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http://dx.doi.org/10.7582/GGE.2011.14.3.227

Imaging Fractures by using VSP Data on Geothermal Site  

Lee, Sang-Min (Dept. of Natural Resources and Geoenvironmental Engineering, Hanyang Univ.)
Byun, Joong-Moo (Dept. of Natural Resources and Geoenvironmental Engineering, Hanyang Univ.)
Song, Ho-Cheol (Dept. of Natural Resources and Geoenvironmental Engineering, Hanyang Univ.)
Park, Kwon-Gyu (Korea Institute of Geoscience and Mineral Resources)
Lee, Tae-Jong (Korea Institute of Geoscience and Mineral Resources)
Publication Information
Geophysics and Geophysical Exploration / v.14, no.3, 2011 , pp. 227-233 More about this Journal
Abstract
Attention has been focused on geothermal energy as an alternative energy because it is continuously operable without external supply. Most of geothermal anomalies in Korea are related to deep circulation of groundwater through a fracture system in granite area. Therefore it is very important to understand the distribution of the fracture system which is the main channel of ground water. In this research, we constructed the velocity models with a fracture system and the layered sediments, respectively, and generated synthetic data sets with them to verify the presented vertical seismic profiling (VSP) preprocessing scheme. We compared the results from conventional VSP preprocessing flow to those from VSP preprocessing flow considering fracture system. We noticed that the preprocessing flow considering fracture system retains more sufficient signal including down-going wave than conventional preprocessing. In addition, we applied 3D VSP prestack phase screen migration to the preprocessed reversed VSP (RVSP) data from Seokmo Island so that we were able to image fracture structure of the geothermal site in Seokmo Island.
Keywords
fracture system; VSP data preprocessing; 3D prestack phase screen migration;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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