A foam stability testing device and working method under pressure fluctuation

A technology of foam stability and testing equipment, which is applied in measuring equipment, fluid dynamics testing, testing of machine/structural components, etc. It can solve the problem of not considering the influence of pressure factors, the inability to simulate the pressure change environment, and affecting the reliability of test data and other issues to achieve the effect of strong pressure resistance and high reliability

Active Publication Date: 2017-07-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is a typical method of testing foam stability under normal pressure. This test method does not consider the influence of pressure factors and cannot simulate the pressure change environment during fracturing construction, which will affect the reliability of test data.

Method used

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  • A foam stability testing device and working method under pressure fluctuation
  • A foam stability testing device and working method under pressure fluctuation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A foam stability testing device under pressure fluctuations, comprising a foam generating part, a foam testing part, a pressure regulating part and a cleaning part; the foam generating part, the pressure regulating part and the cleaning part are respectively connected in parallel with the foam testing part, and realized by valve control : Separate series connection of foam generation part and foam test part; separate series connection of pressure regulation part and foam test part; separate series connection of cleaning part and foam test part.

[0042] The foam generating part includes a gas cylinder 24, a gas flow controller 16, a third valve 15, a first one-way valve 14, a foam generator 18, a seventh valve 11 and a second one-way valve connected in sequence along the gas flow direction 25. A foaming liquid intermediate container 19 is arranged in parallel with the foam generator 18, and the bottom of the foaming liquid intermediate container 19 is connected with an a...

Embodiment 2

[0049] A kind of working method that utilizes testing device test foam stability under pressure fluctuation as described in embodiment 1, comprises steps as follows:

[0050] (1) Start the test device:

[0051] Connect the various components of the test device, start the electric control box 2, start the advection pump 23, and start the gas flow controller 16;

[0052] (2) Exhaust:

[0053] Open the valve first valve 7, the second valve 10; close the seventh valve 11; adjust the electric control box 2 to control the high-torque stepping motor 1 after the piston 9 is raised to the top of the test cylinder 4, open the seventh valve 11, The fourth valve 17, the sixth valve 22; close the first valve 7, the fifth valve 21; adjust the advection pump 23, drive the distilled water in the distilled water intermediate container 20 into the test cylinder 4, until the distilled water flows out from the back pressure valve 8, Stop the advection pump 23;

[0054] (3) Generate foam:

[0...

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PUM

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Abstract

A foam stability testing device under pressure fluctuations, a foam stability testing device under pressure fluctuations, comprising a foam generating part, a foam testing part, a pressure regulating part and a cleaning part; the foam generating part, the pressure regulating part and the cleaning part They are respectively connected in parallel with the foam testing section, and realized through valve control: the separate series connection of the foam generating section and the foam testing section; the separate series connection of the pressure regulation section and the foam testing section; the separate series connection of the cleaning section and the foam testing section. The invention realizes the test of the foam stability under the condition of pressure fluctuation, and makes up for the defect that the existing foam stability evaluation technology in the field of oil and gas fields does not consider the influence of variable pressure. The invention realizes the visual observation of the foam state under variable pressure conditions, and is of great significance for further studying the changes of foam microscopic forms under variable pressure conditions. The invention has strong pressure resistance, and the test data are all completed under pressure, and the experimental data is closer to the oil and gas field production site, with high reliability.

Description

technical field [0001] The invention relates to a foam stability testing device under pressure fluctuations and a working method, belonging to the technical field of foam fluid performance testing devices for petroleum and natural gas development. Background technique [0002] As an intelligent, efficient, environmentally friendly and economical fluid, foam has been widely used in oil and gas development at home and abroad, especially in drilling, well completion, fracturing, acidizing, oil production, gas production, profile control, water plugging, sand washing It shows unique performance advantages in production processes such as wells. A large number of oil and gas field development practices have shown that the use of foam fluid is an effective means to protect oil and gas layers, increase oil and gas production, and reduce production costs. [0003] The stability of the foam fluid is the basis for the effective performance of its various phases. In the process of usi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M10/00
Inventor 李兆敏吕其超李宾飞李松岩卢拥军邱晓慧张昀
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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