Seismic signal resolution enhancement method based on time-frequency domain energy adaptive weighting

A resolution-enhancing, energy-adaptive technology, applied in seismic signal processing, etc., can solve problems such as data uncertainty, reflection event narrowing, reflection waveform time reduction, etc., to suppress wavelet sidelobes and reduce Event Artifacts, Effects of Resolution Enhancement
CN104199093AActive Publication Date: 2014-12-10CHINA NAT OFFSHORE OIL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA NAT OFFSHORE OIL CORP
Publication Date
2014-12-10

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Abstract

The invention relates to a seismic signal resolution enhancement method based on time-frequency domain energy adaptive weighting. The seismic signal resolution enhancement method comprises the steps of 1) inputting a three-dimensional post-stack seismic data volume, 2) calculating time-frequency distribution of seismic signals of the three-dimensional post-stack seismic data volume channel by channel by use of generalized S transformation, and calculating the amplitude of a time-frequency spectrum, 3) calculating a reference instantaneous spectrum function for instantaneous spectrum adaptive weighting, 4) calculating an instantaneous spectrum adaptive weighting coefficient for the seismic signals by use of the reference instantaneous spectrum function, and 5) performing weighting processing on the instantaneous spectrum of the seismic signals by use of the instantaneous spectrum adaptive weighting coefficient to form a new three-dimensional post-stack seismic data volume of which the seismic resolution is enhanced, namely the seismic resolution enhanced seismic signals. The seismic signal resolution enhancement method based on time-frequency domain energy adaptive weighting can be widely applied to processing and explanation of petroleum seismic exploration data.
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Description

technical field

[0001] The invention relates to the field of petroleum seismic exploration data processing and interpretation, in particular to a seismic signal resolution enhancement method based on time-frequency domain energy self-adaptive weighting. Background technique

[0002] Using seismic signals to extract the characteristics of stratigraphic sequence changes, the position and thickness of stratigraphic reflection interfaces is an important content of oil and gas geophysical exploration. Seismic signal can be regarded as the formation of seismic wavelets filtered by the ground and added with noise. Therefore, it is a comprehensive reflection of information such as seismic wavelets, formation reflection coefficients, and noises that change simultaneously in time and space. The signal extracts information such as the formation reflection position and its lateral variation, and the thickness of the formation to provide information sources. The seismic signal spectrum ...

Claims

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