Abstract

Summary Seismic wave attenuation and dispersion are related to the fluid content in reservoir which is verified by rock physics models (such as White’s model and Chapman’s model), numerical modeling and some field case studies. Based on White’s model, we modeled and studied the seismic dispersion and attenuation characteristics with the variation of gas saturation and porosity through deriving approximate frequency-dependent reflection coefficient (FDRC) and found that seismic wave dispersion is more sensitive to gas saturation and porosity than velocity. With the analysis of the cross-plots of normal incidence reflection coefficient (NI) and dispersion, it provides a potential way to predict the petrophyiscal properties of gas saturation and porosity quantitatively.

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