Preparation method and application of double-braid polymer surfactant containing long carbon chains

Abstract

The invention provides a preparation method and application of a double-braid polymer surfactant containing long carbon chains. The double-braid polymer surfactant has a structure as shown in formula(I), wherein x is 1-30; m / (m + n + p) * 100% = 90.3%-94.45%; n / (m + n + p) * 100% = 5.5%-9.5%; p / (m + n + p) * 100%=0.05%-0.2%. The surfactant provided by the invention enables thickened oil to form astable oil-in-water emulsion under the condition of low stratum shear, so that the purpose of viscosity reduction is achieved; certain tackifying performance on water phase is achieved, under the synergistic effect of the two components, the oil-water fluidity ratio is improved, so that the swept volume is enlarged, and the water drive recovery rate of the thickened oil is increased.

Description

technical field

[0001] The present invention relates to the field of chemical engineering, specifically, the present invention relates to a double-braided polymer surfactant and its preparation and application, more specifically, the present invention relates to a diisomeric tridecyl polyoxyethylene Double-braided polymer surfactant of ether maleic acid diester, its preparation method and application. Background technique

[0002] Heavy oil development methods include thermal recovery (steam huff and puff, steam flooding, burning oil layer, SPGD) and cold recovery (water flooding). my country's water flooding thick oil reserves account for 30.1% of the total heavy oil reserves, and the output of water flooding accounts for 30.1% of the total heavy oil production. 18%. Due to the high viscosity of heavy oil and serious reservoir heterogeneity, the recovery rate of heavy oil water flooding is only 5-30% (the recovery rate of thin oil water flooding is 40%).

[0003] In order t...

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