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An inverse scattering series method for attenuating elastic multiples from multicomponent land and ocean bottom seismic data Matson, Kenneth Howell
Abstract
A method exists for marine seismic data which removes all orders of free surface multiples and suppresses all orders of internal multiples while leaving primaries intact. This method is based on the inverse scattering series and makes no assumptions about the subsurface earth model. The marine algorithm assumes that the sources and receivers are located in the water column. In the context of land and ocean bottom data, the sources and receivers are located on or in an elastic medium. This opens up the possibility of recording multicomponent seismic data. Because both compressional (P) and shear (S) primaries are recorded in multicomponent data, it has the potential for providing a more complete picture of the subsurface. Coupled with the benefits of the P and S primaries are a complex set of elastic free surface and internal multiples. In this thesis, I develop an inverse scattering series method to attenuate these elastic multiples from multicomponent land and ocean bottom data. For land data, this method removes elastic free surface multiples. For ocean bottom data, multiples associated with the top and bottom of the water column are removed. Internal multiples are strongly attenuated for both data types. In common with the marine formulation, this method makes no assumptions about the earth below the sources and receivers, and does not affect primaries. The latter property is important for amplitude variation with offset analysis (AVO). The theory for multiple attentuation requires four component (two source, two receiver) data, a known near surface or water bottom, near offsets, and a known source wavelet. Tests on synthetic data indicate that this method is still effective using data with less than four components and is robust with respect to errors in estimating the near surface or ocean bottom properties.
Item Metadata
Title |
An inverse scattering series method for attenuating elastic multiples from multicomponent land and ocean bottom seismic data
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1997
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Description |
A method exists for marine seismic data which removes all orders of free surface multiples
and suppresses all orders of internal multiples while leaving primaries intact. This method
is based on the inverse scattering series and makes no assumptions about the subsurface
earth model. The marine algorithm assumes that the sources and receivers are located
in the water column. In the context of land and ocean bottom data, the sources and
receivers are located on or in an elastic medium. This opens up the possibility of recording
multicomponent seismic data. Because both compressional (P) and shear (S) primaries are
recorded in multicomponent data, it has the potential for providing a more complete picture
of the subsurface. Coupled with the benefits of the P and S primaries are a complex set
of elastic free surface and internal multiples. In this thesis, I develop an inverse scattering
series method to attenuate these elastic multiples from multicomponent land and ocean
bottom data. For land data, this method removes elastic free surface multiples. For
ocean bottom data, multiples associated with the top and bottom of the water column
are removed. Internal multiples are strongly attenuated for both data types. In common
with the marine formulation, this method makes no assumptions about the earth below
the sources and receivers, and does not affect primaries. The latter property is important
for amplitude variation with offset analysis (AVO). The theory for multiple attentuation
requires four component (two source, two receiver) data, a known near surface or water
bottom, near offsets, and a known source wavelet. Tests on synthetic data indicate that
this method is still effective using data with less than four components and is robust with
respect to errors in estimating the near surface or ocean bottom properties.
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Extent |
19696269 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-03-31
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0087987
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1997-05
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.