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A kind of fluorine-containing polymer microemulsion wetting reversal agent and its preparation method and application

A technology of polymer emulsion and wetting reversal, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of limited application, poor solubility of fluorine monomers, limited types of fluorine monomers, etc.

Active Publication Date: 2022-05-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the solubility of fluorine monomers is poor, and the emulsification of the reaction system and the dispersion in the solution after polymerization have become the focus of research in this field, and the types of fluorine monomers are limited, which limits their applications.

Method used

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  • A kind of fluorine-containing polymer microemulsion wetting reversal agent and its preparation method and application
  • A kind of fluorine-containing polymer microemulsion wetting reversal agent and its preparation method and application
  • A kind of fluorine-containing polymer microemulsion wetting reversal agent and its preparation method and application

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Embodiment Construction

[0009] Technical scheme of the present invention is as follows:

[0010] A preparation method of a fluorine-containing polymer emulsion wetting reversal agent, comprising:

[0011] In the presence of an emulsifier, the fluorine-substituted acrylate monomer is emulsified in water;

[0012] Dissolve the acrylic monomer and initiator in an organic solvent, then drop it into the emulsion of fluorine-substituted acrylate, and carry out polymerization reaction at 75-85°C to obtain a polymer microemulsion wetting reversal agent;

[0013] The fluorine-substituted acrylate monomer is 2,3,4,5,5,5-hexafluoro-2,4-bis(trifluoromethyl)pentyl methacrylate ("12F" for short); the The acrylic monomer is acrylic acid, methacrylic acid, methyl methacrylate, ethyl methacrylate or butyl methacrylate.

[0014] According to the present invention, preferred processing conditions are as one or more of the following:

[0015] The emulsification of the fluorine-substituted acrylate monomer is carried ...

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Abstract

The invention relates to a fluorine-containing polymer microemulsion wetting reversal agent, a preparation method and application thereof. The fluorine-containing polymer microemulsion wetting reversal agent is prepared by the following method: in the presence of an emulsifier, emulsify the fluorine-substituted acrylate monomer in water; dissolve the acrylic monomer and the initiator in an organic solvent , and then drop into the emulsion of fluorine-substituted acrylate, and carry out polymerization reaction at 75-85°C to obtain a polymer microemulsion wetting reversal agent. The fluorine-containing polymer microemulsion wettability reversal agent is used to modify the reservoir layer, so that the reservoir layer changes from water wettability to hydrophobicity. The invention has mild reaction conditions and safe process; the fluorine-containing polymer wetting reversal agent is simple to use, has good compatibility with other water-soluble systems, and can be directly put into use without purification.

Description

technical field [0001] The invention relates to a fluorine-containing polymer microemulsion wetting reversal agent and a preparation method and application thereof, belonging to the technical field of oil and gas exploitation for oil and gas resource reservoir transformation. Background technique [0002] In the process of oil and gas field development, the wettability of the reservoir plays a vital role in the extraction of oil and gas and the flowback of working fluid. In the process of exploration and development of oil and gas fields, in various production operations such as drilling, well completion, fracturing, acidizing, water injection, well killing, etc., because the reservoir generally has good water wettability, the working fluid and oil and gas resources in the reservoir The migration resistance in the layer is relatively large, and in severe cases, it will cause water lock, increase the energy consumption in the production process, and reduce the oil and gas rec...

Claims

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Application Information

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IPC IPC(8): C08F220/24C08F220/18C08F220/14C08F2/26C08F2/30C09K8/588
CPCC08F220/24C08F2/26C08F2/30C09K8/588C08F220/14
Inventor 王彦玲梁雷刘斌汤龙皓
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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