Axis point and maximum inscribed ball combined pore network model construction method

A technology of pore network model and construction method, which is applied in the field of pore network model construction combining the central axis point and the largest inscribed sphere

Pending Publication Date: 2022-01-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

The pore network model constructed by this algorithm can effectively identify pores accurately, but the throat length generated by it is longer than the actual throat length, so it also has certain limitations

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  • Axis point and maximum inscribed ball combined pore network model construction method
  • Axis point and maximum inscribed ball combined pore network model construction method
  • Axis point and maximum inscribed ball combined pore network model construction method

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[0033] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0034] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprises" and or "comprises" are used in this specification, it means that there are Features, steps, operations, means, components, and or combinations thereof.

[0035] The present invention proposes a pore network model construction method combining central axis points ...

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Abstract

The invention discloses a pore network model construction method combining a central axis point and a maximum internally tangent ball. The pore network model construction method comprises the following steps: 1, constructing a core pore space surface model by adopting an MC algorithm based on a core CT scanning binarization image; 2, extracting a middle axis point of the pore space surface model by adopting an LKC algorithm; 3, extracting a maximum inscribed sphere of a pore space by adopting a PowerCrust algorithm; 4, extracting a middle axis inscribed ball by combining the middle axis point and the maximum inscribed ball; and 5, identifying a master ball, a slave ball and a common slave ball in the middle axis internally tangent balls to define pores and throats, and finally completing construction of a pore network model.

Description

technical field [0001] The disclosure belongs to the technical field of digital rock core modeling, and in particular relates to a method for constructing a pore network model combining a central axis point and a maximum inscribed sphere. Background technique [0002] With the rapid development of social economy, human demand for oil and natural gas is increasing day by day. In order to improve the recovery of oil and natural gas in oil and gas reservoirs, in addition to theoretical research and technology development at the macro scale, research at the micro scale is also required. , go deep into its main storage space—core pore space. Therefore, it is very necessary to study a geometric model construction method that can reflect the topological characteristics of digital core pore space and simplify pores and throats by spheres and cylinders. [0003] The existing pore network models can be divided into regular topological pore network models and real topological pore netw...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 牛文杰余志燕赵元坤宋新猛刘雨巩愉杨珊珊
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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