A discontinuity detection method for seismic data based on high-dimensional wavelet transform

A technology of seismic data and wavelet transform, applied in the direction of seismic signal processing, etc., can solve the problems of poor spatial localization, inability to use large-scale seismic data processing, and inability to make full use of the spatial correlation of 3D seismic data, etc., to achieve less calculation Effect
CN102298155AActive Publication Date: 2011-12-28CHINA NAT OFFSHORE OIL CORP +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA NAT OFFSHORE OIL CORP
Publication Date
2011-12-28

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Abstract

The invention relates to a high-dimensional wavelet transform-based method for discontinuity detection of seismic data. The method comprises the following steps: (1), collecting seismic data and carrying out pretreatment to obtain a three-dimensional seismic data volume; (2), carrying out Hilbert transform on each channel of the three-dimensional seismic data volume so as to obtain a three-dimensional phase cosine data volume; (3), carrying out partitioning on the three-dimensional phase cosine data volume and selecting searching scopes of scale, inclination and azimuth according to discontinuous scales and geographical objects; (4), carrying out three-dimensional continuous wavelet transform on each subblock of the three-dimensional phase cosine data volume; (5), giving discontinuity tolerances of the seismic data according to a three-dimensional continuous wavelet transform coefficient modulus of each the subblock of the three-dimensional phase cosine data volume so as to obtain a partitioning discontinuous data volume; (6), carrying out splicing on the generated partitioning discontinuous data volume to obtain a discontinuous data volume of the whole seismic data. According to the method provided in the invention, computation quantity is small and multiscale detection can be carried out on discontinuity of seismic data; therefore, the method can widely applied to the detection process of the seismic data.
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Description

technical field

[0001] The invention relates to a method for detecting seismic data in oil and gas exploration, in particular to a method for detecting discontinuity of seismic data based on high-dimensional wavelet transform. Background technique

[0002] With the deepening and development of seismic exploration technology, oil and gas exploration has changed from conventional structural oil and gas reservoir exploration to subtle oil and gas reservoir exploration. The use of seismic data to detect formation dips, underground faults, fractures, lithological changes, and the edges of geological bodies is of great significance to the exploration of subtle oil and gas reservoirs.

[0003] At present, the industry usually adopts 3D seismic prospecting technology, which generates a huge amount of data, even for post-stack data, the data amount is generally tens of GB (gigabytes). Therefore, when dealing with such a huge amount of data, the efficiency and speed of the technology...

Claims

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