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A Density-based Seismic Facies Extraction Method Based on Spatial Clustering for Noisy Applications

A technology that applies space and extraction methods, applied in the field of geophysical exploration seismic phase analysis, can solve problems such as unsatisfactory waveform clustering, inability to effectively identify noise points, and inability to guarantee the accuracy of cluster analysis, so as to improve accuracy and effect Effect

Active Publication Date: 2021-09-17
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 effectively identified, and waveform clusters distributed in arbitrary shapes in space cannot be satisfied, so the accuracy of cluster analysis cannot be guaranteed

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  • A Density-based Seismic Facies Extraction Method Based on Spatial Clustering for Noisy Applications
  • A Density-based Seismic Facies Extraction Method Based on Spatial Clustering for Noisy Applications
  • A Density-based Seismic Facies Extraction Method Based on Spatial Clustering for Noisy Applications

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Embodiment Construction

[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 seismic phase extraction method based on density-based noise-containing application space clustering, comprising the following steps: S1, processing actual seismic data, eliminating noise in seismic signals, and improving the signal-to-noise ratio; S2, based on seismic Based on the principle of sedimentology, stratum slices are formed by uniformly dividing along the top and bottom boundaries of the target layer; S3. Based on the stratum slices, extract seismic waveform information that can express the change of the real target reservoir characteristics; S4. Standardize and normalize the acquired seismic waveform data to eliminate the impact caused by sudden changes in characteristic parameters of different attributes; S5, through the density-based noise-containing spatial clustering method, the spatial clustering analysis of the seismic waveform data of the target layer is completed, and the corresponding seismic phase diagram is formed, which improves the current situation. The precision of extracting seismic waveforms according to the time window along the layer meets the requirement that the waveform information changes with the characteristics of the reservoir, and lays a material foundation for the cluster analysis of seismic waveforms.

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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Patent Type & Authority Patents(China)
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