Experimental study on influence of laminae direction on P-wave and S-wave velocities and elastic parameters of shale

被引：0
|
作者：
Shi X. [1 ]
Wang G. [1 ]
Xiong Z. [1 ]
Li M. [2 ]
机构：
[1] School of Geosciences, China University of Petroleum(East China), Qingdao, 266580, Shandong
[2] Research Institute of Petroleum Exploration and Development, Langfang, 065007, Hebei
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2019年 / 38卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Elastic parameters; Lacustrine shale; Laminae direction; Microcrack; P-wave and S-wave velocities; Rock mechanics;
D O I：
10.13722/j.cnki.jrme.2019.0060
中图分类号：
学科分类号：
摘要：
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. © 2019, Science Press. All right reserved.
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页码：1567 / 1577
页数：10
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