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Research Paper

A Study on Parallel 3D Elastic Wave Modeling Using Flux-corrected Transport

플럭스 보정기법을 이용한 병렬 3차원 탄성파 모델링 연구

Ju-Won Oh1
,
Dae-Sik Kim23
,
Won-Ki Kim4*
오 주원1
,
김 대식23
,
김 원기4*
1Associate Professor, Department of Mineral Resources and Energy Engineering, Jeonbuk National University, Jeonju, Korea
2M.S Course, Department of Mineral Resources and Energy Engineering, Jeonbuk National University, Jeonju, Korea
3M.S Course, KIGAM Pohang Branch, Korea Institute of Geoscience and Mineral Resources, Pohang, Korea
4Senior Researcher, Maritime Technology Research Institute, Agency for Defense Development, Changwon, Korea
1전북대학교 자원․에너지공학과 부교수
2전북대학교 자원․에너지공학과 석사과정
3한국지질자원연구원 포항지질자원실증연구센터 석서과정
4국방과학연구소 해양기술연구원 선임연구원
*Corresponding Author
28 February 2022. pp. 42-58
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Abstract

In this study, we propose an efficient parallel 3D elastic wave modeling algorithm that is suitable for simulating large-scale 3D ocean-bottom seismic data. The proposed parallel 3D seismic modeling algorithm, which is based on domain decomposition using high-performance computing techniques in multi-node and multi-core cluster environments, can provide numerical solutions efficiently. By integrating flux-corrected transport in parallel 3D elastic wave modeling, our algorithm provides kinematically reliable S-wave motions with less numerical dispersions using larger grid sampling, which enables simulating large-scale 3D elastic wave propagations. We first demonstrate the mechanism of the flux-corrected transport in 2D elastic wave propagation and then extend the proposed methods to large-scale 3D elastic problems on a two-layered model. Finally, we verify the applicability of the proposed algorithm to a more realistic 3D elastic Earth model constructed from the Volve oilfield in the North Sea.

Keywords
3D elastic wave modeling
flux-corrected transport (FCT)
numerical dispersion
high performance computing (HPC)

본 연구에서는 대규모 3차원 해저면 탐사자료 구현을 위한 효율적인 병렬 3차원 탄성파 모델링 알고리듬을 제안한다. 제안된 병렬 탄성파 모델링 기술은 다중노드-다중코어 클러스터 환경에서 영역분할법 기반의 고성능 컴퓨팅 기술을 기반으로 3차원 탄성파동방정식의 수치해를 계산하고, 플럭스 보정기법을 적용하여 상대적으로 큰 공간격자를 사용하더라도 P파와 S파의 운동학적 특성(도달시간)을 정확하게 구현할 수 있다는 장점이 있어서 대규모 3차원 다성분 해저면 탐사자료를 구현하기에 적합하다. 2차원 모델에 대해서 플럭스 보정기법의 원리를 소개하고, 3차원 2층 모델에 대한 적용성을 검토하였다. 마지막으로 북해 볼브 유전 지역의 속도 모델에 대해 제안한 기술을 적용함으로써 대규모 3차원 해저면 탐사자료 구현에 활용가능한지 검토하였다.

키워드
3차원 탄성파 모델링
플럭스 보정 기법
수치 분산
고성능 컴퓨팅
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Information
  • Publisher :The Korean Society of Mineral and Energy Resources Engineers
  • Publisher(Ko) :한국자원공학회
  • Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
  • Journal Title(Ko) :한국자원공학회지
  • Volume : 59
  • No :1
  • Pages :42-58
  • Received Date : 2022-01-24
  • Revised Date : 2022-02-04
  • Accepted Date : 2022-02-22
  • DOI :https://doi.org/10.32390/ksmer.2022.59.1.042
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