发明名称 |
PRESTACK EGS MIGRATION METHOD FOR SEISMIC WAVE MULTI-COMPONENT DATA |
摘要 |
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. |
申请公布号 |
WO2016060513(A1) |
申请公布日期 |
2016.04.21 |
申请号 |
WO2015KR10951 |
申请日期 |
2015.10.16 |
申请人 |
KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES |
发明人 |
KIM, BYOUNG YEOP;BYUN, JOONG MOO;SEOL, SOON JEE;LEE, HO YOUNG |
分类号 |
G01V1/28;G01V1/30;G06T11/00;G06T17/05 |
主分类号 |
G01V1/28 |
代理机构 |
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