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Multiple wave suppression method based on dual parabolic Radon transformation

A technology of Radon transform and multiple waves, which is applied in the field of multiple wave suppression based on bi-parabolic Radon transform, can solve problems such as artifacts, amplitude leakage, and reflected wave amplitude distortion, so as to weaken artifacts and achieve accurate recovery , Protect the effect of AVO characteristics

Inactive Publication Date: 2014-06-18
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0004] The purpose of the present invention is to provide a multiple wave suppression method based on the bi-term parabolic Radon transform, aiming to solve the problem that the current multiple wave attenuation technology based on the conventional Radon transform cannot simulate the AVO characteristics of seismic data, and the Artifacts and smearing effects, and the amplitude of the reflected wave is distorted once during the inverse transformation, causing amplitude leakage

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  • Multiple wave suppression method based on dual parabolic Radon transformation
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  • Multiple wave suppression method based on dual parabolic Radon transformation

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Embodiment 1

[0046] Figure 10 Shown are a) seismic data with consistent color scales and primary reflections recovered by b) high-resolution conventional Radon transform and c) high-resolution dual-term Radon transform methods, selected from 1.6 s to 4.8 s s, the target reservoir is around 2.7s. from Figure 10 b) and Figure 10 From the primary reflected wave data shown in c), it can be seen that the multiple waves are basically eliminated, and the energy of the primary reflected wave is better recovered, but it is near the 2.7s where the target reservoir is located, that is, the position indicated by the arrow in the figure , there are obvious differences between the two.

[0047] Figure 11 right Figure 10 The data in the rectangle framed by the middle dotted line is enlarged and displayed. It can be seen from the figure that in the area indicated by the arrow in the black frame, the event of the primary reflection wave obtained by the conventional Radon transform is obviously di...

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Abstract

The invention discloses a multiple wave suppression method based on dual parabolic Radon transformation. The method includes the steps that a pre-stack CMP trace gather is processed, an objective function is established, positive Radon transformation is performed on the pre-stack CMP trace gather, one-time reflected waves and multiple waves are separated in the Radon area, and data of the one-time reflected waves are estimated. The method solves the problems that an existing multiple wave attenuation technology based on convectional Radon transformation can not simulate AVO features of seismic data, the false phenomenon is generated in the positive transformation, the smearing exists, the distortion of the amplitude of the one-time reflected waves happens and leakage of the amplitude is caused in the reverse transformation, transformation of the shape of the seismic same-phase axis and the amplitude can be achieved in the Radon area, the movement features and the AVO features of seismic data can be separated better in the Radon area, the false phenomenon generated in the positive transformation process is weakened, accurate restoring of energy of the one-time reflected waves is achieved, the AVO features of the seismic data are protected, and the subsequent seismic inversion and explanation reliability is improved.

Description

technical field [0001] The invention belongs to the field of exploration geophysics, and in particular relates to a method for suppressing multiple waves based on bi-term parabolic Radon transformation. Background technique [0002] Multiples are an important part of seismic data processing. There are many methods to suppress multiples. Among them, the parabolic Radon transform is a widely used method to effectively attenuate multiples. The theoretical basis for multiple wave attenuation based on the parabolic Radon transform is the speed difference between the primary reflected wave and the multiple wave. It can separate the multiple wave and the primary reflected wave in the Radon domain, and then obtain the primary reflected wave data through inverse transformation. . Its essence is the summation of the amplitudes of seismic events in different curvature directions. It can transform a point in the Ladong domain into a parabola in the time-offset domain, but it is only a ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/36
Inventor 王保丽印兴耀张广智
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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