Method for deconvolution of high-efficiency earth's surface-consistent

A consistent and deconvolution technology, applied in the field of geophysical exploration, can solve problems such as high-frequency anomalies, and achieve the effects of improving efficiency, saving memory, and saving memory space

Active Publication Date: 2011-05-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some directly truncate the power spectrum to save memory and calculation. This method is easy to cause high-frequency abnormalities.

Method used

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  • Method for deconvolution of high-efficiency earth's surface-consistent
  • Method for deconvolution of high-efficiency earth's surface-consistent
  • Method for deconvolution of high-efficiency earth's surface-consistent

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Embodiment Construction

[0046] specific implementation plan

[0047] The present invention collects pre-stack shots or CMP seismic records earlier, intercepts seismic records with conventional methods, generally selects the time window section with high signal-to-noise ratio of seismic records, and performs Fourier transform on seismic record segments with conventional methods, and converts seismic records from Transform the time domain to the frequency domain, and calculate the power spectrum, and then take the logarithm of each sampling point value of the power spectrum in the form of a lookup table to obtain the logarithmic power spectrum, transform the seismic record segment into a rematch spectrum, and convert the rematch spectrum truncated, followed by a surface-consistent decomposition.

[0048] Take the following specific steps:

[0049] 1) Collect pre-stack shots or CMP seismic records.

[0050] Seismic records can be set as x(t), t=1,...,N,

[0051] 1, ..., N are sampling points,

[005...

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Abstract

The invention relates to a method of the disconsolation of the earth-surface consistence during the seismic data processing. The pre-stack shot gathers or CMP seismic record is collected; the seismic record is intercepted by using a conventional method; a time window section with a higher signal noise ratio in the seismic record is generally selected; the Fourier transform of seismic record section is made through the conventional method; the seismic record is changed from a time domain to a frequency domain; and the power spectrum is calculated. The invention is characterized in that each sampling point value of the frequency domain is taken logarithm in a lookup table way; the logarithm frequency domain is obtained; the seismic record section is changed into a cepstrum which is intercepted; then the surface consistence is decomposed. The invention fully preserved the information of the seismic wavelet, which saves the memory space; the decomposed sampling points for surface consistence are reduced, which saves the post processing memory; the seismic data with a high resolution can be obtained; and the difference between each shot point and the detection point is eliminated.

Description

technical field [0001] The invention relates to geophysical prospecting technology, belongs to the technical category of improving the resolution in the process of seismic data processing, and is a high-efficiency surface monitoring system for improving the resolution of seismic data and eliminating the differences between seismic recording shot points, receiver points and CMP. A method for consistent deconvolution. Background technique [0002] In geophysical exploration technology, the recorded data needs to be processed, and the deconvolution technology under the constraint of surface consistency is a conventional processing method for seismic data processing. In areas with undulating surface and complex surface structure, when the location of the source and receiving point changes, the excitation conditions and receiving conditions will change, which will have different effects on the seismic records. The consistent deconvolution of the surface can eliminate this effect....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/30G01V1/36G01V1/22
Inventor 周兴元任晓乔
Owner BC P INC CHINA NAT PETROLEUM CORP
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