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Method for testing influence of pressures on leakage stoppage effect of super-absorbent resin

A water-absorbing resin, testing pressure technology, used in the application of stable tension/pressure to test material strength, fluid tightness testing, machine/structural component testing, etc., can solve problems such as loss, leakage, formation cracks, etc. Simple test steps and high test accuracy

Inactive Publication Date: 2012-05-23
常萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to incomplete statistics, domestic reserves of fractured and complex formations account for about 50% of the total reserves, but due to the development of formation fractures and holes, the problem of leakage is difficult to solve, and the resulting losses are extremely serious

Method used

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  • Method for testing influence of pressures on leakage stoppage effect of super-absorbent resin
  • Method for testing influence of pressures on leakage stoppage effect of super-absorbent resin

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Experimental program
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Embodiment

[0029] The present invention relates to a method for testing the influence of pressure on the plugging capacity of super absorbent resin, the specific steps of which are as follows:

[0030] (a) prepare superabsorbent resin and well slurry for subsequent use;

[0031] (b) Add quantitative river sand to different containers, and simulate loose and leaky formations through the sand bed;

[0032] (c) Add the mixed plugging fluid of super absorbent resin and well mud into different containers for leak plugging, and apply different pressures without using containers;

[0033] (d) Test the leakage amount in the same time respectively, so as to obtain the influence of the pressure on the plugging capacity of the superabsorbent resin.

[0034] In the step (b), the container is a steel cylinder.

[0035] In the step (b), the particle size of the river sand is not uniform, and is between 10 and 100 mesh.

[0036] In the step (c), the test temperature is 25°C.

[0037] In the step (d...

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Abstract

The invention discloses a method for testing influence of pressures on a leakage stoppage effect of super-absorbent resin. The method for testing influence of pressures on the leakage stoppage effect of the super-absorbent resin comprises the following steps of: preparing the super-absorbent resin and well slurry for later use; respectively adding quantitative river sand to different vessels; applying different pressures for leakage stoppage; and respectively testing leakage amounts within same time so as to obtain the influence of pressures on the leakage stoppage effect of the super-absorbent resin. The method disclosed by the invention can be used for testing the influence of different pressures on the leakage stoppage effect of the super-absorbent resin, has the advantages of high testing precision and simple test samples and provides a theoretical basis for application of the super-absorbent resin to leakage stoppage.

Description

technical field [0001] The invention relates to a method for testing the influence of pressure on the plugging ability of superabsorbent resin. Background technique [0002] Drilling fluid loss is a common downhole complication in drilling operations. Lost circulation can occur in shallow, medium and deep formations, and can also occur in formations of different geological ages, and may occur in formations of various lithologies. Some lost circulations are just a slow drop in the liquid level of the mud pool, while others have no entry but no exit. Once a loss occurs, it will not only delay the drilling operation time, prolong the drilling cycle, lose drilling fluid, damage oil and gas layers, and interfere with geological logging work, but also It may also cause a series of complex situations and accidents such as well collapse, drill sticking, and blowout, and even lead to the scrapping of the wellbore, resulting in major economic losses. Therefore, the occurrence of los...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01M3/00E21B33/13
Inventor 常萍
Owner 常萍
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