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Polyacrylamide particle oil displacement agent and preparation method thereof

A polyacrylamide oil displacement agent, polyacrylamide technology, applied in the preparation and application of polymer materials, can solve the problems of oil displacement agent failure and achieve good oil displacement effect

Inactive Publication Date: 2019-01-15
RES INST OF PETROLEUM EXPLORATION & DEV SHENGLI OILFIELD CO LTD SINOPEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oil-displacing agent of the present invention effectively solves the problem of rapid failure of the oil-displacing agent due to dilution, degradation, adsorption, and changes in acid-base conditions after the conventional linear partially hydrolyzed polyacrylamide (HPAM) enters the formation.

Method used

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  • Polyacrylamide particle oil displacement agent and preparation method thereof
  • Polyacrylamide particle oil displacement agent and preparation method thereof
  • Polyacrylamide particle oil displacement agent and preparation method thereof

Examples

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preparation example Construction

[0038] The above step a is the preparation step of the crosslinking agent solution. The polyethylene polyamines include amines containing 2 to 4 ethylene groups and 2 to 5 primary or secondary amine groups, preferably having a longer chain structure with multiple primary or secondary amine groups (at least one primary amine, preferably all primary amines), such as tetraethylenepentamine, triethylenetetramine, diethylenetriamine, etc.

[0039] The reaction of polyethylene polyamine with allyl glycidyl ether or glycidyl (meth)acrylate in aqueous solution is a ring-opening addition reaction. Take the reaction of allyl glycidyl ether and tetraethylenepentamine as an example, such as from figure 1 It can be seen that the two hydrogen atoms on the allyl glycidyl ether molecule with different chemical environments from the adjacent carbons of the ether bond become two hydrogen atoms with the same chemical environment after reacting with tetraethylenepentamine and move to the downfie...

Embodiment A

[0069] Example A: Dissolve tetraethylenepentamine and allyl glycidyl ether with a molar ratio of 1:4 in 100 parts of water, adjust the mass fraction of the solute to 6.54%, and prepare the prepared reactant in a condenser equipped with In the reaction device of temperature controller and stirrer, react at 75° C. for 6 hours to prepare multifunctional crosslinking agent solution A.

[0070] The H NMR spectra of the reactant allyl glycidyl ether and the reaction product are as follows: figure 1 Shown, the liquid chromatography-mass spectrometry test result of gained cross-linking agent is as follows figure 2 shown. The proton nuclear magnetic resonance spectrum was carried out on the AV600 model NMR instrument of Bruker Company, and the liquid chromatography-mass spectrometry was carried out on the 1100MSD model chromatograph-mass spectrometry instrument of Aqilent Company, and the chromatographic conditions were: a reversed-phase silica gel column was used, and the mobile pha...

Embodiment B

[0071] Example B: Tetraethylenepentamine and allyl glycidyl ether with a molar ratio of 1:4 were dissolved in 100 parts of water, and the mass fraction of the solute was adjusted to 6.54%, and the prepared reactant was equipped with a condenser, In the reaction device of temperature controller and stirrer, react at 50°C for 6 hours to prepare multifunctional crosslinking agent solution B

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Abstract

The invention relates to a polyacrylamide oil displacement agent and a preparation method thereof. The polyacrylamide oil displacement agent provided by the invention has a polyacrylamide structure with the co-existence of a crosslinked network structure formed with a multifunctional crosslinking agent as the crosslinking center and a branched chain structure. Specifically, the crosslinked structure accounts for 60%-95% in the whole polyacrylamide structure, and the multifunctional crosslinking agent is obtained by reaction of allyl glycidyl ether or (methyl) glycidyl acrylate and polyethylenepolyamine. The oil displacement agent provided by the invention has high elasticity, viscosity and deformation restorability at the same time, also can ensure excellent long-term aging resistance ina high temperature and high salinity environment, and is conducive to application in tertiary oil recovery.

Description

technical field [0001] The invention relates to a polyacrylamide particle oil displacement agent and a preparation method thereof, and belongs to the field of preparation and application of polymer materials. Background technique [0002] Petroleum is a non-renewable resource and the basic raw material of energy and chemical industry, which plays an important role in the development of national economy. However, the main oilfields in my country have entered the middle and late stage of secondary recovery at present. The reservoirs and oil layers of the oilfields are seriously degraded, often of high-temperature and high-salt type. Only through tertiary oil recovery can about 60% of the remaining oil be effectively extracted. This has important practical significance for ensuring my country's long-term energy security and sustainable economic development. Polyacrylamide (PAM) has the advantages of good water solubility and high viscosity, and is an ideal key polymer material...

Claims

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Application Information

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IPC IPC(8): C09K8/588C08F220/56C08F216/14C08F4/40
CPCC08F4/40C08F220/56C09K8/588C08F216/1458
Inventor 曹绪龙黄光速郭兰磊祝仰文郑静李江波刘汉超姜祖明王义曹振兴刘坤陈晓彦
Owner RES INST OF PETROLEUM EXPLORATION & DEV SHENGLI OILFIELD CO LTD SINOPEC
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