Surface wave pressing method

A surface wave and polarization filtering technology, applied in the field of surface wave suppression

Active Publication Date: 2010-12-15
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI +1
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  • Abstract
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Problems solved by technology

[0015] The technical problem to be solved by the present invention is to provide a new surface wave suppression method to obtain the instantaneous information of the seismic envelope without dividing the time window during analysis, thereby overcoming the problems existing in the current polarization analysis method and effectively Partial and body waves

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Embodiment Construction

[0052] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0053] Principle of invention

[0054] Polarization analysis is a commonly used technique in natural seismic signal processing. In order to analyze the seismic waves in the X-Z plane, Taner et al. (Taner M T, Koehler F, and Sheriff R E., 1979, Complex seismic trace analysis. Geophysics, 44(6): 1041-1063) first proposed that the recorded real seismic component x r (t), z r(t) respectively transformed into analytical signals (Taner M T, Koehler F, and Sheriff R E., 1979, Complex seismic trace analysis. Geophysics, 44(6): 1041-1063) (Morozov L B, Smithson S B., 1996, Instantaneous polarization attributes and directional filtering. Geophysics, 61(3): 872-881):

[0055] X ...

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Abstract

The invention relates to the field of seismic exploration, in particular to a surface wave pressing method which comprises the steps of: carrying out Hilbert conversion on single-component seismic signals; forming a plurality of signals by using the signals after Hilbert conversion; computing corresponding elliptical polarizability according to the signals; and pressing according to the obtained elliptical polarizability to obtain pressed signals. By adopting the surface wave pressing method of the invention in a theoretical simulation test, Rayleigh surface waves after instant polarization filtering can be well attenuated, and reflected waves are obvious; generally indicated by the application effect of outdoor actual data, by adopting the surface wave pressing method of the invention, the energy of surface waves can be well pressed and the pressed surface waves can better keep the true amplitude of a seismic record.

Description

technical field [0001] The invention relates to the field of seismic exploration, in particular to a surface wave suppression method. Background technique [0002] In the exploration of fossil energy such as oil, natural gas, coal, and coalbed methane, seismic exploration technology based on explosive sources (artificial sources) is one of the key technologies to obtain underground structure and lithology information and identify the existence of oil and gas and other energy sources. Conventional seismic exploration technology mainly uses the excitation and propagation of longitudinal waves and the reception of single-component seismic signals to achieve the purpose of exploring underground elastic wave field anomalies; with the development of seismic exploration technology and the increasing difficulty of energy exploration such as oil and gas, simple It is difficult to obtain information on the lithology and fluid properties of underground media by relying on P-waves, and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/36
Inventor 王赟芦俊
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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