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Multicomponent copolymer containing long chain side groups and preparation and application of multicomponent copolymer

A multi-copolymer, long-chain technology, used in drilling compositions, mechanical equipment, chemical instruments and methods, etc., can solve the problems of low surface activity, poor emulsion stability, increased crude oil viscosity, etc., and achieve easy copolymerization chain. Growth reaction, enhanced surface activity, improved stability effects

Active Publication Date: 2020-02-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have shown that the emulsion formed by small molecule emulsifiers has poor stability, and it is easy to reverse phase into a W / O emulsion with high viscosity, which will increase the viscosity of crude oil instead.
Most of the acrylamide polymers studied at present improve the viscosity-increasing performance by adding hydrophobic monomers, but the surface activity is not high, and it is difficult to emulsify crude oil to form O / W emulsion

Method used

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  • Multicomponent copolymer containing long chain side groups and preparation and application of multicomponent copolymer
  • Multicomponent copolymer containing long chain side groups and preparation and application of multicomponent copolymer
  • Multicomponent copolymer containing long chain side groups and preparation and application of multicomponent copolymer

Examples

Experimental program
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Effect test

Embodiment 1

[0042] This embodiment provides a multi-component copolymer containing long-chain side groups, which is actually prepared by the following steps:

[0043] Take by weighing 28.36g monomer E (R 1 for NH 2 , namely acrylamide), 5.36g monomer F, 0.58g lipophilic monomer G (R 2 is H, m=2, R 3 for C 8 Alkyl), 4.36g polyether reactive macromonomer H (R 4 is H, x is 2, y is 50) in a dissolver, add 104.6g of deionized water and stir to dissolve, then add 4.08g of sodium carbonate and stir to dissolve, adjust the temperature to 15°C, transfer the solution to the reactor, add 2.88 g of 3.0% EDTA disodium solution, 1.28g of 6.0% sodium formate solution, 2.4g of 1.5% sodium bisulfite and other polymerization aids, after passing through nitrogen for 30min, add 4.8g of 0.7% potassium persulfate, 3.2g of 0.25% 2,2-azobisisobutylamidine dihydrochloride, continue to pass nitrogen for 10 minutes and then seal the reactor. After 4 hours, the reaction is completed, and the rubber block is hea...

Embodiment 2

[0049] The present embodiment provides a multi-component copolymer containing long-chain side groups. The preparation steps and monomer ratio are as follows: Weigh 25.13g monomer E (R 1 for NH 2 , ie acrylamide), 6.56g monomer F, 1.18g lipophilic monomer G (R 2 is H, m=2, R 3 for C 8 Alkyl), 5.81g polyether reactive macromonomer H (R 4 is H, x is 2, y is 40) in the dissolver, add 103.2g of deionized water and stir to dissolve, then add 4.18g of sodium carbonate and stir to dissolve, adjust the temperature to 15°C, transfer the solution to the reactor, add 3.18 g3.0% EDTA disodium solution, 1.38g 6% sodium hypophosphite solution and other polymerization aids, after passing through nitrogen for 30min, add 5.81g of 0.7% ammonium persulfate, 4.74g of 0.25% azobisisobutyl Amidine hydrochloride, continue to pass nitrogen for 10 minutes, and then seal the reactor. After 4 hours, the reaction is completed. The rubber block is heated to 80° C. and matured for 2 hours to obtain a po...

Embodiment 3

[0051] This example provides a multi-component copolymer containing long-chain side groups, and the preparation steps are the same as Example 1 (without adding alkali for neutralization).

[0052] This implementation provides a multi-component copolymer containing long-chain side groups. The preparation steps and monomer ratio are as follows: Weigh 25.2g monomer E (R 1 is ONa, i.e. sodium acrylate), 7.11g monomer F, 1.90g lipophilic monomer G (R 2 is H, m=3, R 3 for C 12 Alkyl), 7.92g polyether reactive macromonomer H (R 4 is H, x is 2, and y is 30) in a dissolver, add 109.3g of deionized water and stir to dissolve, then add 2.5g of 5.0% sodium lauryl sulfate solution and stir to dissolve, adjust the temperature to 15°C, and The solution was transferred to the reactor, 2.88g of 0.7% disodium EDTA solution, 1.6g of 6% sodium formate solution and other polymerization aids were added, and after 30min of nitrogen gas, 6.2g of 0.7% potassium persulfate, 5.8g of 0.25 % 2,2-Azobi...

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Abstract

The invention provides a multicomponent copolymer containing long chain side groups and preparation and application of the multicomponent copolymer. The copolymer consists of a polyether active macromonomer CH2=C(R4)-O-(CH2) x-O-(CH2-CH2-O) y-H, an oleophylic monomer CH2=C(R2)-C(O)-N(R3)-(CH2) m-C6H5 and the like with an acrylamide or acrylate monomer through copolymerization under a low temperature composite initialization condition. The copolymer contains active groups such as long chain polyether side groups, oleophylic side groups and anion side groups in the structure and has excellent emulsification and dispersing properties. The molecular weight of the copolymer is 2-21 million, and the copolymer has a certain thickening capability. The copolymer can be used in production processessuch as emulsification and viscosity reduction, oil displacement and gathering and transportation of common crude oil or heavy oil, and can also be used in related oilfield chemical fields such as preparation of drilling fluids, profile control and water plugging and sewage and sludge treatment. The copolymer is simple in synthesis process and small in environmental pollution and has broad industrial application prospects.

Description

technical field [0001] The present invention relates to the field of petrochemical industry. Specifically, the present invention relates to a multi-polymer copolymer containing long chain side groups and its preparation and application, especially to a kind of common crude oil or heavy oil exploitation, gathering and transportation and drilling fluid, Multi-component copolymers containing long-chain side groups used in oilfield chemical fields such as profile control, water shutoff, and sewage sludge treatment. Background technique [0002] In order to enhance oil recovery, water flooding, polymer flooding and polymer / alkali / surfactant composite flooding have been implemented on a large scale in my country. The main technical principle of polymer flooding is to increase the viscosity of the water phase, improve the oil-water mobility ratio, and increase the sweep coefficient by adding high molecular weight polymers such as anionic polyacrylamide. Polymer / alkali / surfactant c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/56C08F220/58C08F220/54C09K8/584C09K8/508C09K8/035F17D1/08C02F1/00C02F11/00C02F103/10
CPCC08F283/065C09K8/584C09K8/5083C09K8/035F17D1/08C02F1/00C02F11/00C02F2103/10C08F220/56
Inventor 刘国良张付生屈沅治朱卓岩管保山孙江河
Owner PETROCHINA CO LTD
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