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Visual physical model for vertical changes of terrain induced by hydrate decomposition and method

A technology of hydrate decomposition and physical model, which is applied in the field of visual physical model and its establishment of hydrate decomposition-induced vertical changes in terrain, can solve the problems of invisible fluid migration channels, and achieve easy promotion, high degree of visualization, and cost-effective high effect

Active Publication Date: 2019-08-09
OCEAN UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a visualized physical model and method for hydrate decomposition-induced topography vertical change, which solves the problem that the physical model test of seabed sediments containing natural gas hydrate can only be completed in high pressure, low temperature and special equipment in the prior art. The problem that the fluid migration channels in the

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  • Visual physical model for vertical changes of terrain induced by hydrate decomposition and method
  • Visual physical model for vertical changes of terrain induced by hydrate decomposition and method
  • Visual physical model for vertical changes of terrain induced by hydrate decomposition and method

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preparation example Construction

[0043] A. Preparation of natural gas hydrate substitute materials

[0044] 1) Take trichlorofluoromethane, place it at -18-4°C, refrigerate it, and set it aside;

[0045] 2) Take distilled water, place them at 2-4°C, refrigerate, and set aside;

[0046] 3) adding the trichlorofluoromethane obtained in step 1) into the distilled water obtained in step 2), stirring, and mixing them uniformly to obtain a mixture;

[0047] 4) Continue stirring the mixture obtained in step 3) at -18 to 4°C for 8 to 20 minutes until solid hydrate begins to form to obtain a natural gas hydrate substitute material;

[0048] B. Preparation of transparent marine soft clay

[0049] 5) Take lithium magnesium silicate and distilled water, the weight ratio of lithium magnesium silicate to distilled water is 3.5~6.5:100, slowly add lithium magnesium silicate into distilled water, during the process of adding lithium magnesium silicate to distilled water, the distilled water is kept stirring State: continu...

Embodiment 1

[0064] A method for establishing a visualized physical model of vertical terrain changes induced by hydrate decomposition of the present invention comprises the following steps:

[0065] A. Preparation of natural gas hydrate substitute materials

[0066] 1) Take trichlorofluoromethane, place it at -18°C, refrigerate it, and set it aside;

[0067] 2) Take distilled water, place them at 2°C, refrigerate, and set aside;

[0068] 3) adding the trichlorofluoromethane obtained in step 1) into the distilled water obtained in step 2), stirring, and mixing them uniformly to obtain a mixture;

[0069] 4) Continue to stir the mixture obtained in step 3) at -18°C for 8 minutes until solid hydrates start to form to obtain natural gas hydrate substitute materials;

[0070] B. Preparation of transparent marine soft clay

[0071] 5) Take lithium magnesium silicate and distilled water, the mass ratio of lithium magnesium silicate to distilled water is 3.5:100, slowly add lithium magnesium s...

Embodiment 2

[0082] A method for establishing a visualized physical model of vertical terrain changes induced by hydrate decomposition of the present invention comprises the following steps:

[0083] A. Preparation of natural gas hydrate substitute materials

[0084] 1) Take trichlorofluoromethane, place it at 4°C, refrigerate it, and set it aside;

[0085] 2) Take distilled water, place them at 4°C, refrigerate, and set aside;

[0086] 3) adding the trichlorofluoromethane obtained in step 1) into the distilled water obtained in step 2), stirring, and mixing them uniformly to obtain a mixture;

[0087] 4) Continue to stir the mixture obtained in step 3) at 4°C for 20 minutes until solid hydrates start to form to obtain natural gas hydrate substitute materials;

[0088] B. Preparation of transparent marine soft clay

[0089] 5) Take lithium magnesium silicate and distilled water, the particle size of lithium magnesium silicate is 25nm, and the density is 1.0g / cm 3 , the refractive index...

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Abstract

The invention provides a visual physical model for vertical changes of terrain induced by hydration decomposition and a method, and belongs to the technical field of marine geology. The visual physical model comprises a transparent marine soft clay layer and a natural gas hydrate layer, wherein the natural gas hydrate layer is located in the transparent marine soft clay layer, the transparent marine soft clay layer is prepared from lithium magnesium silicate and distilled water according to the mass ratio of (3.5 to 6.5) to 100 by mixing and stirring, and the natural gas hydrate layer is prepared from trichlorofluoromethane and distilled water according to the volume ratio of (1 to 2) to (1 to 4) under normal pressure. The visual physical model is prepared under the normal pressure withouthigh pressure, the preparation method is simple, the conditions are mild, no special requirements are imposed on equipment, and the cost is low; and an internal fluid transport channel is visible, the vertical changes of the terrain can be effectively recorded, the visualization of model tests is realized, the conditions of the physical model tests are simplified, high cost performance is achieved, and popularization is facilitated.

Description

technical field [0001] The invention relates to the technical field of marine geology, in particular to a visualized physical model of vertical terrain changes induced by hydrate decomposition and a method for establishing the same. Background technique [0002] Submarine gas hydrate decomposes to produce methane gas and water, forming overpressure, which can form fluid migration channels inside the seabed, and then form seabed uplifts (such as mud volcanoes, submarine mounds, etc.) and seabed subsidence (such as Vertical changes in topography such as seabed pits, etc., can even lead to geological disasters such as submarine landslides. The physical model test is an important research method to explore the mechanism of gas hydrate decomposition to form fluid migration and seabed deformation. Carry out physical model test research on geological models containing gas hydrate layers Collect test data such as pore pressure and seabed surface deformation during the test, which c...

Claims

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Application Information

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IPC IPC(8): E21B49/00G01N1/28
CPCE21B49/001G01N1/28G01N1/286
Inventor 朱超祁单红仙贾永刚焦欣然李清平陈江欣刘柯涵程升刘炎
Owner OCEAN UNIV OF CHINA
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