Modeling and analysis of frequency-dependent seismic responses based on rock physics model

Abstract

Seismic wave reflection energy is largely related to the reservoir parameters such as porosity and fluid saturation which has been verified by the theoretical rock physics models, numerical modeling and some field case studies. Recently, studies on frequency-dependent reflection energy and attenuation have drawn much attention which are used for reservoir parameters prediction quantitatively. Based on White‟s model, in this paper we model and study the frequency-dependent seismic velocity, normal-incidence reflection coefficient (NI) and attenuation characteristics with the variation of water saturation and porosity. We analyze the sensitivity of the above frequency-dependent seismic responses on water saturation and porosity. And we construct a cross-plot template of frequency-dependent normal incidence reflection coefficient (NI) and attenuation relating to porosity and water saturation and hope to predict these two reservoir parameters quantitatively.