Multi-scale seismic data joint imaging method based on fluctuation theory

Abstract

A multi-scale seismic data joint imaging method based on fluctuation theory comprises the steps of: respectively measuring ground seismic data, cross-well seismic data and/or vertical seismic profile data within a block, namely at least two types of seismic data in a VSP method by adopting wave field direct downward continuation method so as to obtain pre-stack depth migration data; respectively conducting normalization treatment on the obtained pre-stack depth migration data of at least two types of seismic data, namely the ground seismic data, the crow-well seismic data and/or the vertical seismic profile data; and superposing the pre-stack depth migration data after normalization treatment to obtain a multi-scale data joint imaging result in the block. The method can combines the advantages of the ground seismic data, the cross-well seismic data and the vertical seismic profile data, is adapt to horizontal change of a velocity field better and maintains a certain degree of dynamic characteristics.

Description

technical field [0001] The invention relates to the field of seismic exploration, in particular to a multi-scale seismic data joint imaging method based on wave theory. Background technique [0002] Seismic exploration is an important means of surveying oil and gas resources before drilling. Seismic exploration is also widely used in coal field and engineering geological exploration, regional geological research and crustal research. Currently, there are various seismic prospecting methods, such as surface seismic methods, cross-well seismic methods and vertical seismic profiling (VSP, Vertical Seismic Profiling) measurement methods. [0003] But there are at least the following problems in the above-mentioned prior art: [0004] Due to the low frequency of seismic waves in surface seismic data, the imaging resolution is limited; [0005] Although VSP and cross-well seismic data have high resolution, they can only provide local imaging information between two wells; [0...

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Problems solved by technology

[0004] Due to the low frequency of seismic waves in surface seismic data, the imaging resolution is limited;

[0005] Although VSP and cross-well seismic data have high resolution, they can only provide local imaging information between two wells;

[0006] At present, there is no uniform and effective method for joint imaging of multi-scale data of surface seismic data, cross-well seismic data and VSP data

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