Density-based seismic facies extraction method of noise-containing application spatial clustering

A technology using space and extraction methods, applied in the field of seismic facies analysis in geophysical exploration, can solve problems such as the inability to meet waveform clustering, the inability to effectively identify noise points, and the inability to guarantee the accuracy of clustering analysis, so as to improve the accuracy and improve the effect. Effect

Active Publication Date: 2019-09-13
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

However, there are still some deficiencies, the number of seismic waveform clustering categories needs to be given in advance, noise points cannot be effe...

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  • Density-based seismic facies extraction method of noise-containing application spatial clustering
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  • Density-based seismic facies extraction method of noise-containing application spatial clustering

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[0064] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0065] The present invention proposes on the basis of having studied following problem:

[0066] 1. Time slicing is to slice and display the seismic data volume along a fixed seismic travel time, and the slicing direction is along the direction perpendicular to the time axis, that is, slicing is performed along or parallel to the layer obtained by tracking the seismic event axis; along the layer A slice is a slice along a reflective interface with no polarity chang...

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Abstract

The invention discloses a density-based seismic facies extraction method of noise-containing application spatial clustering. The method comprises the following steps of: S1, processing actual seismicdata, eliminating noise in the seismic signals, and improving a signal-to-noise ratio; S2, based on the seismic sedimentology principle, forming stratum slices by uniform segmentation along the top and bottom boundaries of a target layer; S3, extracting seismic waveform information capable of expressing reservoir characteristic change of a real target layer based on the stratum slices; S4, standardizing and normalizing the acquired seismic waveform data to eliminate the influence caused by mutation of different attribute characteristic parameters; and S5, completing the spatial clustering analysis of the seismic waveform data of the target layer through adoption of a density-based noise-containing application spatial clustering method, and forming a corresponding seismic phase diagram. Theprecision of extracting seismic waveforms along the conventional layer according to time windows is improved, the requirement of waveform information changing along with reservoir characteristics ismet, and a material foundation is laid for the seismic waveform clustering analysis.

Description

technical field [0001] The invention belongs to the technical field of seismic phase analysis in geophysical exploration, in particular to a seismic phase extraction method based on density-based noise-containing application space clustering. Background technique [0002] Signal processing technology is widely used in modern production and life, and plays an important role in the fields of communication, medical treatment, military industry, geological exploration and so on. Especially in the field of energy exploration, signal processing technology runs through almost the entire system. Seismic phase analysis is an important application of seismic signal processing. Seismic phase analysis is to detect underground reservoirs and rock structures according to different modes of seismic signals, and signal classification is the key technology. By dividing the signals acquired by seismic acquisition into different categories, the analysis of stratigraphic attributes and structu...

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Application Information

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IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/282G01V1/30
Inventor 刘仕友张迎朝邓勇孙万元汪锐廖键
Owner CHINA NAT OFFSHORE OIL CORP
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