• Title/Summary/Keyword: 최소위상 예측 디콘볼루션

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Optimal Rejection of Sea Bottom, Peg-leg and Free-surface Multiples for Multichannel Seismic Data on South-eastern Sea, Korea (동해 남동해역 다중채널 해양탄성파 탐사자료의 해저면, 페그-레그 및 자유해수면 다중반사파 제거 최적화 전산처리)

  • Cheong, Snons;Koo, Nam-Hyung;Kim, Won-Sik;Lee, Ho-Young;Shin, Won-Chul;Park, Keun-Pil;Kim, Jin-Ho
    • Geophysics and Geophysical Exploration
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    • v.12 no.4
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    • pp.289-298
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    • 2009
  • Optimal data processing parameters were designed to attenuate multiples in seismic data acquired in the south-eastern area of the East Sea, in 2008. Bunch of multiples caused by shallow sea water depth were perceived periodically up to two way travel time of 1,750 ms at every 250 ms over seismic traces. We abbreviated sea bottom multiple as SBM, Peg-leg multiple as PLM, and free-surface multiple as FSM. To attenuate these multiples, seismic data processing flow was constructed including NMO, stack, minimum phase predictive deconvolution filter and wave equation multiple rejections (WEMR). Prevalent multiples were suppressed by predictive deconvolution and remaining multiples were attenuated by WEMR. We concluded that combining deconvolution with WEMR was effective to a seismic data of study area. Derived parameter can be applied to the seismic data processing on adjacent survey area.

Optimal Determination of Marine Seismic Data Processing Parameter for Domi-Sediment Basin (도미퇴적분지 해양탄성파 탐사자료 최적 전산처리 변수도출)

  • Cheong, Snons;Kim, Won-Sik;Koo, Nam-Hyung;Yoo, Dong-Geun;Lee, Ho-Young;Shin, Won-Chul;Park, Keun-Pil
    • Geophysics and Geophysical Exploration
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    • v.11 no.4
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    • pp.279-285
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    • 2008
  • Korea Institute of Geoscience & Mineral Resources (KIGAM) carried out 2 dimensional multi-channel seismic surveys for Domi-Basin of east-southern part of Jeju Island, South Sea, Korea in 2007. The purpose of this survey is to investigate the structure of acoustic basement and the potential of energy resources in the Korean shelf. It is essential to produce fine stack and migration section to understand the structure of basement. However a basement can not be clearly defined where multiples exist between sea surface and seafloor. This study aimed at designing the optimal data processing parameter, especially to eliminate the peg-leg multiples. Main data processing procedure is composed of minimum phase predictive deconvolution, velocity analysis and Radon filter. We tested the efficiency of processing parameter from stack sections of each step. Our results confirmed that processing parameters are suitable for the seismic data of Domi-Basin.