首页 | 本学科首页   官方微博 | 高级检索  
     检索      

Biot介质中P波与井孔的耦合
引用本文:王克协 White,JE.Biot介质中P波与井孔的耦合[J].地球物理学报,1996,39(1):103-113.
作者姓名:王克协 White  JE
作者单位:1. 吉林大学, 长春 130023; 2. Colorxdo School of Mines, Golden, Colorxdo 80401,USA
摘    要:依据全频域的Biot理论,推导了在Biot的流体饱和孔隙介质中,平面P波垂直井轴入时与井孔相互作用所产生的井内声压场的解析表达式.通过数值计算,对井内声压场出现的共振响应进行了分析.重点研究在不同频率段渗透率对井内声压的影响及偏离井轴记录时声压的变化.结果表明,在井内测量地震波声压,全频域都有明显影响;测量大于500HZ的地震信号,检波器偏离井轴放置以及方位不同的影响不能忽略;渗透率变化对井内声压的影响程度最大不超过弹性固体情况(零渗透率)下相应声压的1/5.

关 键 词:Biot介质  平面P波  井孔耦合  渗透率  
收稿时间:1995-04-26

P-WAVE COUPLING TO HOLE IN BIOT SOLID
WANG KE-XIE,J.E WHITE,WU XIAN-YUN.P-WAVE COUPLING TO HOLE IN BIOT SOLID[J].Chinese Journal of Geophysics,1996,39(1):103-113.
Authors:WANG KE-XIE  JE WHITE  WU XIAN-YUN
Institution:1. Jilin University, Changchun 130023, China; 2. Colorado School of Mines, Golden, Colorado 80401, U.S.A
Abstract:An exact treatment of the Coupling of an external plane P-wave to a fluid-filled hole in a Biot solid is presented.The mechanism of the resonance response of the pressure in a hole is analyzed theoretically and numerically.This theory is compared with a quasi-static derivation from the literature, good at low frequency,and with published theories of coupling of P-waves in a surrounding elastic solid.The effect of permeability in different frequency range on the pressure in a hole and the change of the pressure for off-axis are investigated emphatically.The results show that the well hole has a significant effect on the pressure of seismic wave measured in the hole over the complete frequency range;when the frequency of the seismic signal measured is over 500 Hz,the effect of the off-axis measurement and the difference of azimuth must be considered also; the maximum of the change of pressure caused by permeability is about a fifth of the pressure in elastic solid case corresponding zero permeability limit.
Keywords:Biot soid  Plane  P-wave  Borehole coupling  Permeability    
本文献已被 CNKI 维普 等数据库收录!
点击此处可从《地球物理学报》浏览原始摘要信息
点击此处可从《地球物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号