Journal of the Korean Society of Mineral and Energy Resources Engineers (한국자원공학회지)

The Korean Society of Mineral and Energy Resources Engineers (한국자원공학회)
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Seismic Attribute Analysis and Interpretation with Single Channel Seismic Data of Shallow Marine

단일채널 탄성파 탐사자료의 속성분석 및 정밀해석

  • Ko, Hwi Kyung (Dept. of Energy & Resources Engineering, Korea Maritime Ocean University) ;
  • Ha, Ji Ho (Dept. of Energy & Resources Engineering, Korea Maritime Ocean University) ;
  • Chung, Woo Keen (Dept. of Energy & Resources Engineering, Korea Maritime Ocean University) ;
  • Shin, Sung Ryul (Dept. of Energy & Resources Engineering, Korea Maritime Ocean University)
  • 고휘경 (한국해양대학교 에너지자원공학과) ;
  • 하지호 (한국해양대학교 에너지자원공학과) ;
  • 정우근 (한국해양대학교 에너지자원공학과) ;
  • 신성렬 (한국해양대학교 에너지자원공학과)
  • Received : 2013.10.30
  • Accepted : 2014.02.20
  • Published : 2014.02.28
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Abstract

The single channel seismic survey is very useful in the engineering field, which has the advantages of a low cost and an easy field work due to small scale survey system and simple data processing. For the purpose of enhancing data quality, we applied conventional data processing methods to single channel seismic data such as swell filter, frequency filtering and deconvolution. We carried out seismic attribute analysis which includes reflection strength, first derivative of reflection strength, and instantaneous phase calculated from complex seismic trace. We could not only estimate a geological structure and composition but also could distinguish clearly multiple from reflection events using spectral decomposition. We could successfully get a detailed geological information by means of 3-D seismic data interpretation technique.

단일채널 탄성파탐사(single channel seismic survey)는 소규모의 시스템을 이용하므로 현장작업이 용이하고, 간단한 자료처리 과정을 거쳐 지층단면도를 얻음으로써 비용이 저렴하다는 장점 때문에 엔지니어링 목적의 탐사에 많이 활용되고 있다. 본 연구에서는 단일채널 탄성파 탐사자료의 품질 향상을 위하여 너울필터(swell filter), 주파수필터, 디콘볼루션 등의 자료처리 과정을 적용하였다. 단일채널 탐사자료의 속성분석에서는 복소트레이스로부터 반사강도(reflection strength)와 그 1차 미분(first derivative of reflection strength), 순간위상(instantaneous phase)에 대한 특성을 분석하였다. 스펙트럼 분해(spectral decomposition)를 통하여 지층 내부 구성 물질을 추정 할 수 있었고, 다중반사파를 명확하게 구분하였다. 석유탐사 분야에 활용되는 3차원 탄성파 자료해석기술을 단일채널 탐사자료에 적용하여 엔지니어링 목적에 필요한 지층구조 및 내부 구성 물질을 정확하게 파악할 수 있었다.

Keywords

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