Acquisition and processing method for obtaining seismic reflected waves

A technology of seismic reflection and processing methods, applied in seismic signal processing, seismology, geophysical measurement, etc., can solve the problems of excessive or insufficient seismic wave excitation and receiving tests, and improve pertinence, effectiveness, and economic efficiency sexual effect

Active Publication Date: 2017-12-29
OIL & GAS SURVEY CGS
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Problems solved by technology

[0008] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to provide a collection and processing method for seismic reflection waves, which can solve the problem of point-to-surface in the design of the observation system in the general design method,

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  • Acquisition and processing method for obtaining seismic reflected waves
  • Acquisition and processing method for obtaining seismic reflected waves
  • Acquisition and processing method for obtaining seismic reflected waves

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Embodiment Construction

[0025] like figure 1 As shown, this acquisition and processing method for obtaining seismic reflections includes the following steps:

[0026] (1) Establish a geological model of the exploration area;

[0027] (2) assigning geophysical parameters to the geological model of the exploration area;

[0028] (3) For the geological model of the exploration area endowed with geophysical parameters, the excitation wavelet is used to carry out illumination forward modeling, and the effective excitation wavelet of the corresponding model to obtain the maximum energy is determined according to the illumination intensity;

[0029] (4) Apply the excitation wavelet selected in step (3) to carry out illumination forward modeling on the exploration area geological model endowed with geophysical parameters in step (2), and use the observation array equivalent to 3-4 times the buried depth of the target layer to perform seismic wave Receive, analyze and process the lighting forward modeling d...

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Abstract

The invention relates to an acquisition and processing method for obtaining seismic reflected waves. The method includes the following steps that: (1) an exploration area geologic model is established; (2) geophysical parameters are assigned to the exploration area geologic model; (3) excitation wavelets are applied to perform illumination forward modeling, valid excitation wavelets which are corresponding to the maximum energy of the model are determined according to illumination intensity; (4) the selected excitation wavelets are adopted to perform illumination forward modeling, so that the sequence length pairs of a geologic target layer optimal imaging effect are obtained; (5) a vertical minimum resolution is calculated according to the maximum frequency of the selected excitation wavelets and the stratum minimum velocity of the geophysical parameters, and the vertical minimum resolution is adopted as a spatial sampling rate to perform sampling, so that the spatial sampling density of the geologic target layer optimal imaging effect is obtained; (6) the parameters determined in the step (3) to the step (7) are adopted as field test parameters to perform a pilot test; and (7) sensitive parameters that influence a geological target body imaging effect and the sensitive parameters of a cost factor are obtained; and (8) a technologically effective and economically feasible acquisition scheme is obtained.

Description

technical field [0001] The invention relates to the technical field of geophysical prospecting seismic data collection, in particular to a method for collecting and processing seismic reflection waves. Background technique [0002] The design of seismic data acquisition methods for seismic exploration includes what kind of seismic waves are generated, what kind of geophones are used to receive seismic waves, and what range is used to observe seismic waves. In short, it is the excitation method, detection method and observation system design of seismic waves. [0003] The general observation system design method is to collect the geophysical model parameters of the exploration area, and theoretically calculate the bin side length, arrangement length, and coverage times of the observation system. The three-dimensional also includes the receiving line distance and the attribute evaluation of different observation systems. In mature areas of seismic exploration, actual seismic ...

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Application Information

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IPC IPC(8): G01V1/20G01V1/28G01V1/30G01V1/36
CPCG01V1/20G01V1/28G01V1/30G01V1/362
Inventor 田玉昆李娟康海霞马彦彦周惠王若马勇胜张云枭郭天旭
Owner OIL & GAS SURVEY CGS
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