Comparison of acoustic propagation in several different types self-organized media
LIU Yong-Xia~1, XU Chun-Ming~ 1,2 , NING Jun-Rui~ 1,3 1 State Key Laboratory of Lithosphere Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China2 China National Offshore Oil Corporation, Shanghai 200030, China3 Beijing Computation Center, China National Star Petroleum Corporation, Beijing 100083, China
While seismic wave velocity shows large-scale deterministic geological structures, ubiquitous small-scale micro-fractures often cause statistic variations. Although seismic waves traveling through the Earth act as a low-pass filter and smooth out some small indeterministic components, those statistic in other words self-organized features exist underground. Six types of self-organized media are frequently used in seismology such as Gaussian, Exponential, self-similar, white noise, Flicker noise and Brown noise. From their filters, we compare different self-organized models with seismic recordings in conjunction with finite difference methods. The results show that various self-organized models of amplitude, energy and frequency will produce different synthetic seismograms. Thus we can make good use of this complex information to interpret field data well.