Preparation method of depolymerized and dispersed viscosity reducer of heavy oil

Abstract

The invention discloses a preparation method of a depolymerized and dispersed viscosity reducer of heavy oil. The preparation method comprises selecting N,N-Dimethyloctadecylamine as a hydrophobic group monomer, and diethylene triamine, epoxy chloropropane and benzyl chloride as hydrophilic group monomers, and ethanol as a solvent. The preparation method sequentially comprises the following steps: (1) adding the N,N-Dimethyloctadecylamine (N,N-Dimethylhexadecylamine) and the ethanol to a reaction vessel with a stirring device, evenly mixing and keeping the mixture at constant temperature for 0.5h; (2) slowly dripping the epoxy chloropropane with a dropping funnel to the reaction vessel, heating to 70 DEG C-75 DEG C, and reacting for 1-4h to generate HDI-1; (3) dripping the epoxy chloropropane to the diethylene triamine at room temperature to generate HDI-2; (4) allowing reaction products in (3) and (2) to react to generate HDI-3; and (5) dripping the benzyl chloride with the dropping funnel to the HDI-3, evenly stirring the mixture, and reacting at increased temperature of 90-95 DEG C for 2-5h to obtain the target product HD.

Description

1. Technical field [0001] The invention relates to a preparation method of a heavy oil viscosity reducer in petroleum exploitation, in particular to a preparation method of a heavy oil depolymerization dispersion viscosity reducer. 2. Background technology [0002] Oil-soluble viscosity reducer and dispersion viscosity reducer are the primary methods to solve the fluidity of ultra-heavy oil. At present, high polymer oil-soluble viscosity reducers have been widely used. Most oil-soluble viscosity reducers mix high polymers with solvents to reduce the viscosity of super heavy oil. Asphaltene and asphaltenes have different molecular structures and molecular sizes, and the oil-soluble viscosity reducer has strong selectivity. Although oil-soluble chemical viscosity reduction technology can inhibit or disperse wax crystals, colloidal flakes, and asphaltene layers, it cannot make them disappear. It is a "palliative" rather than a "permanent" method, so the degree of viscosity red...

AI Technical Summary

Problems solved by technology

Although oil-soluble chemical viscosity reduction technology can inhibit or disperse wax crystals, colloidal flakes, and asphaltene layers, it cannot make them disappear. It is a "palliative" rather than a "permanent" method, so the degree of viscosity reduction is limited

If it has reached its functional limit and still cannot meet the technical requirements of oil transportation or oil recovery, it must be used in conjunction with other processes, which often reduces the application value of chemical viscosity reduction technology.

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