameters.
轩义华, 何樵登, 孟庆生, 揣媛媛, 湛邵斌. 基于BISQ机制的双相EDA介质的波场分析[J]. 石油地球物理勘探, 2006, 41(5): 550-556.
Xuan Yi-hua, He Jiao-deng, Meng Qing-sheng, Chui Yuan-yuan and Zhan Shao-bin. Wavefield analysis of biphase EDA medium based on BISQ mechanism. OGP, 2006, 41(5): 550-556.
