Polymer having surface activity function, preparation method and application thereof

A technology of surface activity and polymer, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of slow development of medium and low permeability reservoirs, blockage of reservoir pores, high injection pressure, etc., and achieve good oil washing ability, reducing surface tension, increasing the effect of hydrodynamic volume

Active Publication Date: 2017-01-11
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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  • Polymer having surface activity function, preparation method and application thereof
  • Polymer having surface activity function, preparation method and application thereof
  • Polymer having surface activity function, preparation method and application thereof

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preparation example Construction

[0031] The present invention also provides a method for preparing a polymer with surface active function, the method comprising: in the presence of an initiator and water as a solvent, carrying out a solution polymerization reaction of the monomer D, the monomer E and the monomer F , wherein the monomer D is a monomer with the structure shown in formula (4), the monomer E is a monomer with the structure shown in formula (5), and the monomer F is a monomer with the 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, the monomer E The dosage of the 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 are such that the viscosity average molecular weight of the polymer obtained after the polymerization reaction is 18 million-28 million;

[0032]

[0033...

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 of pH 6-10, the monomer represented by formula (4), the monomer represented by formula (5) and the monomer represented by formula (6) are contacted with water to obtain a mixture solution;

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

[0053] (3) Under the polymerization reaction conditions, the solution to be polymerized is contacted with the initiator under the protection of nitrogen, wherein the polymerization reaction includes two stages in turn, and the reaction conditions of the first stage include: the temperature is 0-25 ℃, the time is 2.5-12 hours; the reaction conditions of the second stage include: the temperature is 30-80 ℃, and the time is 2.5-10 hours.

[0054] According to the method o...

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) 11.8 g of acrylamide, 8.0 g of 2-acrylamido-2-methylpropanesulfonic acid and 0.2 g of the functional monomer (R 10 for -ch 2 (CH 2 ) 5 CH 3 , M 2 for NH 4 , n=4, ) was added to the polymerization reaction bottle (ie the polymerization bottle), 60.0 g of deionized water was added to dissolve it into an aqueous solution, and then solid sodium hydroxide was added to adjust the pH to 6.0 to obtain a mixture solution;

[0068] (2) successively add the EDTA-2Na aqueous solution 1.0g of 1 wt %, the urea aqueous solution 0.5 g of 1 wt % in the above-mentioned mixture solution, stir to obtain the solution to be polymerized;

[0069] (3) Put the polymerization reaction bottle into a constant temperature water bath, and after 30 minutes of nitrogen drive oxygen, add 3.0 g of a 0.1 % by weight aqueous potassium persulfate solut...

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Abstract

The invention discloses a polymer having surface activity function, a preparation method and an application thereof. The polymer contains a structural unit A, a structural unit B and a structural unit C, the structural unit A is shown in a formula (1), the structural unit B is shown in a formula (2), the structural unit C is shown in a formula (3), by taking the weight of the polymer as a reference, the content of the structural unit A is 5-60 wt%, the content of the structural unit B is 30-90 wt%, the content of the structural unit C is 0.1-10 wt%; and the viscosity average molecular weight of the polymer is 18 million-28 million. The polymer has the advantages of good water solubility, strong tackifying ability, and heatproof salt-resistance performance and good surface activity, so that the polymer has good oil-washing effect, and can be used as an oil displacement polymer of mid-low permeability reservoir.

Description

technical field [0001] The present invention relates to a polymer with surface active function, a preparation method of the polymer with surface active function, the 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 oilfields in my country have entered the middle and late stage, and tertiary oil recovery has become an important measure to improve oil recovery and maintain oilfield production. At the same time, polymer flooding plays a very important role 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 high temperature and high salt reservoir conditions, partially hydrolyzed polyacrylamide has obvious defects in performance. Such as temperature resistance, poor salt resistance, easy t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C08F216/14C09K8/584
Inventor 赵方园杨捷王晓春于芳
Owner CHINA PETROLEUM & CHEM CORP
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