地质力学学报2016，Vol.22Issue(4)：967-975,9.
围压下裂隙对地震波速度影响的物理实验研究
STUDY ON SEISMIC PROPERTY OF CRACK-INCLUDED PHYSICAL MODEL
摘要
Abstract
It is very helpful in petroleum production,groundwater exploration and to disposal of pollution to investigate the seismic property of the crustal rocks included cracks or fractures.Two group physical models with the same diameter varying crack density and the same density varying diameters were constructed.The seismic velocities were measured under different confining pressure and calculated by numerical simulation based on Hudson theory.The calculated and measured results show that the Vp and Vs nearly increase linearity and there anisotropy keep nearly stable constant with confining pressure.Vp circles decrease with the crack density varying from 2％ to 6％.Moreover,the slow Vp decrease more amplitude than the fast Vp which maintains nearly stable,the Vp and Vs anisotropy all increase with the crack density ranging from 2％ to 6％.With the crack diameter varying from 2 mm to 3 mm,the Vp increases,but the Vp anisotropy decreases,Vs and the V,anisotropy nearly remain constant.Comparing the experimental and the theoretical calculated results,new conclusion of Hudson theory used in different depth was discussed,and the primary constraint of its application were analyzed.It is very helpful in petroleum production,exploration of groundwater and disposal of pollution to investigaste the seismic property of the crustal rocks with cracks or fractures.关键词
裂隙/Hudson理论/物理模型/波速/围压Key words
crack/Hudson theory/rock physical model/velocity/confining pressure分类
天文与地球科学引用本文复制引用
赵卫华,王红才,魏建新,孙东生,李阿伟..围压下裂隙对地震波速度影响的物理实验研究[J].地质力学学报,2016,22(4):967-975,9.基金项目
中国地质调查局地质调查项目“特殊地质地貌区填图试点”(DD20160060) （DD20160060）
