井间地震高斯射线束正演方法  

FORWARD MODELING BY GAUSSIAN BEAM METHOD IN CROSSWELL SEISMIC

作　　者：张汝杰[1] 贺振华[1] 王理[1] 

机构地区：[1]成都理工学院

出　　处：《物探化探计算技术》1997年第2期128-137,共10页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：本文根据高斯射线束方法的基本原理和数学表达式，结合井间地震方法的特殊观测方式，开发了井间地震方法的正演模块，给出了不同观测条件下各种模型的试验结果。该模块在二维非均匀各向同性介质中，可以同时或单独计算直达Ｐ波、Ｓ波，上行反射Ｐ波、Ｓ波和转换波，下行反射Ｐ波、Ｓ波及转换波。计算出的地震波场不仅能反映波的运动学特性，还能反映波的高频动力学特征。In this paper, the basic principle of Gaussian beam approach and its mathematical expression is introduced. Considering the characteristics of the Gaussian beam method and the typical geometry in cross well seismic exploration, a forward modeling program for cross well seismic method is developed. Numerical tests have been done in various models with different geometries. The program can calculate many types of waves in 2 D inhomogeneous media at one step, including direct P、S waves,upward P、S reflections, downward P、S reflectons and conversions, or only some of them. The synthetic seismogram possesses both motional and dynamic characteristics of elastic wave in the high frequency band.

关 键 词：井间地震 高斯射线束 正演模型 地震勘探 测井 

分 类 号：P631.815[天文地球—地质矿产勘探]