Seismic exploration method and device based on compressed sensing
A seismic exploration and compressed sensing technology, applied in the field of geophysical exploration, can solve the problems of massive seismic data acquisition and rising storage costs, and achieve the effects of reducing exploration cost, improving spatial resolution, and expanding exploration area.
Pending Publication Date: 2021-05-28
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0003] In recent years, in seismic exploration, in order to obtain sections with higher imaging quality, broadband, wide azimuth, and high-density seismic exploration technologies have been widely used, that is, "two widths and one height" seismic exploration technology, "two widths and one height" The problem brought about by technology is the substantial increase in the cost of acquisition and storage of massive seismic data
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[0064] The compressive sensing-based seismic exploration method provided by the present invention may specifically include: determining exploration requirements; conventional seismic exploration observation system design; sparse-constrained irregular observation system optimization design; field seismic data collection and implementation; seismic data preprocessing; The regular reconstruction of irregular seismic data based on the perception of the institute; the seven steps of seismic data imaging processing and comprehensive interpretation of seismic data; among them, the determination of exploration requirements is to determine the use of compressed sensing seismic exploration technology according to the situation of the exploration project The demand is to reduce the cost, expand the exploration area or improve the spatial resolution; the specific meaning and implementation of the above steps are as follows:
[0065] 1. Determine project requirements. According to the situ...
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The invention provides a seismic exploration method based on compressed sensing. The method comprises the steps: obtaining a project demand of a to-be-explored project, and obtaining a pre-stored corresponding observation system according to the project demand; carrying out sparsity constraint on the observation system to obtain an irregular excitation point and an irregular receiving point, and taking the excitation point and the receiving point as output data of the observation system; acquiring seismic data generated by excitation in a region corresponding to the to-be-explored project through the observation system; and performing data reconstruction on the seismic data to recover the seismic data into regular seismic data, and performing calculation according to the regular seismic data to obtain oil and gas reservoir information.
Description
technical field [0001] The invention relates to the technical field of geophysical prospecting, in particular to a seismic prospecting method and device based on compressed sensing in the process of geophysical prospecting. Background technique [0002] The Shannon / Nyquist sampling theorem points out that when the sampling frequency is greater than twice the highest frequency in the analog signal, the digital signal after sampling can restore the analog signal without distortion. Shannon / Nyquist sampling theorem, as a bridge between analog signal and digital signal, has been supporting and guiding the technological development in various fields of modern signal processing for decades. Seismic exploration technology is also a signal processing technology based on Shannon / Nyquist sampling theorem. And keep moving forward. [0003] In recent years, in seismic exploration, in order to obtain sections with higher imaging quality, broadband, wide azimuth and high-density seismic ...
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IPC IPC(8): G01V1/30G01V1/34
CPCG01V1/306G01V1/302G01V1/345G01V2210/624
Inventor 门哲宁宏晓李伟波张慕刚李翔柳兴刚
Owner BC P INC CHINA NAT PETROLEUM CORP