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Method for distinguishing aquo-complex phase from water phase through CT scanning

A technology of CT scanning and hydrate, which is used in material analysis using radiation, material analysis using wave/particle radiation, and material analysis, etc. It can solve the problem of indistinguishable, fuzzy boundaries between hydrate and water, and inability to hydrate Distinguish between two phases with water, etc., to achieve a good effect of distinguishing

Active Publication Date: 2016-08-17
DALIAN UNIV OF TECH
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Problems solved by technology

However, since the densities of hydrate and water are very close, when using CT scanning visualization technology to obtain the formation process of hydrate, the boundary between hydrate and water is blurred, and the two phases cannot be accurately distinguished in the grayscale image.
The emergence of contrast agents can change the imaging effect of each phase, but the optimal resolution concentration of different types of contrast agents is controversial
Therefore, it is still impossible to distinguish the two phases of hydrate and water in the process of using visualization technology to scan hydrates.

Method used

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  • Method for distinguishing aquo-complex phase from water phase through CT scanning
  • Method for distinguishing aquo-complex phase from water phase through CT scanning
  • Method for distinguishing aquo-complex phase from water phase through CT scanning

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Embodiment 1

[0030] (1) Obtain the gray distribution in the container before hydrate formation

[0031] Taking the two-phase resolution of tetrahydrofuran hydrate and aqueous solution as an example, first fill glass sand into a test tube as a porous medium, then prepare tetrahydrofuran aqueous solution according to the mass ratio of tetrahydrofuran and deionized water as 3:2, and add potassium iodide at a mass fraction of 6 %, pour the tetrahydrofuran aqueous solution into the test tube again to obtain the state before the formation of tetrahydrofuran hydrate. The gray scale distribution before the formation of THF hydrate was obtained by CT scanning, as shown in Figure 1(a);

[0032] (2) Obtain the gray distribution of the hydrate in the container

[0033] The test tube containing the tetrahydrofuran aqueous solution is placed in a water bath, the temperature is set at -6°C, and the pressure is normal pressure to carry out the formation process of tetrahydrofuran hydrate. After standing...

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Abstract

The invention disclosesa method for distinguishing an aquo-complex phase from a water phase through CT scanning, and belongs to the technical field of chemical engineering and petrol engineering. The method for distinguishing the aquo-complex phase from the water phase with the CT technology includes the steps that gray level distribution generated before an aquo-complex is generated in a container is obtained with the imaging technology, gray level distribution generated after the aquo-complex is generated in the container is obtained, the area of the generated aquo-complex is obtained, and therefore the aquo-complex phase and the water phase are distinguished; finally, the decomposition process of the aquo-complex is quantitatively obtained through a formula. By means of the method, the area of the generated aquo-complex can be accurately determined, the position of the aquo-complex and the position of water are visibly determined accordingly, and the distinguishing effect is quite good accordingly; in addition, changes of the saturation degree in the decomposition process of the aquo-complex are calculated, and therefore the decomposition process of the aquo-complex is quantitatively analyzed.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering and petroleum engineering, and relates to a method for realizing two-phase separation of hydrate and water by using CT technology. Background technique [0002] Hydrate is a new type of energy with commercial development prospects, and the effective exploitation of hydrate is an important research topic. However, since the densities of hydrate and water are very close, when the visualization technology of CT scanning is used to obtain the formation process of hydrate, the boundary between hydrate and water is blurred, and the two phases cannot be accurately distinguished in the grayscale image. The appearance of contrast agents can change the imaging effect of each phase, but the optimal resolution concentration of different types of contrast agents is controversial. Therefore, in the process of using the visualization technology to scan hydrates through CT, it is still impossible t...

Claims

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Application Information

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IPC IPC(8): G01N23/04G06T7/40
CPCG01N23/046G06T2207/10081
Inventor 赵越超宋永臣吴迪杨明军蒋兰兰陈俊霖
Owner DALIAN UNIV OF TECH
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