Multi-seismic-resource parallel motivation collecting and hybrid seismic record separating method

A technology of seismic recording and separation method, which is applied in seismology, seismic signal processing, geophysical measurement, etc., and can solve problems affecting acquisition efficiency

Inactive Publication Date: 2015-04-22
JILIN UNIV
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Problems solved by technology

This method requires the source to be excited multiple times

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  • Multi-seismic-resource parallel motivation collecting and hybrid seismic record separating method
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  • Multi-seismic-resource parallel motivation collecting and hybrid seismic record separating method

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

[0031] Taking the multi-source parallel excitation acquisition and mixed seismic record simulated by the ray tracing method as an example, the method for separating the multi-source parallel excitation acquisition and mixed seismic record based on independent scanning signals related to the present invention includes the following steps:

[0032] a. In the exploration area, design shot points and observation systems according to the conventional single-source excitation acquisition method. Among them, the number of shot points is set to 12, and the corresponding shot point numbers are 1 to 12; geophones are arranged for the receiving arrangement of all shot points, and a total of 48 geophones are arranged with a channel spacing of 4m; the seismograph uses pulse source mode to collect , the sampling rate is 1000Hz, and the uncorrelated seismic data of vib...

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Abstract

The invention relates to a multi-seismic resource parallel motivation collecting and hybrid seismic record separating method. All measuring line shot points in an exploration area are divided into multiple corresponding sets, different scan signals are adopted by different seismic sources, motivation signals of all seismic sources are designed based on a pseudo-random method, wave detectors cover the receiving arrays corresponding to all the shot points, the wave detectors are distributed in a one-off mode, and roller paths are not needed. In the construction process, a seismograph continuously records the motivation signals to generate hybrid seismic records, after collection is completed, the hybrid seismic records of all the shot points are cut out according to the motivation times of all the shot points, and the seismic source scan signals adopted by all the shot points are used as reference signals for cross-correlation detection, namely the seismic records of each single seismic source of each shot point can be separated. Compared with an existing single-seismic-source motivation collecting method, the seismic exploration efficiency is substantially improved, n seismic sources are adopted to work in parallel, the actual construction time is 1/n of the time of the existing single-seismic-source motivation collecting method, production efficiency is improved by n times, construction cost is lowered, and a low-cost data collection method is provided.

Description

Technical field: [0001] The invention relates to a geophysical exploration data collection and data processing method, in particular to a vibrator seismic exploration collection method and data preprocessing method. Background technique: [0002] For a long time, the vibroseis generally adopts a single vibrator to excite shot points one by one, that is, the serial excitation method for seismic exploration and acquisition, and the production efficiency is low. In order to improve production efficiency, the current source technology is changing from serial working mode to parallel working mode. The multi-source parallel excitation method refers to the arrangement of multiple vibrators at different source points for parallel excitation. However, the original seismic records collected by parallel excitation of multiple seismic sources inevitably mix the seismic signals of multiple seismic sources, and the mutual interference between different seismic sources is serious, so the ...

Claims

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Application Information

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IPC IPC(8): G01V1/00G01V1/30
Inventor 姜弢杨志超陈振振徐学纯林君马瑞琪
Owner JILIN UNIV
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