IMPROVED MARKOV CHAIN MONTE CARLO TWO-DIMENSIONAL ROCK SECTION RECONSTRUCTION METHOD AND SYSTEM

Title:

IMPROVED MARKOV CHAIN MONTE CARLO TWO-DIMENSIONAL ROCK SECTION RECONSTRUCTION METHOD AND SYSTEM

Document Type and Number:

WIPO Patent Application WO/2021/238340

Kind Code:

A1

Abstract:

An improved Markov chain Monte Carlo two-dimensional rock section reconstruction method and system. The porosity of a rock section electron microscope scanning image is calculated; neighborhood systems to be used and conditional probabilities corresponding to different combinations of the neighborhood systems are determined; iterative evaluation from right to left is carried out on even-numbered rows, iterative evaluation from left to right is carried out on odd-numbered rows, the first pixel point and the last pixel point in each row are obtained via pixel points in the previous row and in the same column and by means of two vertical neighborhoods, and a reconstruction path is obtained; according to an anisotropic characteristic exhibited by a rock section image, considering that the conditional probabilities are also anisotropic, the conditional probability of a binarized image in each direction is scanned along the reconstruction path; and a reconstructed image is obtained by means of Monte Carlo calculation and assignment. In the method, a conditional probability scanning direction is matched with a reconstruction path, and a random number is selected to reconstruct an image, such that the influence and effect of all directions are equalized, thereby improving the degree of fitting of a variation function of the reconstructed image and that of an original image while anisotropy is exhibited.

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Inventors:

HE ZHILI (CN)
HOU CONG (CN)
JIN MENGQI (CN)

Application Number:

PCT/CN2021/080673

Publication Date:

December 02, 2021

Filing Date:

March 15, 2021

Export Citation:

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Assignee:

CHANGAN UNIV (CN)

International Classes:

G06T7/136; G06T11/00

Domestic Patent References:

WO2001077993A1

2001-10-18

Foreign References:

CN111784724A	2020-10-16
CN110874843A	2020-03-10
CN106355003A	2017-01-25

Other References:

ZHANG SI-QIN; WANG ZHI-MING; WANG XIAO-QIU; LI JIANG-TAO; HONG KAI: "Reconstruction of digital core based on Markov Chain-Monte Carlo method( MCMC)", JOURNAL OF XI’AN SHIYOU UNIVERSITY(NATURAL SCIENCE EDITION), vol. 30, no. 5, 30 September 2015 (2015-09-30), pages 69 - 75, XP009532113, ISSN: 1673-064X

Attorney, Agent or Firm:

BEIJING GAOWO LAW FIRM (CN)

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