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A warm viscosity-increasing active polymer viscosity reducer and its preparation method and application

A technology of active polymer and viscosity reducer, which is applied in the field of temperature-increased active polymer viscosity-reducer and its preparation, can solve the problem of low molecular weight of temperature-increased polymers, less temperature-sensitive monomers, and temperature-increased viscosity-increased polymers. Can not use heavy oil viscosity reducer and other problems, to achieve the effect of improving injection capacity, improving recovery factor, and good heavy oil viscosity reducing ability

Active Publication Date: 2022-07-22
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that there are few temperature-sensitive monomers in temperature-increasing polymers, the relative molecular weight of temperature-increasing polymers is generally low, and temperature-increasing polymers cannot be used as heavy oil viscosity reducers

Method used

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  • A warm viscosity-increasing active polymer viscosity reducer and its preparation method and application
  • A warm viscosity-increasing active polymer viscosity reducer and its preparation method and application
  • A warm viscosity-increasing active polymer viscosity reducer and its preparation method and application

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preparation example Construction

[0043] In one or some embodiments of the present disclosure, a method for preparing a warm viscosity-increasing active polymer is provided, comprising the following steps: (1) Synthesis of a temperature-sensitive monomer: dissolving hydrophilic and hydrophobic monomers in deionized water, In a nitrogen environment, an initiator and a chain transfer agent are added to react to obtain a temperature-sensitive monomer containing terminal amine groups;

[0044](2) Synthesis of warm viscosity-increasing polymer: dissolve the temperature-sensitive monomer and partially hydrolyzed polyacrylamide in deionized water, prepare a mixed solution with a certain mass concentration, adjust the pH to neutrality, and add a set amount of condensing agent After reacting for a period of time, the reactant is washed and dried to a constant weight to obtain a warm viscosity-increasing polymer.

[0045] Among them, it should be understood that in step (1), the role of the terminal amine group is to ma...

Embodiment 1

[0069] This embodiment provides the preparation process of the temperature-sensitive monomer, which includes the following steps: dissolving acrylamide and diacetone acrylamide in deionized water in a molar ratio of 4.5:5.5 and 5.5:4.5, and adding potassium persulfate as a The initiator, mercaptoethylamine hydrochloride as a chain transfer agent, was reacted at 30° C. for 6 hours to obtain temperature-sensitive monomers AM-DAAM-1 and AM-DAAM-2 containing terminal amine groups.

Embodiment 2

[0071] This embodiment provides the preparation process of the temperature-viscosity-increasing polymer viscosity reducers PAAD-1 and PAAD-2, including the following steps: dissolving the temperature-sensitive monomers AM-DAAM-1 and AM-DAAM-2 in water, Add a partially hydrolyzed polyacrylamide aqueous solution (the molar ratio of temperature-sensitive monomer and partially hydrolyzed polyacrylamide is 10:1), make up an aqueous solution with a mass concentration of 3%, adjust the pH to neutrality, add a condensing agent, and at 25 ° C The reaction was taken out for 24 hours. The reactants were washed with absolute ethanol and dried in a 45°C incubator to constant weight. That is, the warm viscosity-increasing polymer viscosity reducers PAAD-1 and PAAD-2 are obtained.

[0072] The response temperature of PAAD-1 is 55℃, and the response temperature of PAAD-2 is 45℃.

[0073] Infrared spectroscopic analysis of warm viscosity-increasing polymer viscosity reducer PAAD-2, see figu...

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Abstract

The present disclosure belongs to the field of heavy oil exploitation, and relates to a warm viscosity-increasing active polymer viscosity reducer and a preparation method and application thereof. The polymer represented by formula (1): wherein, R1, R2, R3 are selected from one of hydrogen and alkyl; R4 is one of alkyl or alkenyl; X represents the number of acrylamide monomers, and Y represents acrylic acid The number of monomers, n is the number of hydrophilic monomers in the thermosensitive monomer, and m is the number of hydrophobic monomers in the thermosensitive monomer. Solve the problems that there are few temperature-sensitive monomers in the current warm-viscosity polymer, the relative molecular weight of the warm-viscosity polymer is generally low, and the warm-viscosity polymer cannot be used as a viscosity reducer for heavy oil.

Description

technical field [0001] The present disclosure belongs to the field of heavy oil exploitation, and relates to a temperature-viscosity-increasing active polymer viscosity reducer and a preparation method and application thereof. Background technique [0002] The statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] With the development of the global economic situation, the demand for energy in all walks of life has steadily increased. Oil remains the mainstay of this century. As a potential resource, heavy oil has considerable reserves (total reserves of about 9-13×10 12 barrels), far exceeding the reserves of traditional light oil, which can meet the energy demand in the next 40 years and has a bright future. How to realize more efficient and convenient development and utilization of heavy oil resources is the research focus in the field of oilfield chemistry. [0004] The viscosity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F265/10C08F220/60C09K8/588C09K8/584
CPCC08F265/10C09K8/588C09K8/584C08F220/606
Inventor 康万利王瞳煜杨红斌李哲张德文张苇琪范海明张亮吕志琦徐喆
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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