| Citation: | Han Xiao, Xinmin Shang, Zhentao Wang, Xiping Wang. Study of Seismic P Wave in Mesoscale Fracture-Induced Arbitrary Anisotropic Media. Journal of Earth Science, 2024, 35(2): 717-721. doi: 10.1007/s12583-024-1967-y
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Mesoscale fracture controls the permeability of shale reservoirs, it is one of the main research objectives of natural fractures. The length of the mesoscale fracture is less than 1/4 of the seismic eigen wavelength and greater than 1% of the seismic eigen wavelength, they cannot be identified in actual seismic 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.
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