Heavy oil viscosity reducer and preparation method thereof

Abstract

The invention provides a heavy oil viscosity reducer. Based on the total weight of the heavy oil viscosity reducer, the heavy oil viscosity reducer is prepared from 1 to 15 percent by weight of component A, 0.1 to 1.5 percent by weight of component B, 0.1 to 5 percent by weight of component C and water, totaling 100 percent, wherein the component A is at least two of ammonium nitrite, sodium carbonate, sodium bicarbonate, ammonium bicarbonate and ammonium carbonate; the component B is alkylphenoxy polyoxyethylenepolyoxypropylene; the component C is an alkyl imidazole ionic liquid and / or a quaternary ammonium salt ionic liquid. The invention further provides a preparation method of the heavy oil viscosity reducer. The method comprises: mixing and stirring the component A, the component B, the component C and the water. By adopting the heavy oil viscosity reducer, the viscosity of heavy oil can be lowered remarkably; meanwhile, irreversible modification and viscosity reduction can be performed on the thick oil to transform a heavy component of the thick oil to a light component, so that the thick oil recovery efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of heavy oil exploitation, and more specifically relates to a heavy oil viscosity reducer and a preparation method thereof. Background technique [0002] Heavy oil is a complex multi-component homogeneous organic mixture with high colloid and asphaltene content, low light component content, low straight-chain hydrocarbon content, high viscosity, and poor fluidity. Poor fluidity in surface transportation pipelines makes heavy oil production, gathering, transportation and processing difficult. [0003] At present, domestic and foreign heavy oil viscosity reduction technologies mainly include: thermal viscosity reduction, thin oil viscosity reduction, emulsification viscosity reduction, catalytic modification and ultrasonic viscosity reduction, etc. [0004] The emulsification viscosity reduction technology has the characteristics of strong operability in field implementation, flexible and diverse technologies...

AI Technical Summary

Problems solved by technology

However, the reaction temperature of hydrothermal catalytic cracking is generally between 200°C and 300°C, and the reaction is generally realized by injecting water vapor and catalyst into the oil layer; the reaction conditions are relatively harsh and the reaction temperature is high. Serious impact on heavy oil recovery

In addition, the viscosity reduction rate of modified heavy oil is much lower than that of emulsified viscosity reduction