Block sparse compressed sensing-based desert seismic exploration random noise suppression method

A random noise and compressed sensing technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve problems such as non-directionality, achieve the effect of improving reconstruction accuracy, improving algorithm efficiency, and enhancing sparsity

Active Publication Date: 2018-03-20
JILIN UNIV
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However, this method largely depends on the selection of the threshold value i

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  • Block sparse compressed sensing-based desert seismic exploration random noise suppression method
  • Block sparse compressed sensing-based desert seismic exploration random noise suppression method
  • Block sparse compressed sensing-based desert seismic exploration random noise suppression method

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Embodiment Construction

[0048] Include the following steps:

[0049] (1) Acquisition of desert earthquake records:

[0050] In the desert area of ​​the Tarim Basin, the surface is mostly covered by desert, and the sand dunes on the surface are thick and undulating, and the absorption and attenuation of seismic waves are very serious. To conduct seismic exploration in the desert area of ​​the Tarim Basin, the surface structure survey is first carried out, and the water table is accurately obtained through the water table measurement. Based on the results of micro-logging and small refraction, the well depth is reasonably and accurately designed, and the dune curve database is established through the dune curve survey to solve the problem of deep well excitation design for large sand dunes. Then, combined with the actual conditions in the field, seismic excitation is carried out. , and finally, according to factors such as the thickness of the sand dunes, adjust the survey line deployment and geophone ...

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Abstract

The invention relates to a block sparse compressed sensing-based desert seismic exploration random noise suppression method and belongs to a method for eliminating the low-frequency random noise in the desert seismic exploration environment. The accurate positioning of effective signals is achieved through the research on the non-uniform property of the desert noise. The characteristic that a seismic signal structural block is sparse is fully considered by the block sparse compressed sensing algorithm, so that the purpose of random noise suppression in the desert area is achieved. According tothe invention, on the premise that the random noise in the desert area is reduced, the amplitude of effective reflection waves in seismic record can be effectively kept. The resolution of seismic data is improved. The method provides a favorable condition for the seismic data treatment of petroleum and natural gas exploration in the complex and variable desert environment.

Description

technical field [0001] The invention belongs to a random noise suppression method for desert seismic exploration, in particular to a random noise suppression method for desert seismic exploration based on block sparse compressed sensing. Background technique [0002] Oil and gas resources play an important role in the development of the national economy, and seismic exploration is an important means of exploring oil and gas resources. With the needs of the development of the national economy and the improvement of the level of science and technology, the requirements for seismic exploration technology have gradually developed from enhanced effective signals to the "three high" levels of high signal-to-noise ratio, high resolution, and high fidelity. In the "three high" requirements, high signal-to-noise ratio is the foundation. The desert-covered Tarim Basin, as my country's largest oil and gas reserve base, is currently the most important seismic exploration area. Seismic...

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Application Information

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IPC IPC(8): G01V1/36
CPCG01V1/364G01V2210/324
Inventor 李月邵丹张超王胜男卜一波孟宇奇
Owner JILIN UNIV
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