首页|Study of Seismic P Wave in Mesoscale Fracture-Induced Arbitrary Anisotropic Media
Study of Seismic P Wave in Mesoscale Fracture-Induced Arbitrary Anisotropic Media
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Mesoscale fracture controls the permeability of shale res-ervoirs,it is one of the main research objectives of natural frac-tures.The length of the mesoscale fracture is less than 1/4 of the seismic eigen wavelength and greater than 1%of the seis-mic eigen wavelength,they cannot be identified in actual seis-mic data and are usually displayed by the azimuthal anisotropy of seismic attributes.In this paper,we propose a calculation process from fracture properties to seismic P-wave velocity and traveltime in anisotropic media induced by multiple sets of arbitrary occurring mesoscale fractures.Based on this process,the variations of the media's Anisotropic(A-)parameters with fracture properties are studied.Furthermore,variation of P-wave NMO elliptical principle axis with the relative fracture density is studied according to the arbitrary anisotropic theory based on A-parameters.
Han Xiao、Xinmin Shang、Zhentao Wang、Xiping Wang
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Geophysical Research Institute,SINOPEC Shengli Oilfield Company,Shandong 257022,China
Working Station for Postdoctoral Scientific Research,Shengli Oilfield,Shandong 257000,China
postdoctoral research project of Shengli Petroleum Administration Bureau
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