Acrylamide copolymer oil-displacing agent containing phenothiazine and oleamide structures and synthesis method

A technology of acrylamide copolymer and acrylamide copolymerization, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of poor temperature resistance, salt resistance and shear dilution resistance, complicated operation and high cost of oil displacement agent problem, to achieve the effect of enhanced oil recovery, simple preparation method and easy operation

Inactive Publication Date: 2015-03-04
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a water-soluble quaternary copolymerization containing a rigid ring structure and a hydrophobic chain structure to solve the problems of existing oil displacement agents with poor temperature resistance, salt resistance and shear dilution resistance
[0006] Another o

Method used

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  • Acrylamide copolymer oil-displacing agent containing phenothiazine and oleamide structures and synthesis method
  • Acrylamide copolymer oil-displacing agent containing phenothiazine and oleamide structures and synthesis method
  • Acrylamide copolymer oil-displacing agent containing phenothiazine and oleamide structures and synthesis method

Examples

Experimental program
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Effect test

Example Embodiment

[0028] Example 1: Preparation of monomer N-allyl phenothiazine (NADP)

[0029] (1) Put 19.9 parts of phenothiazine and 50 parts of tetrahydrofuran into reactor 1, and stir at room temperature until all are dissolved;

[0030] (2) Slowly add 36 parts of NaH to the reactor 1. During the reaction, the temperature of the system is controlled below 10°C;

[0031] (3) Filter the product obtained in reactor 1 to remove the solid phase to obtain a liquid phase, and transfer the liquid phase to reactor 2;

[0032] (4) Slowly drip 144 parts of bromopropene into reactor 2, and during the dripping process, the system temperature is controlled below 10°C;

[0033] (5) After the dropwise addition is completed, place the reactor at room temperature and continue the reaction for 5 hours to obtain the crude product of the target product;

[0034] (6) Remove excess raw materials and solvent by distillation under reduced pressure to obtain light yellow solid N-allylphenothiazine.

Example Embodiment

[0035] Example 2 Preparation of quaternary polymer AM / AA / NADP / CON

Example Embodiment

[0063] Example 3 Structural characterization of quaternary polymer AM / AA / NADP / CON

[0064] The structure of the sample obtained in Experimental Example 2 in Example 2 was analyzed, and the technical method used for the analysis was infrared spectroscopy. After several times of purification of the above samples, the KBr tablet method was used to perform infrared spectroscopic characterization. The results are as follows figure 1 . From figure 1 It can be seen that the infrared spectrum contains —NH 2 , —OH, C—O, —CH 2 —. Absorption peaks of functional groups such as C=O and benzene ring. The above structure is consistent with the target copolymer.

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Abstract

The invention discloses an acrylamide copolymer oil-displacing agent containing phenothiazine and oleamide structures and a synthesis method of the acrylamide copolymer oil-displacing agent. The oil-displacing agent is prepared from 60-80 parts of acrylamide, 20-40 parts of acrylic acid, 0.5-0.9 part of N-allyl phenothiazine and 0.4-0.8 part of N-allyl oil amide as monomers (based on mass), 0.1-0.5 part of NaSO3-(NH4)2S2O8 as an initiating system, and alkylphenol ethoxylates (OP-10) as a solubilizer in a manner of micellar copolymerization for 6-10 hours in an aqueous solution at 30-40 DEG C when the pH is 5-9. The synthesis method of the oil-displacing agent has the advantages of simple method, high productivity, high economic efficiency and the like.

Description

technical field [0001] The invention relates to a tetrapolymer oil-displacing agent containing a rigid ring structure and a hydrophobic chain structure, which is used for oil displacement in oilfields of the petroleum industry to enhance crude oil recovery, and a synthesis method thereof. Background technique [0002] With the development of economy and society and the continuous deepening of industrialization, people's dependence on oil and its derivative products has become more and more obvious. However, with the continuous reduction of oil reserves and the increasing difficulty of oil field development, oil as a non-renewable resource has become more and more valuable. Therefore, there is an urgent need to redevelop oil fields to increase crude oil production. Enhanced oil recovery technology is the fundamental way to stabilize crude oil production in oilfields. As one of the main means of enhancing oil recovery, polymer flooding has a clear oil displacement mechanism,...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F226/06C08F226/02C09K8/588
Inventor 苟绍华敬东何杨赵鹏张勤周利华
Owner SOUTHWEST PETROLEUM UNIV
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