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Betaine type zwitterionic polymer oil displacement agent and synthetic method thereof

A betaine and copolymer technology, which is applied in the field of betaine-type zwitterionic polymer oil displacement agent and synthesis, can solve the problems of poor temperature resistance and shear resistance, and achieves improved oil recovery, strong hydrophobicity, improved sticky effect

Inactive Publication Date: 2018-02-27
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a betaine-type zwitterionic polymer oil displacing agent to solve the problems of existing oil displacing agents such as temperature resistance, salt resistance, shear resistance and poor solubility

Method used

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  • Betaine type zwitterionic polymer oil displacement agent and synthetic method thereof
  • Betaine type zwitterionic polymer oil displacement agent and synthetic method thereof
  • Betaine type zwitterionic polymer oil displacement agent and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Synthesis of polymer oil displacement agent AM / AA / MDPS / NAPA

[0033] The synthetic method of polymer oil displacement agent AM / AA / MDPS / NAPA is as follows:

[0034] (1) Add 80 parts of AM, 18 parts of AA, 1 part of MDPS, 0.3 parts of NAPA and an appropriate amount of emulsifier into the three-necked flask, and stir in 0.5 mol / L sodium chloride solution until the monomers are completely dissolve;

[0035] (2) Adjust the pH of the solution to 7 with 1.0 part of NaOH, put it in 50 o C water bath constant temperature;

[0036] (3) Add 0.5 part of initiator AIBA to the solution, then pass nitrogen gas for 10 min, o C water bath constant temperature sealing reaction for 2 to 5 hours until the copolymerization reaction is completed;

[0037] (4) Precipitate the obtained polymer gel with absolute ethanol, wash, pulverize, and dry to obtain the white powdery polymer AM / AA / MDPS / NAPA.

Embodiment 2

[0038] Example 2 Structural characterization of polymer oil displacement agent AM / AA / MDPS / NAPA

[0039] The sample prepared by the test example in embodiment 1 is carried out structure analysis by infrared spectrogram, adopts KBr tablet method, by WQF-510A Fourier transform infrared spectrometer, the polymer oil displacement agent structure is characterized, and infrared spectrogram is as follows figure 1 shown. from figure 1 It can be seen: 3427.26 cm -1 It is the stretching vibration absorption peak of -OH; 3190.99 cm -1 for-NH 2 stretching vibration absorption peak; 2946.08 cm-1 is -CH 2- Stretching vibration absorption peak of C-H in middle; 1676.50 cm -1 、1555.34 cm -1 C=O stretching vibration absorption peak; 1458.41 cm -1 , 1391.77 cm -1 for CH 3 The bending vibration absorption peak of C-H in middle; 1088.87 cm -1 、1043.01cm -1 for-OSO 2 Stretching vibration absorption peak of S=O in middle; 656.78 cm -1 It is the bending vibration absorption peak of N—H i...

Embodiment 3

[0040] Example 3 Viscosity investigation of polymer oil displacement agent AM / AA / MDPS / NAPA

[0041] The polymer prepared by the test example in embodiment 1 is mixed with the aqueous solution of different concentration, uses Brookfield DV-Ⅲ+Pro viscometer (00 # or 62 # rotor), at a temperature of 20 o Under the condition of C, measure the apparent viscosity change situation of polymer, data such as figure 2 shown. It can be found from the figure that as the concentration of the polymer solution increases, the apparent viscosity increases greatly, which may be due to the attraction between the polymer molecular chains after the solution reaches a certain concentration, which strengthens the cohesion point between the chain segments, resulting in The hydrodynamic volume of the solution increases, and the apparent viscosity increases effectively. When the concentration reaches 3000 mg / L, the apparent viscosity of the polymer solution can reach 410.7 mPa·s. The results show ...

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Abstract

The invention discloses a betaine type zwitterionic polymer oil displacement agent and a synthetic method thereof. The zwitterionic copolymer is obtained by polymerizing 80 parts of acrylamide, 18 parts of acrylic acid, 1 part of 3-(3-methacrylamide propyl dimethylamino) propyl-1-sulfonate and 0.3 part of N-allyl-2-phenoxyacetamide as monomers and 0.2 to 0.8 part of 2,2'-azobis[2-methylpropionamidine] dihydrochloride as an initiator under the condition that the pH value is equal to 5-9 and the temperature is 50 DEG C for 2-5 hours through a sodium chloride solution of 0.5mol / L.

Description

technical field [0001] The invention relates to a betaine type zwitterionic polymer oil displacement agent used for enhancing oil recovery in the petroleum industry and a synthesis method. Background technique [0002] With the development of social economy, people are increasingly dependent on petroleum and its related products. However, with the continuous reduction of proven oil reserves and oil field development gradually turning to tight oil reservoirs with high temperature, high salinity, high water content and low permeability, oil is becoming more and more precious as a non-renewable resource . Therefore, there is an urgent need for more effective development of oil fields to increase oil production to meet the ever-increasing demands of industrial production and the like. Among them, enhanced oil recovery technology is one of the important ways to stabilize the oil production of existing oilfield resources. As the main means of enhancing oil recovery, polymer flo...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/06C08F226/02C08F220/60C09K8/584C09K8/588
CPCC08F220/56C09K8/584C09K8/882C08F220/06C08F226/02C08F220/606
Inventor 苟绍华张慧超张勤李世伟周艳婷费玉梅彭川
Owner SOUTHWEST PETROLEUM UNIV
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