流体变化对裂缝岩石弹性性质的影响  

The Effect of Fluid Variations on Elastic Properties of Rocks with Fractures

作　　者：姜黎明[1] 孙建孟[1] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东青岛266555

出　　处：《石油天然气学报》2011年第7期72-75,3,共4页Journal of Oil and Gas Technology

基　　金：国家"863"计划项目(2006AA060105)

摘　　要：为了进一步认识流体性质对裂缝岩石弹性性质的影响规律,结合线性滑移模型和各向异性Gassmann理论研究了孔隙流体变化对裂缝岩石弹性性质的影响。数值计算结果表明孔隙度和流体体积模量较小时,纵波各向异性和裂缝软度对流体变化比较敏感。干岩石和流体饱和裂缝岩石的纵波、快横波及慢横波速度都随基质孔隙度的增加而减小,并且随着基质孔隙的增加,横波各向异性有减小的趋势。In order to further understand the effect of fluid properties on elastic properties of rocks with fractures,in combination with linear slip model and anisotropic Gassmann theory,the effect of fluid variations on elastic properties of rocks with fractures was studied.The numerical calculation results show that the P-wave anisotropy parameter and the normal fracture weakness are sensitive to fluid variations when the background porosity and fluid bulk modulus are small.The P-and S-wave velocities of dry and saturated rocks with fractures decrease with the increase of matrix porosity.The shear wave anisotropy reduces as the matrix porosity increases.

关 键 词：裂缝 各向异性 流体体积模量 速度 

分 类 号：P631.44[天文地球—地质矿产勘探]