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Coherent energy spectrum acquisition method

An acquisition method and energy spectrum technology, applied in seismic signal processing and other directions, can solve the problems of unreliable coherent energy spectrum values ​​and cannot reflect the relative relationship well, so as to reduce the amount of calculation, improve the calculation speed, and improve the accuracy. Effect

Inactive Publication Date: 2011-07-20
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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Problems solved by technology

;The amplitude value of the point adjacent to the point is used as the amplitude value of the point by rounding, so that the obtained coherent energy spectrum value of the point becomes unreliable; the purpose of obtaining the coherent energy spectrum is to reflect the value of the point The relative relationship of values, and the original result of direct output calculation can not reflect such a relative relationship; because the true color is used when displaying the coherent energy spectrum, it cannot reflect such a relative relationship well

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Embodiment Construction

[0027] Hereinafter, the coherent energy spectrum acquisition method according to the embodiment will be described in detail.

[0028] First, field exploration and acquisition are performed by a method known in the art to obtain the original collected data, and then, after seismic data processing, seismic data capable of coherent energy spectrum calculation are obtained. For example, the seismic data may be data before or after superimposition. Horizontal superposition refers to the reflection of multiple excitation points and multiple receiving points in a certain underground position in the process of seismic exploration, and the signals from different excitation points of the same reflection point in the ground received by different receiving points are corrected after dynamic correction. Stack up.

[0029] Then, in the method for acquiring the coherent energy spectrum according to the embodiment, the "sparse point" method is used to calculate the coherent energy spectrum value....

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Abstract

The invention provides a coherent energy spectrum acquisition method. The method comprises the following steps of: calculating coherent energy spectrum values by selecting the seismic data of part of sampling points at certain intervals among a plurality of sampling points in each seismic channel from the seismic data from multiple seismic channels in the seismic data of a plurality of seismic channels by using a plurality of sampling points from each seismic channel according to certain intervals to calculate coherent energy spectrum values; in the calculation process, calculating coherent energy spectrum values by adopting a neighboring channel, a neighboring point, an inter-point interpolation, a time window and an N exponential mode; and in each seismic channel, performing interpolation by using the obtained coherent energy spectrum values of the selected sampling points to obtain the coherent energy spectrum values of the unselected sampling points. Therefore, the calculation quantity of the coherent energy spectrums can be reduced, and the coherent energy spectrums with high resolution can be acquired.

Description

Technical field [0001] The present invention relates to geophysical prospecting technology, and more specifically, to a method that can reduce the calculation amount of coherent energy spectrum and obtain coherent energy spectrum with high resolution. Background technique [0002] After obtaining the observation system through conventional methods, geophysical prospecting requires further processing of seismic data, which generally requires superposition and migration processing procedures. When performing stacking and migration in anisotropic media, accurate stacking speed and migration speed, as well as anisotropic parameter values ​​are required. The main method to obtain these velocity and anisotropy parameter values ​​is to scan the velocity and anisotropy parameters. Starting from the smallest speed and anisotropy parameter values, and ending with the largest speed and anisotropy parameter values, scan the calculation results in sequence. The result of the scan is reflect...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
Inventor 陈三平刘鸿何光明李磊巫骏陈丹朱晨
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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