Evaluation apparatus and method of supercritical CO2 emulsion stability

A technology for emulsion stability and evaluation device, which is applied in measurement devices, material analysis by optical means, instruments, etc., can solve the problems of no method and device for measuring the stability of supercritical carbon dioxide emulsion, and achieves low cost and satisfactory results. The effect of developing requirements and solving storage problems

Active Publication Date: 2014-07-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, few scholars have studied the stability of supercritical carbon dioxide emulsions under high temperature and high pressure. There is no method and device for measuring the st

Method used

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  • Evaluation apparatus and method of supercritical CO2 emulsion stability
  • Evaluation apparatus and method of supercritical CO2 emulsion stability
  • Evaluation apparatus and method of supercritical CO2 emulsion stability

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Embodiment 1

[0037] A supercritical CO 2 Emulsion stability evaluation device, the structure is as follows figure 1 Shown, comprise reactor 9, be provided with agitator 10 at the bottom of reactor 9, described agitator is high-voltage electromagnetic coupling high-speed agitator, described reactor 9 is the reactor with visible window, the A drain line is connected to the bottom, and a temperature sensor and a heater are provided on the outer wall of the reactor. The signal output end of the temperature sensor is connected to the signal input end of the temperature controller, and the control output end of the temperature controller is connected to the heater. The temperature The controller is connected with the power supply, and the temperature controller and the controller for controlling the rotation speed of the stirrer are located at the bottom of the reaction kettle. The top of the reaction kettle 9 is connected with a carbon dioxide branch and a sample input branch by a pipeline, an...

Embodiment 2

[0043] A kind of utilizing device described in embodiment 1 to supercritical CO 2 The measuring method of emulsion stability comprises steps as follows:

[0044] (1) Open the valve on the connecting pipeline between the advection pump and the six-way valve, turn on the advection pump, and pump distilled water into the entire device system through the advection pump for cleaning for 20 minutes. The pumping speed of distilled water is 5ml / min, and pass through the bottom of the reactor Drain the distilled water from the drain line.

[0045] (2) Turn on the advection pump, open the valve between the advection pump and the second intermediate container, and pump di-(2-ethylhexyl)-sulfonic acid with a mass concentration of 0.6%wt into the reactor at a flow rate of 5ml / min Sodium succinate (AOT) solution 50ml, at this time, the temperature and pressure in the reaction kettle are normal temperature and pressure.

[0046] (3) Adjust the temperature in the reactor through the tempera...

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Abstract

The invention relates to an evaluation apparatus and a method of supercritical CO2 emulsion stability. The evaluation apparatus comprises a reaction vessel; a stirrer is arranged in the reaction vessel and on the bottom of the reaction vessel; the top of the reaction vessel is connected with a carbon dioxide branch and a sample input branch via pipelines; the carbon dioxide branch is provided with a first intermediate container, a gas booster pump, and a CO2 gas storage tank; the sample input branch is provided with a water container, a constant-flux pump, and a second intermediate container; the bottom of the reaction vessel is provided with a sample outlet; the sample outlet is connected with a sampler via pipelines; a microscopic camera is arranged right above and oppositely to the sampler; and the microscopic camera is connected with a computer via data lines. The evaluation apparatus is capable of preparing supercritical CO2 emulsion under high-temperature and high-pressure conditions, can be used for direct observation and measuring on CO2 emulsion stability under supercritical states, and is capable of realizing evaluation on stability of supercritical CO2 emulsion.

Description

technical field [0001] The invention relates to a method for measuring supercritical CO 2 An evaluation device for emulsion stability and a measuring method thereof belong to the technical field of oil and gas field development engineering. technical background [0002] Due to CO 2 It is a gas with high solubility in both oil and water. When it dissolves in a large amount in crude oil, it can expand the volume of crude oil, decrease its viscosity, and reduce the interfacial tension between oil and water. Compared with other oil displacement technologies, carbon dioxide flooding has the advantages of wide application range, low cost of oil displacement, and significant improvement of oil recovery. This technology can not only meet the needs of oil field development, but also solve the problem of carbon dioxide sequestration and protect the atmospheric environment. Under reservoir conditions, CO 2 Generally in a supercritical state (temperature and pressure above 31.1°C an...

Claims

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Application Information

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IPC IPC(8): G01N21/84
Inventor 李松岩李兆敏刘己全李宾飞王鹏
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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