A supramolecular oil displacing agent and its preparation method

An oil displacing agent and supramolecular technology, applied in the field of supramolecular oil displacing agent and its preparation, can solve the problems of weak shear thickening ability, poor water solubility, poor surface properties, etc., so as to improve the solubilization ability and reduce the seepage resistance. , the effect of improving temperature resistance

Active Publication Date: 2021-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymer is based on forging polymerization such as acrylamide, and the temperature resistance is lower than 80°C; the polymer branch chain introduces sulfonate betaine, the quaternary ammonium salt cation content is low, the molecular self-assembly ability is poor, and the shear thickening ability is weak; the polymer Hydrophilic branched chain without hydroxyl, relatively poor water solubility, poor ability to improve reservoir wetting; benzene ring is on a larger branched chain, the number of parts is low, molecular rigidity is weak, and surface properties are poor

Method used

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  • A supramolecular oil displacing agent and its preparation method
  • A supramolecular oil displacing agent and its preparation method
  • A supramolecular oil displacing agent and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0032]Add an appropriate amount of reactants ethylene glycol monoallyl ether (AEO), trimethylallyl ammonium chloride (TMAAC), formaldehyde into a four-necked flask equipped with a stirrer, a constant pressure dropping funnel, a thermometer, and a condenser. Acrylic acid (MAA), p-methylstyrene (PMS) and phase transfer agent sodium dodecylbenzenesulfonate and solvent deionized water, wherein the molar ratio of reactants is n (ethylene glycol monoallyl ether) : n (trimethylallyl ammonium chloride): n (methacrylic acid): n (p-methylstyrene) = 3: 1: 6: 1; phase transfer agent sodium dodecylbenzene sulfonate and The mass ratio of reactants is w (sodium dodecylbenzenesulfonate): w (reactant) = 0.02: 1, and the mass ratio of solvent deionized water to reactant and phase transfer agent is w (deionized water): w( Reactant + phase transfer agent) = 1:1, first add 70% molar fraction of deionized water into the four-necked flask, and stir evenly. The mass of initiator ammonium persulfate ...

Embodiment 2

[0037] In a four-neck flask equipped with a stirrer, a constant pressure dropping funnel, a thermometer, and a condenser, add an appropriate amount of reactants glycerol allyl ether (AG), methacryloyloxyethyltrimethylammonium chloride (DMC), Acrylic acid (AA), styrene (St) and phase transfer agent nonylphenol polyoxyethylene ether and solvent deionized water, wherein the molar ratio of reactants is n (glycerin allyl ether): n (methacryloxy Ethyltrimethylammonium chloride): n (acrylic acid): n (styrene) = 4: 2: 8: 1; phase transfer agent nonylphenol polyoxyethylene ether-10 (OP-10) and reactant quality The ratio is w(nonylphenol polyoxyethylene ether-10):w(reactant)=0.01:1, the mass ratio of solvent deionized water to reactant and phase transfer agent is w(deionized water):w(reactant + phase transfer agent) = 1.5:1, first add 70% mole fraction of deionized water into the four-necked flask, and stir evenly. The mass of initiator sodium persulfate and reactant is w (sodium persu...

Embodiment 3

[0042] Add an appropriate amount of reactants allyl polyoxyethylene methyl ether (HPEG) (n=60), dimethyl diallyl chloride into a four-necked flask equipped with a stirrer, a constant pressure dropping funnel, a thermometer, and a condenser. Ammonium chloride (DMDAAC), acrylic acid (AA), styrene (St) and phase transfer agent nonylphenol polyoxyethylene ether and solvent deionized water, wherein the molar ratio of the reactants is n (allyl polyoxyethylene methyl Ether (n=60)): n (dimethyl diallyl ammonium chloride): n (acrylic acid): n (styrene) = 6: 3: 12: 1; phase transfer agent alkylphenol polyoxyethylene The mass ratio of ether-10 (OP-10) to reactant is w(alkylphenol polyoxyethylene ether-10):w(reactant)=0.02:1, the mass ratio of solvent deionized water to reactant and phase transfer agent It is w (deionized water): w (reactant + phase transfer agent) = 1.5:1, first add 70% mole fraction of deionized water into the four-necked flask, and stir evenly. Initiator ammonium pers...

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Abstract

The invention discloses a supramolecular oil displacing agent and a preparation method thereof. A functional supramolecular oil displacing agent is synthesized from hydrophilic monomers containing ether bonds, quaternary ammonium salt cationic monomers, etc., phase transfer agents and solvents. The invention utilizes the hydrophilic group in the molecular structure of the functional supramolecular oil displacing agent to make the rock more hydrophilic, reduces the interaction between crude oil and rock, and improves the wettability of the oil reservoir; it utilizes the interfacial activity of the zwitterionic polymer molecules to increase the oil content. It interacts with water molecules to improve the solubilization ability of crude oil; the use of cations and benzene ring groups can especially reduce the interaction between colloidal asphaltene molecules in crude oil, reduce condensation and viscosity, reduce seepage resistance, and solve the problem of conventional polymer flooding. Technical problems such as low oil agent efficiency. Compared with conventional polymer oil displacing agents, the use of functional supramolecular oil displacing agents can increase crude oil recovery by another 5% to 10%, improving the tertiary oil recovery benefits of oil fields.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a supramolecular oil displacement agent and a preparation method thereof. Background technique [0002] Energy is the material basis of human activities and the prerequisite for national economic development. Petroleum is widely used in daily life, industry, agriculture, military and other fields, which requires the petroleum industry to provide more petroleum products. Since 2010, most oilfields in my country have been under uninterrupted production for a long time, and almost all domestic oilfields have been in high and ultra-high water cut periods, but polymer flooding technology can still be used to continue development. Obtaining more oil and gas resources and increasing the recovery rate of crude oil are the core issues in the development of the oil field all over the world. Tertiary oil recovery technology is the most effective means of enhancing oil recov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F216/14C08F226/02C08F212/12C08F220/34C08F212/08C08F283/06C08F226/04C09K8/584C09K8/588
CPCC08F220/06C08F283/065C09K8/584C08F216/1416C08F226/02C08F212/12C08F220/34C08F212/08C08F226/04
Inventor 虞建业王彪吕红梅时冠兰
Owner CHINA PETROLEUM & CHEM CORP
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