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Method for determining stability of profile control and flooding microsphere aqueous solution

A measurement method and a technique for adjusting and driving microspheres, which are applied to the analysis of materials, instruments, etc., can solve the problems of low reliability of the method and large differences in the results of adjusting and driving microspheres, and achieve the effect of simple and reliable methods and strong operability

Pending Publication Date: 2021-07-27
济南雅歌新材料科技有限公司
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Problems solved by technology

It provides a standard for the determination of the stability of different control and displacement microspheres, and solves the problems of large differences in the stability evaluation results of the control and displacement microspheres by visual observation and low reliability of the method

Method used

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Embodiment 1

[0023] (1) Add the regulating and displacing microspheres I to the water sample of 20000mg / L, stir evenly, make the target liquid, the concentration of regulating and displacing the microspheres I in the target liquid is 0.5%, and the measured turbidity N0 is 686; The solution was added into a centrifuge tube and centrifuged at a centrifugation speed of 2000rpm, a centrifugation time of 1min, a centrifugation temperature of 60°C, and the turbidity N1 measured after centrifugation was 604, and the microsphere I stability index S was 0.880;

[0024] (2) Add the regulating and displacing microspheres II to the water sample of 20000mg / L, stir evenly, and obtain the target liquid, the concentration of regulating and displacing microspheres I in the target liquid is 0.5%, and the measured turbidity N0 is 688; Add liquid into the centrifuge tube and carry out centrifugation, the centrifugation speed is 2000rpm, the centrifugation time is 1min, the centrifugation temperature is 60°C, a...

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Abstract

The invention discloses a method for determining the stability of a profile control and flooding microsphere aqueous solution, which comprises the following steps: adding profile control and flooding microspheres into a target water sample, uniformly stirring to prepare a target solution with the concentration of the profile control and flooding microspheres in the target solution being 0.1-1%, determining the turbidity of the target solution, and recording the turbidity as N0; adding the target solution into a centrifugal tube for centrifugation wherein, the centrifugation rotating speed is 2000-8000 rpm, the centrifugation time is 1-5 min, and the centrifugation temperature is 60-70 DEG C; after centrifugation is finished, absorbing middle-layer liquid, measuring turbidity, and recording as N1; and calculating the stability index, wherein S = N1 / N0, and the larger the value of S is, the higher the stability is. According to the method, the stability of different profile control and flooding microspheres in a water sample with the mineralization degree of 20000 mg / L can be accurately obtained; standards are provided for stability determination of different profile control and flooding microspheres, and the problems that stability evaluation results of existing profile control and flooding microspheres observed by naked eyes are large in difference, and the method is low in reliability are solved.

Description

technical field [0001] The invention relates to the field of petroleum technology, in particular to a method for measuring the stability of an aqueous solution of regulating and driving microspheres. Background technique [0002] Control and displacement microspheres are commonly used products in the field of oilfield development and production. By adding a certain concentration of microsphere system into the injected water, the control and displacement effect can be achieved and the crude oil production can be increased. Therefore, it is particularly important to investigate the stability of microspheres in water. However, in the current relevant standards, there is no evaluation method for the stability of the microsphere water solution. The stability of different control and displacement microspheres in different mineralized water samples is also very different. [0003] In most cases, the stability of the microsphere aqueous solution is only judged by the subjective im...

Claims

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Application Information

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IPC IPC(8): G01N15/00
CPCG01N15/00
Inventor 柳沛丰张立鹏
Owner 济南雅歌新材料科技有限公司
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