Simulation of elastic wave propagation in fractured media with multi-scale finite elements

Yongchae Cho*, Richard Gibson, Maria Vasilyeva, Yalchin Efendiev

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

We apply the Generalized Multi-scale Finite Element Method (GMsFEM) to simulate seismic wave propagation in fractured media. Fractures are represented explicitly on a fine-scale triangular mesh, and they are incorporated using the linear-slip model. The motivation for applying GMsFEM is that it can reduce computational costs by utilizing basis functions computed from the fine-scale fracture model to simulate propagation on a coarse grid. We first apply the method to a simple model that has a uniform distribution of parallel fractures. At low frequencies, the results could be predicted using a homogeneous, effective medium, but at higher frequencies GMs- FEM results allow simulation of more complex, scattered wavefields generated by the fractures. The second, complex model has two fracture corridors in addition to a few sparsely distributed fractures. Simulations compare scattered wavefields for different acquisition geometries. GMsFEM allows a reduction of computation of about 90% compared to a conventional finite element result computed directly from the fine-scale grid.

Original languageEnglish (US)
Pages (from-to)4003-4007
Number of pages5
JournalSEG Technical Program Expanded Abstracts
Volume35
DOIs
StatePublished - Jan 1 2016
EventSEG International Exposition and 86th Annual Meeting, SEG 2016 - Dallas, United States
Duration: Oct 16 2011Oct 21 2011

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

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