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Device and method for determining distribution coefficient of surface active agent in supercritical CO2 and water phases

A surfactant and distribution coefficient technology, which is applied in the field of devices for measuring the distribution coefficient of surfactants in supercritical CO2 and water two-phase, can solve the problems of inapplicable distribution coefficient and failure to measure the distribution coefficient of surfactant, and achieve The effect of small footprint, simple device structure, and accurate measurement accuracy

Active Publication Date: 2015-07-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is also not applicable to the determination of the distribution coefficient under high temperature and high pressure conditions, nor is it suitable for the determination of the distribution coefficient in gases and supercritical fluids
[0006] Conventional surfactants are generally soluble in aqueous solutions, but now domestic and foreign related supercritical CO 2 Many studies on microemulsions and emulsions have suggested that the moderate solubility of surfactants in both phases is the most beneficial for oil displacement. At present, few scholars have studied the determination of surfactants in supercritical CO. 2 There is no method for the distribution coefficient in the two phases of water and water, and there is no method that can determine the concentration of surfactants in supercritical CO under high temperature and high pressure conditions. 2 Apparatus for partition coefficients in two phases with water

Method used

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  • Device and method for determining distribution coefficient of surface active agent in supercritical CO2 and water phases
  • Device and method for determining distribution coefficient of surface active agent in supercritical CO2 and water phases
  • Device and method for determining distribution coefficient of surface active agent in supercritical CO2 and water phases

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Effect test

Embodiment 1

[0053] like figure 1 , 2 As shown, a measurement of surfactant in supercritical CO 2 The device of the distribution coefficient in the two phases of water and water comprises a reactor 1 with a stirring device and a heating device, and the reactor 1 is provided with a first feed inlet, a first feed outlet, a second feed inlet and a first feed inlet. Second outlet;

[0054] The first feed port is connected with the carbon dioxide container 2 connected with the first flow pump 3, the first discharge port is connected with the carbon dioxide absorption container 10, and the first discharge port is connected with the carbon dioxide absorption container 10 A first sampler 8 is arranged between them;

[0055] The second feed port is connected to the surfactant container 5 connected with the second flow pump 6 , and the second discharge port is connected to the second sampler 11 .

[0056] The first feed port and the first discharge port are located at the top of the reactor 1 , ...

Embodiment 2

[0069] A sampler, comprising a sampler shell 8-3, a sampler liner 8-2, a sampler feed port 8-1 and a sampler discharge port 8-5, the sampler shell 8-3 is provided with The observation window 8-4 of the sampler, the feed port 8-1 of the sampler and the discharge port 8-5 of the sampler are all communicated with the liner 8-2 of the sampler.

[0070] The sampler casing 8-3 is a cylindrical structure, the sampler liner 8-2 is a transparent structure, and the sampler observation window 8-4 is a groove-shaped structure.

Embodiment 3

[0072] A kind of utilizing device described in embodiment 1 to surfactant in supercritical CO 2 The measuring method of partition coefficient in and water two-phase comprises steps as follows:

[0073] Pump distilled water into the whole device system for cleaning for 30 minutes, the pumping speed of distilled water is 5ml / min, and discharge the distilled water after cleaning is completed;

[0074] (1) Fatty alcohol polyoxyethylene polyoxypropylene ether (C 12 E. 9 P 3 ) The aqueous surfactant solution is charged into the surfactant container 5, the second valve 7 is opened, the aqueous surfactant solution is pumped into the reactor 1 by the second advection pump 6, and the second valve 7 is closed;

[0075] (2) Regulating the temperature in the reactor 1 by the control box 14 to reach 60° C.;

[0076] (3) Put carbon dioxide into the carbon dioxide container 2, open the first valve 4, pump the carbon dioxide into the reactor 1 by the first advection pump 3, and close the f...

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Abstract

The invention relates to a device and a method for determining the distribution coefficient of a surface active agent in supercritical CO2 and water phases. The device comprises a reactor with a stirring device and a heating device, wherein the reactor is provided with a first feeding hole, a first discharging hole, a second feeding hole and a second discharging hole; the first feeding hole is connected with a carbon-dioxide container connected with a first constant-flux pump; the first discharging hole is connected with a carbon-dioxide absorbing container; a first sampler is arranged between the first discharging hole and the carbon-dioxide absorbing container; the second feeding hole is connected with a surface-active-agent container connected with a second constant-flux pump; and the second discharging hole is connected with a second sampler. The device and the method have the advantages that a high-performance liquid chromatography is used for detecting the concentration of a surface active agent, so that the distribution coefficient of the surface active agent in the supercritical CO2 and water phases is determined; and the device is simple in structure, small in occupied area and accurate in measuring accuracy.

Description

technical field [0001] The present invention relates to a kind of measuring surfactant in supercritical CO 2 The invention relates to a device and a method for a distribution coefficient in two phases of water and water, belonging to the technical field of oil and gas field development engineering. Background technique [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. Carbon dioxide flooding technology can not only meet the needs of oilfield development, but also solve the problem of carbon dioxide sequestration and protect the atmospheric environment. CO in the reservoir 2 High fluid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 李松岩李兆敏刘己全李宾飞张超王飞
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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