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Device for evaluating foaming property of air-soluble surface active agent and application of device

一种表面活性剂、气溶性的技术，应用在评价气溶性表面活性剂起泡性能的装置领域，能够解决可注性差、二氧化碳泡沫不稳定等问题

Active Publication Date: 2014-08-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the poor injectability of water and foam fluid in low-permeability reservoirs, and the instability of conventional carbon dioxide foam, a method is proposed to make full use of the characteristics of supercritical carbon dioxide as a good solvent, using an aerosol surfactant to carry and inject it with carbon dioxide as a carrier. In the formation, supercritical carbon dioxide foam is generated to control the flow of carbon dioxide

Method used

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  • Device for evaluating foaming property of air-soluble surface active agent and application of device
  • Device for evaluating foaming property of air-soluble surface active agent and application of device
  • Device for evaluating foaming property of air-soluble surface active agent and application of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A device for evaluating the foaming performance of an air-soluble surfactant, including a gas source part, an evaluation kettle, a liquid part and an intermediate container part;

[0066] The gas source part includes a carbon dioxide gas source;

[0067] The evaluation kettle 17 includes a cylindrical kettle body, a first piston 15 is arranged in the cylindrical kettle body, a first group of valves 14 and a second group of valves are respectively arranged at both axial ends of the cylindrical kettle body. Valve 18, the first piston 15 divides the cylindrical kettle body into a displacement chamber 17-1 and a mixing chamber 17-2, wherein the displacement chamber 17-1 is connected to the first advection chamber through the first set of valves 14 The pump 12 is connected to the first liquid storage tank 11, and the mixing chamber 17-2 is respectively connected to the gas pipeline 18-1 and the liquid pipeline 18-2 through the second group of valves 18, and the gas pipeline ...

Embodiment 2

[0073] A device for evaluating the foaming performance of gas-soluble surfactants as described in Example 1, the difference is that the liquid carbon dioxide source includes a carbon dioxide cylinder 1, a dryer 2 and a refrigeration unit connected in sequence, and the refrigeration unit It includes a refrigerating cabinet 4 , a coil pipe 5 and a high-pressure storage tank 6 arranged in the refrigerating cabinet 4 .

Embodiment 3

[0075] A device for evaluating the foaming performance of gas-soluble surfactants as described in Example 1, the difference is that a first base 19 is installed at the bottom of the evaluation kettle 17, and the first base 19 drives the columnar The kettle body rotates along the horizontal axis; the pipelines respectively connected to the evaluation kettle 17 are all flexible pipelines.

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Abstract

The invention relates to a device for evaluating the foaming property of an air-soluble surface active agent. The device comprises an air source part, an evaluating kettle, a liquid part and an intermediate container part. The evaluating kettle in the device is internally provided with a first piston, so that the pressure of the evaluating kettle can be maintained or raised by the means that the distilled water is pumped into the evaluating kettle by a first constant-flux pump in the process of test; the pressure of the evaluating kettle can be reduced by the means that the distilled water is discharged out by the means that a first set of valves are turned on, so that the control for the pressure of the evaluating kettle can be realized, and the cloud point pressure and the cloud point temperature of the air-soluble surface active agent in supercritical carbon dioxide can be conveniently measured. Through the rotating of the evaluating kettle, the air-soluble surface active agent and the supercritical carbon dioxide can be sufficiently and evenly mixed with each other when the solubility of the air-soluble surface active agent in the supercritical carbon dioxide is measured, so that the phase equilibrium status can be achieved; and the foam regenerating property of the air-soluble surface active agent can be evaluated since the air-soluble surface active agent can float under the action of the gravitational differentiation of the evaluating kettle when the regenerating property of the air-soluble surface active agent is measured after the foam of the air-soluble surface active agent bursts.

Description

technical field [0001] The invention relates to a device for evaluating the foaming performance of an air-soluble surfactant and an application thereof, and belongs to the technical field of research on improving the production efficiency of oil and gas fields by carbon dioxide. Background technique [0002] Inject carbon dioxide (CO 2 ) EOR technology has been developed for more than 50 years, and has become an important EOR technology and has been widely used in the world. Among the total number of global EOR projects, the number of gas drive projects accounts for 54%, that is, nearly half of the global EOR projects are gas drive projects; among all gas drive projects, only CO 2 The number of projects accounted for nearly 77%; thus CO 2 Flooding enhanced oil recovery technology accounts for 41.46% of the total number of global EOR projects, and has become one of the most important enhanced oil recovery technologies. [0003] However, when carbon dioxide flooding technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01F13/00C09K8/92G01N13/00C09K8/94
Inventor 李兆敏张超李宾飞李松岩刘己全董全伟
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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