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dc.contributor.author설순지-
dc.date.accessioned2018-03-09T02:09:29Z-
dc.date.available2018-03-09T02:09:29Z-
dc.date.issued2013-02-
dc.identifier.citationMARINE AND PETROLEUM GEOLOGY, 권: 47, 페이지: 204-213en_US
dc.identifier.issn0264-8172-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0264817213001554?via%3Dihub-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/43961-
dc.description.abstractGas hydrate has been receiving much attention in recent years as the demand for energy has increased. Before an economic evaluation of the feasibility of producing gas hydrate can be made, an assessment of reserves must be completed. To evaluate a reserve of gas hydrate, we should accurately know the depth interval of the gas hydrate-bearing region and the concentration of gas hydrate in it. Because vertical seismic profiling (VSP) data can provide higher resolution than surface seismic data, we can improve the reliability of the characterization of the gas hydrate-bearing region using VSP data along with surface seismic data.In this study, we obtained interval velocities and corridor stacked sections from zero-offset VSP data acquired at the UBGH2-6 and UBGH2-10 wells in gas hydrate-bearing zones of the Ulleung Basin, East Sea of Korea. The interval velocities obtained from the zero-offset VSP data agreed well overall with sonic logs and showed a significant decrease at the depth beneath the gas hydrate stability zone. Most reflection events in the corridor stacked section matched well those in the surface migrated seismic section. Additionally, we computed the concentration of the gas hydrate from the log data using a three-phase Blot-type equation, and the result agreed well with the concentration calculated from the resistivity log using Archie's equation. (C) 2013 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipThis work was supported by the Korea Institute of Geoscience and Mineral Resources (KIGAM), Ministry of Knowledge Economy (MKE) and Gas Hydrate R/D Organization (GHDO).en_US
dc.language.isoenen_US
dc.publisherElsevier Science B.V., Amsterdam.en_US
dc.subjectUlleung Basinen_US
dc.subjectGas hydrate concentrationen_US
dc.subjectThree phase Biot-type equationen_US
dc.subjectZero-offset VSPen_US
dc.titleZero-offset vertical seismic profiling survey and estimation of gas hydrate concentration from borehole data from the Ulleung Basin, Koreaen_US
dc.typeArticleen_US
dc.relation.volume47-
dc.identifier.doi10.1016/j.marpetgeo.2013.06.011-
dc.relation.page204-213-
dc.relation.journalMARINE AND PETROLEUM GEOLOGY-
dc.contributor.googleauthorTak, Heewon-
dc.contributor.googleauthorByun, Joongmoo-
dc.contributor.googleauthorSeol, Soon Jee-
dc.contributor.googleauthorYoo, Dong Geun-
dc.relation.code2013011195-
dc.sector.campusS-
dc.sector.daehakRESEARCH INSTITUTE[S]-
dc.sector.departmentPETROLEUM AND MINERAL RESEARCH INSTITUTE-
dc.identifier.pidssjdoolly-
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