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EDA介质的方位各向异性引起了人们的广泛关注。横波分裂对方位各向异性很敏感，但由于横波勘探施工困难、勘探成本高，因而未能得到广泛使用。本文利用（由定向排列的有机玻璃片模拟制作的）EDA物理模型来模拟研究EDA介质的纵波方位各向异性特征。研究结果表明，EDA介质的纵波方位各向异性特征明显，反射波旅行时、振幅以及方位角AVO都有明显的差异。在定偏移距旋转方式和共中心点道集观测记录上都有较强的反映。非熔结裂缝的各向异性程度与对裂缝体所施加压力的大小有关，压力增大，则裂缝减小，同时各向异性程度也减小。
The azimuthal anisotropy of EDA media has aroused people’s attention. Shear-wave splitting is very sensitive to azimuthal anisotropy, but it has not been widely used because of the difficulty in the construction of transverse waves and the high exploration cost. In this paper, a physical model of EDA (modeled by oriented plexiglas) was used to simulate the longitudinal azimuthal anisotropy of EDA media. The results show that the azimuthal azimuthal anisotropy of EDA medium is obvious, and the amplitude and azimuth AVO of the traveling waves are obviously different. There is a strong reflection in both the offset rotation and the observation of concentric point gathers. The degree of anisotropy of the non-fusion fracture is related to the pressure applied to the fracture body. When the pressure is increased, the fracture is reduced and the degree of anisotropy is also reduced.