지구물리와물리탐사 (Geophysics and Geophysical Exploration)

  • 제25권3호
  • /
  • Pages.129-139
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  • 2022
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  • 1229-1064(pISSN)
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  • 2384-051X(eISSN)
한국지구물리·물리탐사학회 (Korean Society of Earth and Exploration Geophysicists)
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초고해상 탄성파 탐사를 위한 디지털 스트리머 시스템 개발

Development of Digital Streamer System for Ultra-high-resolution Seismic Survey

  • 신정균 (한국지질자원연구원 포항지질자원실증연구센터) ;
  • 하지호 (한국지질자원연구원 포항지질자원실증연구센터) ;
  • 윤성웅 ((주)에이더블테크놀러지) ;
  • 임태성 ((주)에이더블테크놀러지) ;
  • 임관성 ((주)에이더블테크놀러지)
  • 투고 : 2022.06.13
  • 심사 : 2022.08.01
  • 발행 : 2022.08.31
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초록

초고해상 탄성파 탐사를 위한 아날로그 기반의 스트리머는 수중에서의 추가적인 잡음 유입이 가능하며 상호 연결을 통한 규격 확장이 불가능하다. 국내 연구기관 등을 중심으로 외산 디지털 스트리머가 도입되어 활용되고 있으나 비용이 높으며 원활한 유지보수가 어렵다. 이에 본 연구에서는 천부 지질구조에 대한 높은 해상도의 영상화가 가능한 초고해상 디지털 스트리머 국산화 연구를 진행하였다. 연구개발을 통하여 최대 64채널 데이터에 대한 24 bit급 10 kHz 디지털 샘플링이 가능한 디지털 스트리머가 개발되었다. 시스템의 다양한 정량적인 규격은 벤치마크 모델인 지오메트릭스(Geometrics)사의 지오일 스트리머에 근접하게 설계되어 개발이 이루어졌고 시스템을 구성하는 모듈의 개수를 대폭 축소함으로써 개발 비용을 절감하고 간편한 활용이 가능하도록 하였다. 본 연구를 통해 개발된 스트리머 시스템은 2022년 4월 포항 영일만항 인근해역에서 이루어진 실 해역 시험을 통하여 현장 적용성에 대한 검토가 이루어졌다.

Analog-based streamers for ultra-high-resolution seismic surveys are capable of additional noise ingress in water, but the specifications cannot be expanded through interconnections. Foreign-produced digital streamers have been introduced and used primarily at domestic research institutes; however, the cost is high and smooth maintenance is challenging. This study investigates the localization of ultra-high-resolution digital streamers capable of high-resolution imaging of a geological structure. A digital streamer capable of 24-bit, 10 kHz digital sampling of up to 64 channel data was developed through research and development. Various quantitative specifications of the system were designed and developed close to the benchmark model, Geometrics' GeoEel streamer, and the number of modules that make up the system was drastically reduced, reducing development costs and making it easier to use. The field applicability of the developed streamer system was evaluated in an in situ experiment conducted in the waters around the Port of Yeong-il Bay in Pohang in April 2022.

키워드

과제정보

본 연구는 한국지질자원연구원 기본사업인 '해저탐사선 운항 안정화 및 연근해 탐사기술 개발(22-3313, GP2020-026)'과제의 일환으로 수행되었습니다.

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