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Velocity Model Building using Waveform Inversion from Single Channel Engineering Seismic Survey

탄성파 파형역산을 이용한 엔지니어링 목적의 단일채널 탄성파 탐사자료에서의 속도모델 도출

  • Choi, Yeon Jin (Department of Ocean Energy and Resources Engineering, Korea Maritime and Ocean University) ;
  • Shin, Sung Ryul (Department of Ocean Energy and Resources Engineering, Korea Maritime and Ocean University) ;
  • Ha, Ji Ho (Department of Ocean Energy and Resources Engineering, Korea Maritime and Ocean University) ;
  • Chung, Woo Keen (Department of Ocean Energy and Resources Engineering, Korea Maritime and Ocean University) ;
  • Kim, Won Sik (Petroleum & Marine Research Division)
  • 최연진 (해양대학교 에너지자원공학과) ;
  • 신성렬 (해양대학교 에너지자원공학과) ;
  • 하지호 (해양대학교 에너지자원공학과) ;
  • 정우근 (해양대학교 에너지자원공학과) ;
  • 김원식 (한국지질자원연구원 석유해저연구본부)
  • Received : 2014.10.10
  • Accepted : 2014.11.18
  • Published : 2014.11.30

Abstract

Recently, single channel seismic survey for engineering purpose have been used widely taking advantage of simple processing. However it is very difficult to obtain high fidelity subsurface image by single channel seismic due to insufficient fold coverage. Recently, seismic waveform inversion in multi channel seismic survey is utilized for accurate subsurface imaging even in complex terrains. In this paper, we propose the seismic waveform inversion algorithm for velocity model building using a single channel seismic data. We utilize the Gauss-Newton method and assume that subsurface model is 1-Dimensional. Seismic source estimation technique is used and offset effect is also corrected by removing delay time by offset. Proposed algorithm is verified by applying modified Marmousi2 model, and applied to field data set obtained in port of Busan.

Acknowledgement

Grant : 한계 유가스전 탐사시스템 및 유망구조도출 기술개발사업, 엔지니어링 규모 해저 탄성파탐사 3D 시스템 개발

Supported by : 한국지질자원연구원, 한국연구재단

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