Experimental study on influence of laminae direction on P-wave and S-wave velocities and elastic parameters of shale
SHI Xiaoming1，WANG Guanmin1，XIONG Zhouhai1，LI Mingpeng2
(1. School of Geosciences，China University of Petroleum(East China)，Qingdao，Shandong 266580，China；
2. Research Institute of Petroleum Exploration and Development，Langfang，Hebei 065007，China)
Abstract： P-wave and S-wave velocities are important parameters for studying shale anisotropy. In order to study the influence of the laminae direction on P-wave and S-wave velocities and dynamic elastic parameters，the Mesozoic and Cenozoic lacustrine shale in the eastern part of China was used as the research object，and P-wave and S-wave velocities experiments were carried out on the coring samples with different laminae directions. The results show that the ratio of P-wave and S-wave velocities has no correlation with the laminae direction，which is caused by the main extension direction of microcracks. The smaller the angle between the P-wave or S-wave propagation direction and the laminae direction，the greater the P-wave or S-wave velocity is. The P-wave and S-wave velocities in different laminae directions are always linearly correlated with each other. The slope and intercept of the linear curve are respectively related to the laminae interface and microcracks. The dynamic elastic modulus and the laminae direction have a good correlation，which is mainly affected by the laminae interface，while the dynamic Poisson?s ratio is independent of the laminae direction，which is mainly affected by microcracks.
石晓明1，王冠民1，熊周海1，李明鹏2. 纹层方向对泥页岩纵、横波速度及弹性参数影响的试验研究[J]. 岩石力学与工程学报, 2019, 38(8): 1567-1577.
SHI Xiaoming1，WANG Guanmin1，XIONG Zhouhai1，LI Mingpeng2. Experimental study on influence of laminae direction on P-wave and S-wave velocities and elastic parameters of shale. , 2019, 38(8): 1567-1577.
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2019, Vol. 38 
