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A temperature-resistant and salt-resistant inverse emulsion control and flooding system, its preparation method and application

A temperature-resistant, salt-resistant, inverse emulsion technology, applied in temperature-resistant and salt-resistant inverse emulsion control and flooding system, preparation of temperature-resistant and salt-resistant inverse emulsion control and flooding system, temperature-resistant and salt-resistant inverse emulsion control and flooding system in The application field in reservoir control and displacement can solve the problems of poor stability and achieve stable and controllable microsphere particle size distribution and improve the effect of control and displacement

Active Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of poor stability of the emulsion control and flooding system under the condition of high temperature and high salt reservoirs existing in the prior art, and provide a new temperature-resistant and salt-resistant inverse emulsion control and flooding system, a temperature-resistant and salt-resistant Preparation method of inverse emulsion control and flooding system, temperature-resistant and salt-resistant inverse emulsion control and flooding system prepared by the method, and application of the temperature-resistant and salt-resistant inverse emulsion control and flooding system in reservoir control and flooding

Method used

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  • A temperature-resistant and salt-resistant inverse emulsion control and flooding system, its preparation method and application
  • A temperature-resistant and salt-resistant inverse emulsion control and flooding system, its preparation method and application
  • A temperature-resistant and salt-resistant inverse emulsion control and flooding system, its preparation method and application

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Embodiment approach

[0026] The present invention has no particular limitation on the method of uniformly mixing the monomer mixture aqueous solution with the oily solvent and emulsifier, for example, the above three components can be stirred and mixed uniformly at the same time, or any two of them can be mixed After homogenization, add the third component and continue mixing. According to a preferred embodiment of the present invention, the uniform mixing method is to first mix the oily solvent and emulsifier to form a continuous oil phase, and then mix the continuous oil phase with the monomer mixture aqueous solution, so that A more uniform and stable emulsion can be obtained, which is conducive to the smooth control of the subsequent inverse emulsion polymerization reaction.

[0027]The type and amount of the oily solvent and emulsifier are not particularly limited in the present invention. For example, relative to 100 parts by weight of the monomer mixture, the amount of the oily solvent can...

Embodiment 1

[0048] This example is used to illustrate the preparation method of the temperature-resistant and salt-resistant inverse emulsion control and flooding system provided by the present invention.

[0049] 60g of acrylamide, 15g of sodium acrylate, 54g of 2-acrylamido-2-methylpropanesulfonic acid and 0.25g of methylenebisacrylamide were dissolved in 90g of deionized water to obtain an aqueous solution, and adjusted with sodium carbonate The pH value of the aqueous solution is 7.2; 12g of Span 80 and 5g of Tween 80 are dissolved in 95g of white oil to obtain an oil phase, and then the aqueous solution and the oil phase are mixed, and emulsified by a high-speed disperser until the viscosity remains constant to obtain Stable white emulsion, injected into the reaction kettle. Under the condition of nitrogen protection, keep the temperature at 25°C and the stirring speed at 300rpm, add 0.5g EDTA-2Na, 0.8g urea aqueous solution (1% by weight) and 0.2g isopropanol, mix well, then add 1.0...

Embodiment 2

[0051] This example is used to illustrate the preparation method of the temperature-resistant and salt-resistant inverse emulsion control and flooding system provided by the present invention.

[0052]60g of acrylamide, 20g of itaconic acid, 60g of 2-acrylamido-2-propylpropanesulfonic acid and 0.25g of methylenebisacrylamide were dissolved in 90g of deionized water to obtain an aqueous solution, and hydrogenation was used to Sodium regulates the pH value of described aqueous solution to be 6.5; Dissolve 19.6g Siban 80 and 8.4g Tween 60 in 200g kerosene to obtain oily phase, then described aqueous solution and oily phase are mixed, utilize high-speed disperser to emulsify to viscosity Change to obtain a stable white emulsion, which is injected into the reaction kettle. Under the condition of nitrogen protection, keep the temperature at 25°C and the stirring speed at 300rpm, add 1g EDTA-2Na, 0.3g thiourea aqueous solution (1% by weight) and 0.03g tert-butanol, mix well, then add...

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Abstract

The invention relates to the field of temperature-resistant salt-resistant profile controlling and flooding systems, and discloses a temperature-resistant salt-resistant reversed-phase emulsion profile controlling and flooding system, and a preparation method and application thereof. The temperature-resistant salt-resistant reversed-phase emulsion profile controlling and flooding system is prepared by carrying out reversed-phase emulsion polymerization on a monomer mixture composed of a temperature-resistant salt-resistant monomer disclosed as Formula (1), acrylamide and an anionic monomer, wherein R1 and R2 are respectively and independently H or C1-C10 alkyl, n is a 1-20 whole number, and M is H, Li, Na, K or NH4. The temperature-resistant salt-resistant reversed-phase emulsion profile controlling and flooding system has very excellent temperature resistance, salt resistance and stability.

Description

technical field [0001] The present invention relates to the research field of temperature-resistant and salt-resistant inverse emulsion control and flooding system, in particular, to a temperature-resistant and salt-resistant inverse emulsion control and flooding system, a method for preparing a temperature-resistant and salt-resistant inverse emulsion control and flooding system, and the method The prepared temperature-resistant and salt-resistant inverse emulsion control and flooding system and the application of the temperature-resistant and salt-resistant inverse emulsion control and flooding system in reservoir control and flooding. Background technique [0002] More than 80% of my country's onshore oil is developed by water injection. At present, after primary and secondary oil recovery, the water content of the produced fluid continues to increase, and some large domestic oil fields have entered the stage of tertiary oil recovery. A reservoir is often composed of mul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/58C08F220/06C08F222/02C08F212/14C09K8/588
Inventor 方昭杜超伊卓张文龙胡晓娜刘希
Owner CHINA PETROLEUM & CHEM CORP
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