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A kind of polymer with surface active function and its preparation method and application

A surface-active, polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of high injection pressure, slow development of medium and low permeability reservoirs, and blockage of reservoir voids.

Active Publication Date: 2018-09-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low molecular weight oil displacement polymers cannot meet the requirements of oil field performance indicators, while high molecular weight oil displacement polymers have clogged reservoir pores and high injection pressure under the conditions of medium and low permeability reservoirs, resulting in the development of medium and low permeability reservoirs. progress is slow

Method used

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  • A kind of polymer with surface active function and its preparation method and application
  • A kind of polymer with surface active function and its preparation method and application
  • A kind of polymer with surface active function and its preparation method and application

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preparation example Construction

[0031] The present invention also provides a method for preparing a polymer having a surface-active function, the method comprising: in the presence of an initiator and water as a solvent, monomer D, monomer E and monomer F are subjected to a solution polymerization reaction , wherein, the monomer D is a monomer having a structure shown in formula (4), the monomer E is a monomer having a structure shown in formula (5), and the monomer F is a monomer having a structure shown in formula (6) The monomer of the shown structure is based on the total amount of the monomer D, the monomer E and the monomer F, the amount of the monomer D is 5-60% by weight, and the monomer E The dosage of monomer F is 30-90% by weight, and the dosage of the monomer F is 0.1-10% by weight; the conditions of the solution polymerization reaction make the viscosity-average molecular weight of the polymer obtained after the polymerization reaction be 15 million-28 million;

[0032]

[0033] Among them, R...

Embodiment approach

[0050] According to a preferred embodiment of the present invention, the preparation method of the polymer with surface active function comprises the following steps:

[0051] (1) Under the condition that the pH value is 6-10, the monomer represented by the formula (4), the monomer represented by the formula (5) and the monomer represented by the formula (6) are contacted with water to obtain a mixture solution;

[0052] (2) contacting the mixture solution with a complexing agent and an auxiliary agent to obtain a solution to be polymerized;

[0053] (3) Under the conditions of the polymerization reaction, the solution to be polymerized is contacted with the initiator under the protection of nitrogen, wherein the polymerization reaction includes two stages in sequence, and the reaction conditions of the first stage include: the temperature is 0-25 °C, the time is 2.5-12 hours; the reaction conditions of the second stage include: the temperature is 30-80 °C, and the time is 2....

Embodiment 1

[0066] This example is used to illustrate the polymer with surface active function provided by the present invention and its preparation method.

[0067] (1) the functional monomer (R 7 for -CH 2 (CH 2 ) 2 CH 3 , n=8) was added to the polymerization reaction bottle (ie, the polymerization bottle), and 60.0 g of deionized water was added to dissolve to form an aqueous solution, and then solid sodium hydroxide was added to adjust the pH value to 6.0 to obtain a mixture solution;

[0068] (2) Add 1.0 g of 1% by weight of EDTA-2Na aqueous solution and 0.5 g of 1% by weight of urea aqueous solution to the above-mentioned mixture solution successively, and stir evenly to obtain a solution to be polymerized;

[0069] (3) The polymerization reaction bottle is put into a constant temperature water bath, and after 30 minutes of passing nitrogen to drive oxygen, add 0.1% by weight of potassium persulfate aqueous solution 3.0g and 0.1% by weight of sodium bisulfite aqueous solution 1....

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Abstract

The invention discloses a polymer with a surface active function, and a preparation method and an application thereof. The polymer with the surface active function contains a structural unit A, a structural unit B and a structural unit C; the structural unit A is a structural unit represented by the formula (1), the structural unit B is a structural unit represented by the formula (2), and the structural unit C is a structural unit represented by the formula (3); with the weight of the polymer with the surface active function as a benchmark, the content of the structural unit A is 5-60 wt.%, the content of the structural unit B is 30-90 wt.%, and the content of the structural unit C is 0.1-10 wt.%; the viscosity average molecular weight of the polymer is 15 million-28 million. The polymer provided by the invention has the advantages of good water solubility, strong viscosifying ability, good temperature and salt resistant performance and good surface activity, so that the polymer has good oil cleaning effect, and can be used as an oil-displacing polymer for low-medium permeability oil reservoirs.

Description

technical field [0001] The present invention relates to a polymer with surface active function, a method for preparing a polymer with surface active function, a polymer with surface active function prepared by the method, and the polymer with surface active function Application as oil displacing agent. Background technique [0002] At present, most of my country's oilfields have entered the middle and late stages of production, and tertiary oil recovery has become an important measure to enhance oil recovery and maintain oilfield production. At the same time, polymer flooding occupies a very important position in tertiary oil recovery. The main application in polymer flooding is partially hydrolyzed polyacrylamide, which has the characteristics of high molecular weight and good water solubility. However, under the conditions of high-temperature and high-salt reservoirs, partially hydrolyzed polyacrylamide has obvious defects in performance. Such as temperature resistance, p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/58C08F212/14C09K8/588
Inventor 赵方园于芳杨捷王晓春
Owner CHINA PETROLEUM & CHEM CORP
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