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A Method for Classifying Hydrate Occurrence Forms Based on Pore Network Model

A pore network model and hydrate technology, applied in the direction of chemical property prediction, etc., can solve the problems of no data, inaccurate hydrate classification, etc., and achieve the effect of accurate judgment and classification

Active Publication Date: 2022-04-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0005] In view of the above-mentioned problems existing in the prior art, the technical problem to be solved by the present invention is: the division of each form of hydrate is inaccurate, and there is no specific data as a standard

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  • A Method for Classifying Hydrate Occurrence Forms Based on Pore Network Model
  • A Method for Classifying Hydrate Occurrence Forms Based on Pore Network Model
  • A Method for Classifying Hydrate Occurrence Forms Based on Pore Network Model

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Embodiment Construction

[0040] The present invention will be described in further detail below.

[0041] A hydrate occurrence form classification method based on a pore network model, comprising the following steps:

[0042] S10; establishment of division criteria;

[0043] S11; according to figure 1 The concept of occurrence of the three hydrate occurrence forms shown in porous media, constructing a hydrate two-dimensional conceptual model set K={K n|K 1 , K 2 , K 3},in,

[0044] is a 2D conceptual model set of pore-filling hydrates, is a two-dimensional conceptual model of pore-filling gas hydrate with a saturation of m, with K 1 The saturation of any element in is not equal;

[0045] is a two-dimensional conceptual model set of cemented hydrates, is the two-dimensional conceptual model of cemented hydrate with saturation o, with K 2 The saturation of any element in is not equal;

[0046] is a two-dimensional conceptual model set of film-coated hydrates, is the two-dimensio...

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Abstract

The invention relates to the field of hydrate form division, in particular to a hydrate occurrence form division method based on a pore network model. In the present invention, the hydrate occurrence form classification standard is made by counting the hydrate shape factors and coordination numbers of the three occurrence forms of hydrate, and the hydrate-containing cores that need to be divided are scanned by CT to establish the hydrate-containing classification standard. Digital cores, after judging the relationship between hydrates and core pores, extract the shape factors and coordination numbers of the corresponding hydrates from the digital cores containing hydrates and compare them with the hydrate occurrence form classification standard to determine the occurrence of hydrates. form. In the present invention, the classification standard of hydrate is specified in the form of numerical value. Compared with the existing method, the judgment and classification of the occurrence form of hydrate is more accurate and specific, which facilitates the subsequent research on the influence of hydrate on the flow characteristics of porous media. .

Description

technical field [0001] The invention relates to the field of hydrate form division, in particular to a hydrate occurrence form division method based on a pore network model. Background technique [0002] Gas hydrate is an ice-like crystalline compound that is widely distributed in areas such as continental permafrost, polar continental shelves, and marine sediments on continental shelves. Natural gas hydrate only produces carbon dioxide and water after combustion, which is a clean energy with development prospects. In the past three decades, global energy consumption has been increasing. Hydrate, as a new type of clean energy, plays an important role in sustainable development. . According to documented reports, the content of natural gas hydrate is extremely high, and the carbon content in it is about twice the sum of the currently known carbon content. According to research, 1m 3 Gas hydrate can release about 0.81m 3 of water and 164m 3 of natural gas. [0003] The m...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16C20/30
CPCG16C20/30
Inventor 孙致学刘垒刘乐乐刘昌岭安森友孙治雷
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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