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Patent Searching and Data


Title:
PRESTACK EGS MIGRATION METHOD FOR SEISMIC WAVE MULTI-COMPONENT DATA
Document Type and Number:
WIPO Patent Application WO/2016/060513
Kind Code:
A1
Abstract:
The present invention relates to a one-way wave equation prestack depth migration method using an elastic generalized-screen (EGS) wave propagator capable of efficiently expressing the movement of an elastic wave passing through a mutual mode conversion between a P-wave and an S-wave while propagating boundary surfaces of an underground medium, by expanding, to an elastic wave equation, a conventional scalar generalized-screen (SGS) technique capable of quickly calculating the propagation of a wave in a medium in which there is a horizontal speed change, and according to the present invention, provided is a prestack EGS migration method for seismic wave multi-component data, which: can calculate a wave field with higher accuracy in a medium having a complex structure by expanding up to a second term of a Taylor series expansion of a vertical slowness term of a propagator; includes a mode separation operator in the propagator so as to directly use a shot gather as a migration input, without the need to separate multi-component data into a P-wave and an S-wave, enabling P-wave and S-wave image sections to be generated; and is configured to improve the quality of an S-wave migration image by correcting a polarity conversion in a wave number-frequency domain prior to S-wave imaging.

Inventors:
KIM BYOUNG YEOP (KR)
BYUN JOONG MOO (KR)
SEOL SOON JEE (KR)
LEE HO YOUNG (KR)
Application Number:
PCT/KR2015/010951
Publication Date:
April 21, 2016
Filing Date:
October 16, 2015
Export Citation:
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Assignee:
KOREA INST GEOSCIENCE & MINERA (KR)
International Classes:
G01V1/28; G01V1/30; G06T11/00; G06T17/05
Domestic Patent References:
WO2011100077A12011-08-18
Foreign References:
KR101355106B12014-01-22
KR20140021584A2014-02-20
KR20100029214A2010-03-16
Other References:
KIM, BYEONG YEOP.: "Prestack Elastic Generalized-Screen Migration for Multicomponent Data", DOCTORAL THESIS., August 2012 (2012-08-01)
Attorney, Agent or Firm:
KIM, JUNG SU (KR)
김정수 (KR)
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