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Determination of co in one-dimensional seepage process 2 Soluble surfactants in co 2 Apparatus and method for concentration distribution in water system

A technology of surfactant and concentration distribution, which is used in measurement devices, material separation, and analysis of materials.

Active Publication Date: 2017-05-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The patent application number CN201110191927.4 discloses a preparation method and concentration determination of a low-concentration viscoelastic surfactant solution. Some related studies have only measured the distribution coefficient and concentration distribution of the compound in water or oil, but not No core is involved in the seepage process and CO 2 Soluble surfactants in CO 2 / method of concentration distribution in water systems, without determination of CO during percolation 2 Soluble surfactants in CO 2 Method and device for concentration distribution in water system

Method used

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  • Determination of co in one-dimensional seepage process <sub>2</sub> Soluble surfactants in co <sub>2</sub> Apparatus and method for concentration distribution in water system
  • Determination of co in one-dimensional seepage process <sub>2</sub> Soluble surfactants in co <sub>2</sub> Apparatus and method for concentration distribution in water system

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Embodiment 1

[0035] A method for measuring CO in one-dimensional seepage process 2 Soluble surfactants in CO 2 / device for concentration distribution in water system, structure such as figure 1 , 2 As shown, it includes a one-dimensional core model 1 filled with quartz sand and is a transverse cylinder; the one-dimensional core model 1 comprises a transverse cylindrical shell 9-4, and a transverse cylindrical inner chamber is arranged in the shell 9-4, and the inner cavity The cavity is filled with quartz sand with a particle size of 50 mesh and a permeability of 2000 mD. The inlet and outlet ends of the shell 9-4 are respectively provided with threaded joints. The length of the cylindrical inner cavity is 50 cm and the diameter is 5 cm.

[0036] The inlet of the one-dimensional core model 1 is connected to a phase-parallel emulsion generator and a crude oil injection device through a six-way valve 7, and the inlet of the emulsion generator is connected to a phase-parallel CO 2 Gas inj...

Embodiment 2

[0039] Determination of CO in one-dimensional seepage process as described in Example 1 2 Soluble surfactants in CO 2 / A device for concentration distribution in a water system, the difference being:

[0040] The one-dimensional core model 1 includes a transverse cylindrical shell 9-4, and a transverse cylindrical inner cavity is arranged inside the shell 9-4. The inner cavity is filled with quartz sand with a particle size between 200 mesh and a permeability of 500 md. The inlet end and the outlet end of 9-4 are respectively provided with threaded joints, and the length of the cylindrical inner cavity is 100 cm, and the diameter is 10 cm. A total of 9 sampling ports 8 are opened, and the distance between the sampling ports 8 is 10 cm.

Embodiment 3

[0042] Determination of CO in one-dimensional seepage process as described in Example 1 2 Soluble surfactants in CO 2 / A device for concentration distribution in a water system, the difference being:

[0043] The one-dimensional core model 1 includes a lateral cylindrical shell 9-4. A transverse cylindrical inner cavity is arranged inside the outer shell 9-4. The inner cavity is filled with quartz sand with a particle size between 100 mesh and a permeability of 1000 md. The two ends of the inlet and outlet of 9-4 are respectively provided with threaded joints, and the length of the cylindrical inner cavity is 80cm, and the diameter is 80cm. A total of 9 sampling ports 8 are opened, and the distance between the sampling ports 8 is 6 cm.

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Abstract

The invention relates to a device for measuring concentration distribution of a CO2 soluble surfactant in a CO2 / water system in the one-dimension seepage process. The device comprises a one-dimension core model, wherein the inlet end of the one-dimension core model is connected with an emulsion generator and a crude oil injection device which are connected in parallel; the inlet end of the emulsion generator is connected with a CO2 gas injection device and a surfactant injection device which are connected in parallel; the outlet end of the one-dimension core model is connected with a gas source bottle and a liquid containing bottle which are connected in parallel; multiple sampling holes at equal intervals are formed in the top of the one-dimension core model; and each sampling hole is connected with a sampler by virtue of a pipeline with a valve. When sampling is performed at different parts of the model, the water phase and CO2 phase are separated in the sampler, the CO2 phase sample is dissolved in water, and the concentration of the surfactant is detected by using high performance liquid chromatography, so that the solubility of the surfactant in the supercritical CO2 phase and water phase is determined. The device disclosed by the invention is simple in structure and high in accuracy rate.

Description

technical field [0001] The invention relates to a device and method for measuring the concentration distribution of a CO2 soluble surfactant in a CO2 / water system in a one-dimensional seepage process, and belongs 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 oil and water, CO 2 Flooding is low cost, effective, recyclable and reusable, non-toxic and environmentally friendly. When it is dissolved in a large amount of crude oil, it can expand the volume of crude oil and reduce its viscosity. It can also reduce the interfacial tension between oil and water and enhance oil recovery. . It has good application prospects in low permeability reservoirs, high water cut reservoirs and deep reservoirs, and CO injection 2 Gas can reduce CO in the air 2 amount, reduce the greenhouse effect, and is conducive to environmental protection. But under reservoir conditions, CO 2 Generally i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
Inventor 李兆敏刘己全李宾飞叶金桥张昀王壮壮
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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