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Method for establishing network model based on serial section image

A technology of network model and establishment method, which is applied in the field of image processing and can solve problems such as large differences in the spatial distribution of pores

Inactive Publication Date: 2009-10-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, the method of obtaining the size distribution and topological information of pores and throats is mainly determined artificially. The disadvantage of this method is that it is quite different from the distribution of pores in actual rocks.

Method used

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  • Method for establishing network model based on serial section image
  • Method for establishing network model based on serial section image
  • Method for establishing network model based on serial section image

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Embodiment Construction

[0030] Below, the content and realization principle of the present invention are described in detail in conjunction with the example of building a three-dimensional network model to the Kendong 70-1 well core model in conjunction with the accompanying drawings:

[0031] 1. Acquire continuous two-dimensional slice images

[0032] The core model of Well Kendong 70-1 scans the empty core with unsaturated fluid when performing CT slice scanning. The total length of the core scan was determined to be 1.25 mm, a total of 100 slices were scanned, and the interval between every two CT slices was 0.0125 mm. Scanned slides are attached figure 1 shown.

[0033] 2. Determine the model area, perform preprocessing and image interpolation

[0034] Since the core area in the core picture scanned by CT experiment is circular, and the model for network simulation is generally a regular cuboid or cube, it is necessary to take out a group of rectangular areas with the same positioning in a ser...

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Abstract

The invention discloses a method for establishing a network model based on a serial section image, belonging to the technical field of image processing and relating to a method for establishing a network model of characteristics of porous medium (rock) containing liquid such as underground crude oil, natural gas, underground water, and the like. The method is characterized in that a group of serial bidimensional section images inside a microcosmic model are processed so as to divide rock granules and pore spaces; on the basis of reconstructing three-dimensional images for the pore spaces, size distribution and topology information of pores and throats is extracted to finally establish a network model, therefore, image information is converted into the size distribution and topology information of the pores and throats in a three-dimensional space. The invention provides the method for establishing the network model based on section images of actual porous medium, has strong pertinence and high practicability, and can be effectively used for description and digital management of actual rock pore spaces and seepage characteristic thereof.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for establishing a network model representing porous media (rocks) where fluids such as underground crude oil, natural gas, and groundwater are located. Background technique [0002] In the process of oilfield development, it is often necessary to use network simulation to study the law of oil-water movement from a microscopic point of view. The advantage of network simulation is that it can conveniently and flexibly construct the pore structure characteristics and wetting characteristics of various types of rocks, better characterize the microscopic static characteristics of porous media, and quickly and efficiently simulate the microscopic flow parameters of rocks with different static characteristics. At the same time, with the development of digital core technology, the storage of core data in the computer will be gradually realized, and the microscopic simu...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06T11/00
Inventor 侯健张顺康李振泉曹绪龙宋新旺施晓乐盛强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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