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With a high-resolution hyperbolic Radon transform wave field separation

Author: ChenJianWei
Tutor: LiQingChun
School: Chang'an University
Course: Earth Exploration and Information Technology
Keywords: Hyperbolic Radon transform Wavefield separation Conjugate Gradient Method High-resolution Multiwave and multicomponent
CLC: P631.4
Type: Master's thesis
Year: 2005
Downloads: 428
Quote: 10
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Abstract


Multi - wave and multi - component seismic exploration has many advantages than the traditional single - longitudinal wave exploration , collected longitudinal and shear wave data can form a stacked section is conducive to structural imaging . More valuable is that it can be used to extract the lithology , reservoir , fracture distribution geophysical parameters and stress field . The separation of the wave field is an important part of the multi - wave and multi - component seismic data processing . Radon transform has been widely used in the processing and interpretation of seismic data , with good results in the identification, seismic events wavefield separation , suppression of multiples , velocity analysis . Linear Radon transform , parabolic Radon transform , or hyperbolic Radon transform ever using least squares inversion method . The method of least squares in the lower resolution and computational efficiency , in this regard is still worthy of further study. This article focuses on the impact of resolution Radon transform of factors , as well as to solve this factor approach to achieve high resolution Radon transform . Select a higher resolution hyperbolic Radon transform method , in order to overcome the shortcomings of slow calculated using the conjugate gradient method to solve the sparse matrix , it is neither affect the resolution but also improves the computing speed . Different longitudinal wave and converted wave propagation velocity and intercept time , using high-resolution hyperbolic Radon transform wave field separation and analysis the transform selected parameter values ??as well as the end effect phenomenon , for example , the higher the frequency , said greater the spacing, the more prone to spatial aliasing , the lower the resolution . Given model and application instance , studies have shown that , using the conjugate gradient method for solving the high-resolution hyperbolic Radon transform resolution and computational efficiency of the algorithm are higher , better wavefield separation .

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
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