Phase control based nonparametric and anisotropic variogram construction method

A variogram and anisotropic technology, applied in the field of geostatistics, can solve problems such as random regionalization variable changes, achieve good response, avoid errors, and improve accuracy

Active Publication Date: 2017-02-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0014] nugget value c 0 = γ(0), theoretically the value of the variogram at the origin should be zero, but due to measurement errors and microscopic variability, large changes appear between random regionalized variables within a small distance

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  • Phase control based nonparametric and anisotropic variogram construction method
  • Phase control based nonparametric and anisotropic variogram construction method
  • Phase control based nonparametric and anisotropic variogram construction method

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Embodiment Construction

[0058] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0059] Such as figure 1 Shown is the scheme flow chart of the present invention, the technical scheme of the present invention is: a kind of construction method based on phase-controlled non-parametric anisotropic variogram, comprising:

[0060] S1. Sedimentary facies division in the work area, use indicator simulation to divide the sedimentary facies in the work area; indicator simulation is an effective method to divide the sedimentary facies in the work area. Before performing the simulation, the application needs to carry out instruction transformation, that is, the process of discretizing the continuously determined original data into a Boolean quantity 0 or 1 according to a series of threshold values. Let {Z(x α ), α=1,…,N} is a set of ob...

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Abstract

The invention discloses a phase control based nonparametric and anisotropic variogram construction method. According to the method disclosed by the invention, different anisotropic variograms are fitted based on different sedimentary facies of the strata, and the construction and solving of the exponential variogram are realized. Through reasonable phase modeling, the method has the following advantages: compared with the conventional variogram construction method, the variogram fitted by the method disclosed by the invention is closer to the real geological condition, so that the error generated in the following random simulation work due to unreasonable construction of the variogram is effectively avoided; the invention establishes an inversion data based dot pair random selection method, and by randomly selecting a dot pair at each angle interval as parameter input during variogram construction, anisotropic features of the variogram can be better reflected; and the invention proposes an ant colony algorithm based variogram parameter fitting method, and by conversion of the problem, the accuracy of the variogram parameter fitting can be improved, so as to provide technical support for the following work.

Description

technical field [0001] The invention relates to the field of geostatistics, in particular to a method for constructing a variation function. Background technique [0002] The main tool for stochastic modeling is geostatistics. Geostatistics is a statistical method that uses variograms to count the spatial relationship between sampled data, and then uses this statistical rule to simulate the value of random variables at unsampled locations. On the basis of studying the regularity of spatial distribution structure characteristics of regionalized variables, geostatistics selects various appropriate Kriging methods to achieve more accurate estimation or conditional simulation of regionalized variables. It generally includes three basic components: correlation analysis of spatial functions, Kriging estimation and conditional simulation. Spatial function correlation analysis is the analysis of variogram function and covariance function, including their definition and estimated va...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 费高雷李阳胡光岷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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