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Ultrashallow 3D Seismic Reflection Exploration Method

A three-dimensional seismic and reflected wave technology, applied in seismic signal processing, seismic signal receivers, etc., can solve the problems of inability to understand the plane distribution and three-dimensional shape of the detection target, and restrict the application effect of seismic exploration methods, so as to improve the detection ability. Effect

Inactive Publication Date: 2011-12-21
ZHEJIANG UNIV
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Problems solved by technology

At present, the ultra-shallow two-dimensional seismic exploration method is usually used in engineering geological exploration. This method can give the stratification of the stratum section within 50m below the surface, but it cannot understand the plane distribution and three-dimensional shape of the detection target. Seriously restrict the application effect of seismic exploration method

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Examples

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Embodiment

[0027] Design of array slices for ultra-shallow 3D seismic acquisition:

[0028] The design of the ultra-shallow 3D seismic acquisition array refers to the design of the receiver points and shot points of the seismic acquisition. figure 1 The ultra-shallow 3D seismic acquisition array designed for , where the small squares represent the receiver points, and the small circles represent the shot points; the design parameters of the receiver points are called receiving parameters, and the design parameters of the shot points are called excitation parameters; figure 1 The receiving parameters shown include 6 detection lines parallel to each other, the distance between adjacent detection lines is 1m, and there are 24 detection points on each detection line, and the distance between adjacent detection points is 0.5m; the excitation parameters include 12 mutual detection points. Parallel shot lines, the shot line is perpendicular to the receiver line, the distance between adjacent sh...

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Abstract

The invention discloses an ultra-shallow three-dimensional seismic reflection wave exploration method. The method comprises the following steps of: designing ultra-shallow three-dimensional seismic acquisition arrangement pieces; arranging a wave detector according to the design; exciting seismic waves by hammering a seismic source; sequentially rolling the three-dimensional seismic arrangement pieces along a longitudinal direction and a horizontal direction at intervals of 4 meters to complete the acquisition of three-dimensional seismic data; performing band-pass filtering, two-dimensional frequency space filtering and stacking on the acquired seismic data, and thus obtaining an ultra-shallow three-dimensional seismic reflection wave stacked data body, wherein a plane distribution rangeand the three-dimensional configuration of an underground detection target can be displayed according to the ultra-shallow three-dimensional seismic reflection wave data body. By the method, the problem of three-dimensional exploration of the ultra-shallow detection target in the field of engineering geological investigation is solved, the plane distribution condition and the three-dimensional configuration of the detection target can be clearly seen according to exploration results, and the detection capability of seismic exploration in the field of engineering investigation is improved.

Description

technical field [0001] The invention relates to the field of seismic exploration, in particular to an ultra-shallow three-dimensional seismic reflection wave exploration method. Background technique [0002] Ultra-shallow seismic prospecting is an effective method for engineering geological prospecting. It can detect the geological structure within 50m below the surface and provide necessary basic geological data for construction engineering and urban engineering design. It is indispensable for engineering geological prospecting. technical means. At present, the ultra-shallow two-dimensional seismic exploration method is usually used in engineering geological exploration. This method can give the stratification of the stratum section within 50m below the surface, but it cannot understand the plane distribution and three-dimensional shape of the detection target. Seriously restrict the application effect of seismic exploration method. Contents of the invention [0003] Th...

Claims

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Application Information

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IPC IPC(8): G01V1/20G01V1/28
Inventor 石战结田钢
Owner ZHEJIANG UNIV
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