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High-molecular polymer oil displacement surfactant for oil field and preparation method of high-molecular polymer oil displacement surfactant

A high-molecular polymer and surfactant technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problem of low descaling rate

Active Publication Date: 2020-10-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained descaling performance is stable, and its performance is better than that of inorganic acid and organic acid, but the descaling rate is low

Method used

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  • High-molecular polymer oil displacement surfactant for oil field and preparation method of high-molecular polymer oil displacement surfactant
  • High-molecular polymer oil displacement surfactant for oil field and preparation method of high-molecular polymer oil displacement surfactant
  • High-molecular polymer oil displacement surfactant for oil field and preparation method of high-molecular polymer oil displacement surfactant

Examples

Experimental program
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Effect test

Embodiment 1

[0048] The preparation method of polymer flooding surfactant of the present invention:

[0049] The first step, the synthesis of DMAG polymer

[0050] From the three aspects of the functional groups contained, the unsaturated hydrocarbon bonds contained and the cost of use, dimethyl maleate (DDM) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) containing hydrophilic groups are selected. ), dehydrated glycerol methacrylate (GMA) and maleic anhydride (MA) as reactive monomers.

[0051] The synthetic experiment adopts aqueous solution polymerization technology, and initiator selects water-soluble initiator azobisisopropyl imidazolinate (AIBI), and experiment first reacts monomer (in this embodiment DDM:MA:AMPS:GMA) with 10g different proportions The mass ratio is 1:6:2.5:0.5) into 50mL of distilled water to dissolve, then pass nitrogen gas for 30min to remove the oxygen in the device, heat and stir and add 5% of the total amount of monomer dropwise, the temperature is selecte...

Embodiment 2

[0057] The difference from Example 1 is that in the synthesis of DMAG polymer, the mass ratio of DDM:MA:AMPS:GMA is 3:4:2.5:0.5 in sequence.

Embodiment 3

[0059] The difference from Example 1 is that in the synthesis of DMAG polymer, the mass ratio of DDM:MA:AMPS:GMA is 4:3:2.5:0.5 in sequence.

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Abstract

The invention discloses a high-molecular polymer oil displacement surfactant for an oil field and a preparation method of the high-molecular polymer oil displacement surfactant and belongs to the technical field of oil field development. The high-molecular polymer oil displacement surfactant is prepared from a DMAG quaternary polymer and an AS polymer; the DMAG quaternary polymer is composed of areaction monomer, an initiator and distilled water; the reaction monomer is composed of dimethyl maleate, maleic anhydride, 2-acrylamide-2-methylpropanesulfonic acid and dehydrated glyceryl methacrylate; the initiator is azodiisopropylimidazoline acid salt; the AS polymer is polymerized in distilled water by taking acrylamide and vinylbenzene sulfonic acid as reaction monomers, 2,2'-Azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride(AIBI) as an initiator and mercaptoethylamine sulfonate as a chain transfer agent. The prepared oil displacement surfactant and crude oil form emulsion, the viscosity of the crude oil can be effectively reduced, remaining oil in stratum gaps can be effectively exploited, and the exploitation requirement of an oil field for thick oil and pore remaining oil is met.

Description

technical field [0001] The invention belongs to the technical field of oil field development, in particular to a polymer oil displacement surfactant for oil field development, in particular to a high molecular polymer oil displacement surfactant for oil field and a preparation method thereof. Background technique [0002] Due to the continuous improvement of the development of conventional oil reservoirs, the demand for the recovery of heavy oil and pore remaining oil continues to increase. At this stage, surfactants have become commonly used viscosity-reducing oil displacement agents in oil fields. Water-soluble surfactants can not only increase the surface activity of injected water, but also reduce the surface tension of water, thereby improving the flow ability of injected water in formation pores and improving the sweep coefficient. It can also reduce the interfacial tension of oil and water, promote the emulsification and viscosity reduction of heavy oil, make crude oi...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/588C09K8/88C08F222/06C08F222/14C08F220/58C08F220/32C08F220/56C08F212/14
CPCC09K8/584C09K8/882C08F222/06C08F220/56C08F222/14C08F220/585C08F220/325C08F212/30
Inventor 曲占庆樊家铖郭天魁齐宁罗明良唐梅荣吴飞鹏芮振华陈铭刘晓强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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