A kind of glass model sealing method

Abstract

The invention relates to a method for sealing a glass model. The method is realized by a hydraulic sealing clamp, and comprises the following steps of: connecting an inlet of an outer model with an internal thread interface of an upper clamping plate of the hydraulic sealing clamp, and butting an inlet of the glass model with a 2mm back cut; flatly arranging the glass model in the sealing clamp, arranging sealing gaskets on two sides of the inlet of the glass model, slowly injecting machine oil to lift a piston at the lower end of the sealing clamp, clamping the glass model, and closing a needle valve when the pressure is higher than 2MPa; sealing an outlet end of the glass model in the same way; arranging the glass model in the center of an outer model and fixing the glass model; and injecting confining pressure liquid into the outer model for sealing. The problems of leakage and damage of the glass model are effectively solved, and the sealing pressure is quantitatively controlled; and the preparation period of an experiment is shortened, and the efficiency of the experiment is improved.

Description

technical field [0001] The invention relates to a glass model sealing method adapted to high-pressure conditions for microscopic seepage experiments of enhanced oil recovery. Background technique [0002] Microscopic experiment is one of the effective means to study the mechanism of oil and gas seepage, most of which use glass etching model as the pore medium to observe the fluid movement and distribution state. Microscopic experiments make full use of the transparency and hardness of glass, and can clearly observe the flow inside the glass under stable high-pressure conditions. However, the low toughness of glass is the main disadvantage of the glass model, and it is easy to cause damage or even fracture of the model under the condition of uneven pressure distribution. Most of the oil and gas seepage experiments simulate the high temperature and high pressure environment of the reservoir, so how to effectively seal the glass model is very important. [0003] For microscop...

AI Technical Summary

Problems solved by technology

Since the design pressure of each experiment is not the same, the pressure of the spring or pressing plate cannot be effectively controlled, resulting in leakage or even damage to the glass model

There is also a way to use sealant. The disadvantage is that it takes a long time to wait for the sealant to cure (more than 7 days), and it is easy to break when disassembling the glass model.

These two methods seriously reduce the success rate of the experiment, not only waste time but also easily cause damage to the model

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