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High-temperature and high-pressure interfacial tension measurement device and method

A technology of interfacial tension, high temperature and high pressure, applied in the direction of surface tension analysis

Inactive Publication Date: 2014-11-19
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a new high-temperature and high-pressure interfacial tension measuring device and testing method, which solves the related defects of measuring interfacial tension under current high-temperature and high-pressure conditions

Method used

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  • High-temperature and high-pressure interfacial tension measurement device and method

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Embodiment Construction

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail in combination with technical solutions and accompanying drawings.

[0027] Such as figure 1 , 2 , 3(a), and 3(b): the high-temperature and high-pressure interfacial tension measuring device includes a gas injection device, a liquid injection device, a high-temperature and high-pressure visible kettle, a safety explosion-proof device, and an image acquisition and processing device:

[0028] The gas injection device comprises a buffer bottle (11) and a gas injection pump (17), and the gas injection pump (17) is placed in the cold trap (16), and the cold trap (16) is connected with the low-temperature constant temperature bath (19), and the low-temperature constant temperature bath ( 19) Provide low-temperature circulating water; the gas injection pump (17) is divide...

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Abstract

The invention provides a high-temperature and high-pressure interfacial tension measurement device and method. The measurement device is provided with a buffer bottle and a gas injection pump between a steel cylinder and a visual kettle; a sample injection pump is connected with a pump flow control box and a pump temperature measurement probe; the gas injection pump is arranged in a cold trap which is connected with a low-temperature thermostatic bath; the gas injection pump is provided with an outer cavity and an inner cavity; a window of the visual kettle is a sapphire window; a temperature measurement probe and a pressure sensor in the kettle are respectively arranged on the two sides of a suspension dropper; a gas-liquid inlet and outlet pipe is vertically opposite to the suspension dropper at the bottom of the visual kettle. After the device and the method are adopted, the problems that pressurization is difficult when a pendant-drop method is used for interfacial tension measurement under the conditions of high temperature and high pressure, liquid drops easily fall off under mixed-phase condition, and the window needs high pressure resistance, high temperature resistance and high light transmittance can be solved; an experimental facility is safe and explosion-proof; the device and the method for interfacial tension measurement within the high experimental temperature range (over 100 DEG C) and under the high pressure (over 10 MPa) can be provided.

Description

technical field [0001] The invention belongs to the technical field of measuring high-pressure physical property interfacial tension, and relates to the measurement of oil-gas (CO 2 , N 2 , gaseous hydrocarbons, etc.) interfacial tension measurement device and test method. Background technique [0002] CO 2 Oil displacement (CO 2 -EOR) refers to the CO 2 The gas is injected into the oil reservoir to reduce the viscosity of crude oil to increase the oil recovery rate of crude oil. CO 2 Oil flooding technology can bury CO 2 while enhancing oil recovery. CO 2 The mechanism of -EOR can be divided into CO 2 Miscible flooding and CO 2 immiscible drive. CO 2 During the oil displacement process, when the oil-gas interfacial tension is zero, the pressure to achieve miscibility is the minimum miscibility pressure-MMP (Minimum Miscibility Pressure), so the interfacial tension and MMP are used to judge CO 2 It is an important parameter of oil displacement technology to achi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/02
Inventor 商巧燕夏淑倩董志峰殷图源
Owner TIANJIN UNIV
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