Design Method of Irregular Observation System for Seismic Exploration Based on Compressive Sensing
A technology of compressed sensing and observation system, applied in seismology, seismic data acquisition, seismic signal recording and other directions, can solve the problem of large signal error, can not completely restore the effective signal, and achieve the effect of minimizing the reconstruction signal error
Active Publication Date: 2020-06-30
CHINA PETROCHEMICAL CORP +3
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Problems solved by technology
Although these methods can be an effective method for high-efficiency seismic acquisition, they cannot completely restore the effective signal of high-density acquisition because the reconstructed signal has a larger error than the real signal.
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[0028] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.
[0029] like figure 1 as shown, figure 1 It is a flow chart of the method for designing an irregular observation system for seismic exploration based on compressed sensing in the present invention.
[0030] Step 101: Determine the scope of the work area, determine the layout range of shot points and receiving points, and determine the number of shot points and receiving points required for compressed sensing collection according to the observation system of conventional collection and efficient collection. Since the shot points designed in the present invention are completely distributed and the receiving points are distributed in the receiving lines, it is necessary to determine the number of receiving lines.
[0031] Step 102: According to the layou...
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The invention provides a method for designing an irregular observation system for seismic exploration based on compressed sensing. The method for designing the irregular observation system for seismicexploration based on compressed sensing includes a step 1 of determining the range of a work area, determining a shot point range and a receiving point range, the number of required shot points, thenumber of receiving lines and the number of receiving points; a step 2 of designing the receiving lines, and optimally designing the layout positions of the receiving lines according to the range of the work area and the number of receiving lines; a step 3 of designing the receiving points, and optimally designing the layout positions of the receiving points according to the determined positions of the receiving lines; a step 4 of designing the shot points, and optimally designing the layout positions of the shot points according to the layout range of the shot points; and a step 5 of generating an irregularly optimized observation system based on compressed sensing according to the optimally designed shot point positions and receiving point positions. The method for designing the irregular observation system for seismic exploration based on compressed sensing minimizes a reconstruction signal error by optimizing the observation system, and provides accurate data for fine reservoir prediction and oil and gas exploration.
Description
technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for designing an irregular observation system for seismic exploration based on compressed sensing. Background technique [0002] At present, the sampling methods based on compressive sensing theory mainly include: 1) Poisson disk random sampling—control the sampling interval by setting some disks with a certain radius around adjacent sampling points; 2) Jittered sampling—firstly, all The sample points are uniformly segmented, and then random dithering is performed in each segment based on the center sample point to select sampling points; 3) Segmented sampling - first segment all sample points, and then randomly select one in each sub-segment As a sampling point; 4) Improved subsection sampling—while maintaining the advantages of subsection random sampling, it solves the problem of remaining sampling points. [0003] At present, the sampling methods based o...
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IPC IPC(8): G01V1/00G01V1/20G01V1/24
CPCG01V1/003G01V1/20G01V1/24
Inventor 吕公河霍守东吕尧邸志欣石太昆舒国旭张光德高正辉徐雷良单小彩黄亮
Owner CHINA PETROCHEMICAL CORP