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A well-controlled amplitude-preserving high-resolution seismic data processing method

A high-resolution, seismic data technology, applied in seismic signal processing, seismology for logging records, electrical digital data processing, etc. Achieve the effect of eliminating phase distortion, high resolution, high resolution and signal-to-noise ratio

Active Publication Date: 2017-03-08
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0006] When we have performed inverse Q filter amplitude compensation on the seismic wave, if we use the amplitude attenuation factor of the full-frequency signal inversion of the vertical seismic profile data with zero well-source spacing to restore the amplitude of the seismic data after the inverse Q filter amplitude compensation, it will inevitably be Causes excessive energy compensation, which fails to achieve the purpose of amplitude-preserving processing of seismic data

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  • A well-controlled amplitude-preserving high-resolution seismic data processing method

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Embodiment Construction

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0044] The present invention proposes a well-controlled amplitude-preserving high-resolution seismic data processing method, such as figure 1 shown. The method includes:

[0045] Step 101): Obtain the seismic data of the target area, and select representative data of the target area from the seismic data of the target area;

[0046] Step 102): Acquiring the layer velocity volume of the target area according to the seismic data of the target area;

[0047] S...

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Abstract

The invention relates to a well-control amplitude-preservation high-resolution seismic data processing method, which comprises the following steps of selecting seismic data of a target area; obtaining an optimized amplitude compensation gain margin; performing inverse Q filtering amplitude compensation on the seismic data of the target area to obtain an optimized layer Q body by utilizing the optimized amplitude compensation gain margin; performing inverse Q filtering amplitude compensation on the seismic data of the target area by utilizing the optimized amplitude compensation gain margin and the optimized layer Q body; performing inverse Q filtering phase compensation on the seismic data of the target area by utilizing the layer Q body and a layer velocity body of the target area; performing inverse Q filtering amplitude compensation on zero- wellhead spacing vertical seismic profiling (VSP) data by utilizing the optimized amplitude compensation gain margin and the optimized layer Q body; performing wave field separation on the VSP data subjected to inverse Q filtering amplitude compensation, and obtaining the total energy of downgoing direct waves; performing inversion on the total energy of the downgoing direct waves to obtain an amplitude recovery factor; performing amplitude recovery on the target area subjected to inverse Q filtering amplitude and phase compensation by utilizing the amplitude recovery factor.

Description

technical field [0001] The invention relates to the technical field of seismic exploration data processing, in particular to a well-controlled amplitude-preserving high-resolution seismic data processing method. Background technique [0002] The energy loss of seismic waves includes transmission energy loss, spherical diffusion energy loss, and energy loss related to formation quality factor Q absorption attenuation. Among them, transmission energy loss and spherical diffusion energy loss are independent of frequency. The energy loss caused by Q absorption attenuation is proportional to the frequency, and the energy loss at high frequency is more serious than that at low frequency. With the gradual increase in the precision requirements for seismic exploration, the need for seismic wave amplitude maintenance and high-resolution processing is becoming more and more urgent. [0003] In the method of improving the resolution, the layer Q extracted from the vertical seismic pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/50G06F19/00
Inventor 张固澜王熙明李彦鹏张彦斌容娇君
Owner BC P INC CHINA NAT PETROLEUM CORP
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