• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Dynamics Elasticity of Microbedded Fractured Rocks
【24h】

Dynamics Elasticity of Microbedded Fractured Rocks

机译：微镶裂缝岩石的动力弹性

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Microbedded rocks have an anisotropic frequency-dependent sound speed whichdepends on the intrinsic sound speeds of the individual microbeds and on the O'Doherty-Anstey effect. Fractured rocks have an anisotropic frequency-dependent sound speed which depends on the intrinsic sound speed of the unfractured rock, the frequency-dependent phase shift that occurs during reflection or transmission across a fracture, and the interfracture O'Doherty-Anstey effect. These effects are neglected by the quasistatic methods presently used to generate elastic constants. Here I introduce a new method for generating elastic constants that contain all the above effects. First, a statistical description of the rock is used to generate a sample of the rock. Then an exact two-way method is used to propagate just a few plane waves, of frequency f, a distance of several wavelengths from the source. If an equivalent homogeneous medium exists at frequency f, then the computed motions must also satisfy a one-way elastic wave equation for that equivalent medium. This one-way wave equation is used to invert for the elastic coefficients. When no equivalent medium exists, perhaps because f is too large, this is indicated by the inversion. Possible applications of the method are prediction of seismic sound speeds from measurements of bed thicknesses in cores; analysis of laboratory data for fracture constitutive relations; and inversion of multioffset vertical seismic profiling data for elastic coefficients comparable with those predicted from cores. Keywords: Rock mechanics; Seismic velocity; Elastic constants; Reprints. (EDC)

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号