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Seismic instantaneous attribute extraction method based on phase space filtering strategy

An attribute extraction and phase space technology, applied in the signal processing field of geophysical exploration, can solve the problems of low instantaneous attribute accuracy and noise sensitivity, etc.

Active Publication Date: 2015-09-16
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0008] The commonly used method of estimating instantaneous parameters based on Hilbert transform is very sensitive to noise, and due to the truncation effect of the filter, the accuracy of the calculated instantaneous properties is low

Method used

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  • Seismic instantaneous attribute extraction method based on phase space filtering strategy
  • Seismic instantaneous attribute extraction method based on phase space filtering strategy
  • Seismic instantaneous attribute extraction method based on phase space filtering strategy

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Embodiment Construction

[0048] Below by specific embodiment and accompanying drawing, the scheme of the present invention is described in detail:

[0049] Calculation of Instantaneous Properties by Wavelet Transform

[0050] The wavelet transform of real seismic trace s(t) is defined as

[0051] W ψ ( t , a ) ≡ 1 a ∫ - ∞ + ∞ s ( τ ) ψ * ( τ - t a ) dτ . - - - ( 21 )

[0052] When the basic wavelet ψ(t) is an analytic wavelet, ...

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Abstract

The invention discloses a seismic instantaneous attribute extraction method based on a phase space filtering strategy. In a wavelet transformation domain, an area of the effective signal energy distribution is adaptively determined. Based on that, a noised-signal instantaneous attribute analysis method is provided by using a relation of wavelet transformation and Hilbert transformation. In the invention, a quantitative index of measuring instantaneous-attribute anti-noise performance is provided; through calculating instantaneous attributes of a synthetic seismogram of different signal to noise ratios, anti-noise performance of different methods is contrasted. A calculating result of the method in the invention possesses good anti-noise performance and precision. The method is applied to real data so that a reservoir characteristic can be clearly depicted.

Description

technical field [0001] The invention belongs to the field of signal processing in geophysical exploration, relates to the extraction of instantaneous attributes of seismic data, in particular to a method for extracting instantaneous attributes of earthquakes based on a phase space filtering strategy. Background technique [0002] Seismic attributes refer to the geometry, kinematics, dynamics, and statistics of seismic waves derived from seismic data through mathematical transformation. These features can visually reflect the shape of the reservoir and its oil and gas. In the 1970s, seismic attribute analysis was introduced into seismic interpretation. Since the 1990s, due to the need for reservoir description and three-dimensional data volume interpretation, seismic attribute analysis technology has developed rapidly. widely used. At present, there is no recognized classification of seismic attributes. According to the physical meaning, seismic attributes can be divided in...

Claims

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Application Information

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IPC IPC(8): G01V1/28
Inventor 高静怀王平
Owner XI AN JIAOTONG UNIV
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