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Polymer with surface active function and preparation method thereof

A technology of surface activity and polymer, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high injection pressure, slow development of medium and low permeability reservoirs, clogging of reservoir voids, etc., and achieve improved sweep Coefficient, increase the oil washing effect, strong effect of viscosity increase

Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 with surface active function and preparation method thereof
  • Polymer with surface active function and preparation method thereof
  • Polymer with surface active function and preparation method thereof

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preparation example Construction

[0028] The present invention also provides a method for preparing a polymer with surface-active functions, the method comprising: under the conditions of a pH value of 6-10, under polymerization conditions, the monomer represented by formula (4), The monomer shown in formula (5), the monomer shown in formula (6), the solution that water, complexing agent and auxiliary agent form contact with initiator, with the total consumption mole number of monomer in the described polymkeric substance as Standard, the amount of the monomer shown in the formula (4) is 8-45 mol%, the amount of the monomer shown in the formula (5) is 50-91 mol%, and the amount of the monomer shown in the formula (6) The amount of the monomer is 0.001-5 mole %; the conditions of the polymerization reaction make the viscosity-average molecular weight of the polymer obtained after the polymerization reaction be 12 million-25 million; wherein, R 1 , R 2 , R 3 , R 4 and R 5 The same or different, each independ...

preparation example 1

[0064] This preparation example is used to illustrate the synthetic method of the monomer shown in the formula (6) in the embodiment 1:

Embodiment 1

[0067] In this embodiment, the method provided by the present invention is used to prepare the polymer 1-A with surface active function provided by the present invention, wherein the monomer described in formula (4) is 2-acrylamido-2-methylpropanesulfonic acid The monomer described in formula (5) is acrylamide; In the monomer described in formula (6) (hereinafter also referred to as functional monomer), m=1, n=2, R 6 and R 7 Both CH 3 , R 5 It is H, M is H, and its molecular weight is 283.

[0068] Specifically, this embodiment adopts the following method to carry out:

[0069] 1) Add acrylamide (166.2mmol), 2-acrylamido-2-methylpropanesulfonic acid (38.6mmol) and functional monomer (0.7mmol) into the polymerization reaction bottle (ie polymerization bottle), add deionized 50.0 g of water was dissolved to form an aqueous solution, and then sodium hydroxide was added to adjust the pH value to 8.0 to obtain a mixture solution;

[0070] 2) Add 1.0 g of 1% by weight EDTA-2Na ...

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Abstract

The present invention discloses a polymer with a surface active function and a preparation method thereof, the polymer contains a structural unit A, a structural unit B and a structural unit C, the structural unit A is represented by formula (1), the structural unit B is represented by formula (2), the structural unit C is represented by formula (3), on the basis of total use amount mole number of the structural units of the polymer, the content of the structural unit A accounts for 8-45 mol%, the content of the structural unit B accounts for 50-91 mol%, and the content of the structural unit C accounts for 0.001 to 5 mol%; the viscosity-average molecular weight of the polymer is 12 million-25 million; the polymer can be used as a flooding polymer for a reservoir with low to medium permeability, and has the advantages of good water solubility, strong tackability and good temperature tolerance and salt-resisting properties and surface activity, and the polymer has good oil washing effect.

Description

technical field [0001] The invention relates to the research field of water-soluble polymers with surface active functions and polymers for oil displacement to enhance oil recovery. Specifically, the invention relates to a polymer with surface active functions and a preparation method thereof. In particular, it refers to a polymer for oil displacement with surface active function and a preparation method thereof. Background technique [0002] The polymer used for oil displacement should have excellent performance, good water solubility, strong viscosification, be able to adapt to the environmental conditions of the injected oil layer (such as oil layer temperature and salinity), not easy to degrade, and have good anti-aging performance. Generally, there are three types of polymer oil displacement agents: synthetic polymers, biochemical polymers, and modified products of natural polymers. At present, the main oil displacement polymer used in oil field tertiary recovery is pa...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C08F212/14C09K8/584C09K8/588
Inventor 赵方园王晓春于芳杨捷高文骥
Owner CHINA PETROLEUM & CHEM CORP
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