Analysis of Seismic Response of Heterogeneous Media: A Physical Modeling Study

Abstract:

In order to study the wavefield response of heterogeneous structure in seismic section, firstly, we have got the 2-D P-wave data for two kinds of heterogeneous structure in the physical model of a 3-D heterogeneous sand layer. Then, we choose several typical single shot seismic records and minimum offset gathers for wavefield analysis. Finally, we show two images generated by using reverse time migration (RTM) on the recording data. Experimental results indicate that, heterogeneous structure’s information is included in every single shot record; each heterogeneity forms a diffractor whose diffraction response, which affects the imaging of the interface between the heterogeneous region and the homogeneous region, is especially obvious in the minimum offset gathers; diffraction wave could be eliminated by RTM imaging, which could reflect the position of heterogeneous structure in reality; the differences of the wavefield response of the two kinds of heterogeneous structures are mainly reflected in the divergences of the events’ scale and power of the heterogeneities.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 1455-1459
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.1455
• Online since: February 2012
• Authors: Nai Chuan Guo, Shang Xu Wang, Hong Wei Guo
• Keywords: Heterogeneous Media, Physical Model, Reverse-Time Depth Migration

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