
%0 Journal Article
%A Ba, Jing 
%A Guo, Mengqiu 
%A Xu, Wenhao 
%A Sun, Fengyuan 
%A Zhang, Lin 
%A Cheng, Wei 
%T A double double-porosity model for wave propagation in patchy-saturated tight sandstone with fabric heterogeneity
%J ASEG Extended Abstracts
%D 2018/02/26
%V 2018
%N 1
%P 1-6
%K 
%R https://doi.org/10.1071/ASEG2018ABW9_2B
%U https://www.publish.csiro.au/paper/ASEG2018ABW9_2B 
%X In natural reservoir rocks, fabric heterogeneity can further induce heterogeneous geometrical distribution of immiscible multi-phase fluid mixture, since fluid migration may be affected by lithological variation (mainly permeability) in geological time scales, causing patchy saturation of fluids. Both structure heterogeneity and patchy-saturation can lead to strong seismic wave dispersion and attenuation. In this work, a double double-porosity model is presented to describe the overlapping effect of the two heterogeneities on wave dispersion and attenuation. The wave propagation equations are derived from the Hamilton&#x2019;s principle, and the numerical results for a tight sandstone are compared with corresponding low-frequency experimental data, which shows good agreements. This new model allows for a comprehensive description of wave propagation process in highly complex reservoirs. 
