Seismic wave simulation in attenuation medium based on FFD operator
He Binghong1, Wu Guochen1, Xu Chong2
1. School of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266555, China;
2. Geophysical Research Institute of Jiangsu Oilfield Branch Co., SINOPEC, Nanjing, Jiangsu 210046, China
Abstract：We propose the FFD operator for seismic one-way wave propagation in attenuation medium to achieve seismic wavefield numeral simulation in attenuation medium by transformation between space-time domain and the wavenumber-frequency domain. Since the numeral simulation of offset data in wavefield downward is not efficient, we apply Green's function integral solution of scattered wave to improve the computation efficiency. Results of numerical simulation of seismic wave propagation in attenuation medium indicate that the FFD operator is more accurate than the SSF operator, especially for steep dip layers. As we know, when seismic wave travels through gas reservoir, reflection delays occur. In this paper, we prove the contribution of stratigraphic absorption to the delay through the simulation based on the models built by seismic and well data. At the same time, we provide the mechanism of low-frequency shadow phenomenon.
