Subsurface Imaging using Headwave Stacking

선두파 중합을 이용한 천부지층의 영상화

  • 박정재 (서울대학교 지구환경시스템공학부) ;
  • 고승원 (서울대학교 지구환경시스템공학부) ;
  • 신창수 (서울대학교 지구환경시스템공학부) ;
  • 서정희 (서울대학교 지구환경시스템공학부)
  • Published : 2002.08.01

Abstract

For economy and convenience, seismic refraction survey is widely used in surveying for large civil engineering work. The purpose of this study is to obtain the numerical responses of various models using Kirchhoff migration, and to analyze its application to the real data processing. Synthetic traveltime curve was calculated by vidale's algorithm, and various models such as 2 or 3 layer model and irregular topography model are tested to simulate the response of real structure. In order to compare the effect of initial velocity model, true velocity models, inversion results by tomography, smooth velocity models are used as an initial guess. The responses of model data show that the algorithm of this study is more sensitive to initial velocity model than the reflection survey, so choosing a suitable initial velocity model will be the most important thing in real data processing.

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