Capillary fluid observation system

Abstract

The invention discloses a capillary fluid observation system. The system comprises: a heating mechanism, wherein the heating mechanism comprises a heat conducting plate and a heating element, the heatconducting plate has a first accommodating through hole for a capillary tube to pass through, and the plate surface of the heat conducting plate is provided with an observation hole communicated withthe first accommodating through hole; and a fluid injection device, wherein the fluid injection device comprises a fluid source and a pressurizing mechanism which are communicated, the pressurizing mechanism comprises an injection molding pump, a pressurizing shell and a pressurizing piston located in the pressurizing shell, the pressurizing piston has a first surface which presses a first fluidand a second surface which is opposite to the first surface, the pressurizing piston divides the internal part of the pressurizing shell into a first chamber and a second chamber, the first chamber iscommunicated with the capillary tube and a fluid source, and the second chamber is communicated with the injection molding pump. The capillary fluid observation system can realize online in-situ observation of fluids based on the micro-capillary tube.

Description

technical field [0001] The invention relates to the fields of oil and gas geology, ore deposit geology, fluid inclusions and microscopic analysis, in particular to a capillary fluid observation system. Background technique [0002] Under the conditions of high temperature and high pressure in deep and ultra-deep layers, the fluid properties of oil, gas, and water fluids will undergo major changes such as density, solubility, viscosity, and interfacial tension, and the phase state of oil, gas, and water multiphase fluids will also change with changes in temperature and pressure conditions. , at high temperature, crude oil will undergo cracking and gas generation, which will change the fluid composition, and high pressure will hinder this process. Therefore, observing fluid properties and phase changes under high temperature and high pressure has become an important demand in the geological and petroleum circles, providing important parameters and technical means for us to und...

AI Technical Summary

Problems solved by technology

The existing technology is mainly used to seal the fluid in the quartz capillary to make pure H 2 O system, pure CO 2 System, H 2 O-Nacl system and H 2 O-CO 2 However, in-situ observations of fluids with on-line temperature and pressure control directly based on microcapillary tubes are seldom carried out, and there are even rare reports on the observation of multiphase fluid flow characteristics under a fixed pressure difference between the two ends of the capillary tubes.

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