Device and method for measuring three-phase permeability of supercritical CO2 emulsion by steady-state flow method

A three-phase permeability and supercritical technology, which is applied in the field of devices for measuring the three-phase permeability of supercritical CO2 emulsion by steady-state flow method, can solve the problem of complex calculation, can not guarantee close to the actual value of the experiment, and does not measure the three-phase permeability. Devices and methods, etc.

Inactive Publication Date: 2015-07-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The unsteady state method is relatively complicated to measure the three-phase permeability. It can only measure the relative permeability curve higher than the saturation of the front, and the relative permeability curve in the high oil saturation period is incomplete. Difficulties exist in the measurement of three-phase permeability; using mathematical models to calculate three-phase permeability is relatively fast, but this method gives too many assumptions, the model is too idealized, and the limitations are too large to ensure that it is reasonably close to the real value of the experiment
Currently only CO 2 gas drive two-phase permeability method, and does not measure CO 2 Apparatus and method for oil, gas and water three-phase permeability of emulsion in core seepage

Method used

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  • Device and method for measuring three-phase permeability of supercritical CO2 emulsion by steady-state flow method
  • Device and method for measuring three-phase permeability of supercritical CO2 emulsion by steady-state flow method
  • Device and method for measuring three-phase permeability of supercritical CO2 emulsion by steady-state flow method

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Embodiment 1

[0036] A steady-state flow method for the determination of supercritical CO 2 The device of emulsion three-phase permeability, the structure is as figure 1 As shown, it includes a transverse cylindrical one-dimensional core model 7 and a CT scanner 9 for scanning the core of the one-dimensional core model 7, and the one-dimensional core model 7 is filled with quartz sandstone cores. Specifically, the one-dimensional core model 7 includes a cylindrical shell, and a cylindrical inner cavity is arranged inside the shell, and the inner cavity is filled with quartz sand with a particle size between 50-200 meshes, and the inlet and outlet ends of the shell are respectively set With threaded interface, the length of the cylindrical lumen is 50cm and the diameter is 5cm. The CT scanner 9 adopts GE's LIGHTSPEED 8-slice spiral CT, which can realize dual-energy simultaneous scanning (DEES), and can perform CT scanning on the core under two different energies at the same time, and obtain...

Embodiment 2

[0040] A steady-state flow method for the determination of supercritical CO 2 The device of emulsion three-phase permeability, structure is shown in embodiment 1, and difference is:

[0041] The one-dimensional core model 7 includes a cylindrical shell, which is provided with a cylindrical inner cavity, and the inner cavity is filled with quartz sand with a particle size between 50-200 mesh, and the inlet and outlet ends of the shell are respectively provided with threaded joints , the cylindrical lumen has a length of 100 cm and a diameter of 10 cm.

Embodiment 3

[0043] A steady-state flow method for the determination of supercritical CO 2 The device of emulsion three-phase permeability, structure is shown in embodiment 1, and difference is:

[0044] The one-dimensional core model 7 includes a cylindrical shell, which is provided with a cylindrical inner cavity, and the inner cavity is filled with quartz sand with a particle size between 50-200 mesh, and the inlet and outlet ends of the shell are respectively provided with threaded joints , the cylindrical lumen has a length of 80 cm and a diameter of 8 cm.

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Abstract

The invention relates to a device for measuring the three-phase permeability of supercritical CO2 emulsion by a steady-state flow method. The device comprises a one-dimensional rock core model and a computed tomography (CT) scanner, wherein an inlet end of the one-dimensional rock core model is connected an emulsion generator and a crude oil injection device which are connected with each other in parallel; an inlet end of the emulsion generator is connected with a CO2 gas injection device and a surface active agent injection device which are connected with each other in parallel; an outlet end of the one-dimensional rock core model is connected with a gas source bottle and a liquid-containing narrow-mouth bottle which are connected with each other in parallel; a gas outlet pipe of the liquid-containing narrow-mouth bottle is sequentially connected with a drying pipe and a flow meter. According to the method for measuring the three-phase permeability of the supercritical CO2 emulsion, the three-phase fluid saturation of the supercritical CO2 emulsion is accurately obtained by a CT double-energy synchronous scanning method, and the relevant data measured by the experiment is substituted into a Darcy-Weisbach formula, so that the three-phase relative permeability of the supercritical CO2 emulsion under the different degrees of saturation can be obtained; the method is also used for measuring CO2 foam flooding two-phase permeability. The device and the method are small in limitation, are capable of reasonably approaching the experimental real value, and are simple in operation and accurate in measurement.

Description

technical field [0001] The invention relates to a steady-state flow method for measuring supercritical CO 2 Apparatus and method for three-phase permeability of emulsion. 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. 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 are above 31.1°C and 7.38MPa respectively), CO 2 The density is close to the liquid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
Inventor 李兆敏刘己全张超王飞董全伟张兴鲁张昀叶金桥
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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