VTI介质中地震波反射波合成记录的方法研究

英文篇名：THE METHOD OF SEISMIC AND REFLECTION WAVE SYNTHETIC SEISMOGRAM IN VTI MEDIA
中文刊名：地球物理学进展
英文刊名：Progress In Geophysics
作者：杜丽英 ; 刘国明 ; 杜丽娟 ; 彭苏萍 ; 徐琳
英文作者：DU Li ying 1 LIU Guo ming 2 DU Li juan 3 PENG Su ping 1 XU Lin 1 (1. China University of Mining and Technology ; Beijing 100083 ; China ; (2. Research Institute ; SINOPEC ; Beijing 100081 ; China ; (3. Geophysical Exploration Corp. ; Liaohe P
中文关键词：VTI介质 ; 相速度 ; 群速度 ; 旅行时 ; 射线追踪
英文关键词：VTI (Transverse isotropy media with vertical symmetry axis) media ; Phase velocity ; Group velocity ; Travel time ; Ray trace
出版日期：2001-06-30
机构：中国矿业大学资源工程系!北京100083,中国石化集团勘探开发研究院!北京100081,辽河石油勘探局地球物理公司!盘锦124010,中国矿业大学资源工程系!北京100083,中国矿业大学资源工程系!北京100083
年：2001
期：02
出版单位：地球物理学进展

摘要

在各向异性介质中 ,由于地震波的相速度和群速度有较大差异 ,相角和群角不同 ,相速度、群速度及群角与相角之间的关系比较复杂 ,因此与各向同性相比较 ,计算地震波相速度、群速度及群角就更加困难 ,其合成地震记录的难度也就随之增大 .本文根据VTI(具有垂直对称轴的横向各向同性 )介质中地震波的运动学特征 ,应用射线追踪方法 ,计算了VTI介质中的地震波的旅行时 ,并合成了反射波地震记录 .这为反射地震波的旅行时及速度分析提供了基础 .
It is more difficult to calculate the phase velocity and the group velocity of seismic wave and the group angle, to synthesize seismic record become more difficult also in anisotropy than in isotropic media, due to the great difference between the phase velocity and the group velocity of seismic wave, the phase angle and the group angle, and the complicated relations between the phase velocity and the group velocity. In this paper, according to the characteristics of seismic wave in VTI (Transverse isotropy media with vertical symmetry axis) media, we calculate the travel time of seismic wave in VTI, and synthesize the reflective seismic wave record by using ray trace method. This lays a foundation for the traveltime and velocity analysis of reflective seismic waves.

引文

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