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Method for testing sand-suspending performance of foam fracturing fluid used for coal bed gas

A technology of foam fracturing fluid and testing method, which is applied in the direction of material inspection products, instruments, analysis materials, etc., can solve problems such as damage, reservoir permeability drop, etc., and achieve short test time, simple test process, and low test cost Effect

Inactive Publication Date: 2012-05-16
袁俊海
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AI Technical Summary

Problems solved by technology

Intrusion of fracturing fluid into the coal seam reservoir will cause damage and lead to a decrease in reservoir permeability due to the expansion of the coal matrix caused by the adsorption of the fracturing fluid and plugging cleats, which will limit the desorption of coalbed methane

Method used

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  • Method for testing sand-suspending performance of foam fracturing fluid used for coal bed gas

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Embodiment

[0045] A method for testing the suspended sand performance of a foam fracturing fluid for coalbed methane that the present invention relates to comprises the following steps:

[0046] (a) preparing foam fracturing fluid;

[0047] (b) Add foam fracturing fluid and conventional jelly fracturing fluid into the graduated cylinder respectively;

[0048] (c) adding ceramsite;

[0049] (d) Place the graduated cylinder in a constant temperature water bath;

[0050] (e) By observing the settling velocity of the ceramsite, analyze the suspended sand performance of the foam fracturing fluid.

[0051] In the step (a), the foam fracturing fluid is 100 grams.

[0052] In the step (a), the foam mass fraction in the foam fracturing fluid is 55%.

[0053] In the step (b), the volume of the measuring cylinder is 500ml.

[0054] In the step (c), ceramsite is added in a ratio of 25% to sand.

[0055] In the step (c), the densities of the ceramsite are different.

[0056] In the step (e), t...

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Abstract

The invention discloses a method for testing the sand-suspending performance of a foam fracturing fluid used for coal bed gas. The method testing the sand-suspending performance of the foam fracturing fluid used for the coal bed gas comprises the following steps: adding the foam fracturing fluid and a general gelled fracturing fluid into a measuring cylinder respectively, and adding ceramsite into the measuring cylinder; and placing the measuring cylinder into a thermostatic water bath, observing the sedimentation velocity of the ceramiste, analyzing the sand-suspending performance of the foam fracturing fluid and the like. By using the method in the invention, the sand-suspending performance of the foam fracturing fluid used for the coal bed gas can be detected accurately; and the method provides a theoretical basis for optimization of the foam fracturing fluid used for the coal bed gas, is short in test time, is low in test cost and is beneficial to popularization.

Description

technical field [0001] The invention relates to a method for testing the suspended sand performance of foam fracturing fluid for coal bed gas. Background technique [0002] Coalbed methane is a self-generated and self-storage unconventional natural gas that occurs in coal seams and their surrounding rocks. It is a new type of clean energy and high-quality chemical raw materials, and it is one of my country's important alternative energy sources in the 21st century. The development and utilization of coalbed methane is of great significance to alleviate the shortage of conventional oil and gas supply, improve the safety production conditions of coal mines, implement the sustainable development strategy of the national economy, and protect the atmospheric environment. [0003] (1) The development of coalbed methane industry is the need of national energy security [0004] With the rapid growth of the national economy, the demand for energy is increasing day by day, and the s...

Claims

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Application Information

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IPC IPC(8): G01N33/26G01N15/04
Inventor 袁俊海
Owner 袁俊海
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