Salt- and temperature-resistant emulsification viscosity reducer for heavy oil

Abstract

The invention relates to a salt- and temperature-resistant emulsification viscosity reducer for thick oil. The emulsification viscosity reducer is applied in oil fields for emulsification viscosity reduction of heavy oil and super heavy oil and is characterized by comprising the following components by mass: 1 to 5 parts of sulfonate anionic surfactant, 0.2 to 1 part of disodium monolauryl sulfosuccinate, 0.2 to 1 part of polyoxyethylene nonylphenyl ether disodium monoester sulfosuccinate, 0.7 to 2 parts of polyoxyethylene ether ester salt, 1 to 3 parts of polyoxyethylene nonylphenyl-polyoxypropylene alcohol ether block copolymer, 0.5 to 1 part of carboxymethyl polyoxyethylene ether, 0.5 to 1 part of organic amide polyoxyethylene ether, 0.7 to 2 parts of polyoxyethylene polyoxypropylene polyethylene polyamine, 0.5 to 1 part of sulfonate polyacrylamide, 0.1 to 0.7 part of nonionic fluorocarbon surfactant, 0.2 to 0.5 part of a modification nanometer auxiliary agent, 0.3 to 1 part of an alkalescence auxiliary agent and 10 to 200 parts of water. The beneficial effects of the emulsification viscosity reducer are as follows: salt resistance is up to 24*10<4> mg / L, resistance to a temperature as high as 150 DEG C is realized, and emulsification viscosity reduction of super heavy oil with a viscosity of 500 Pa.s at a temperature of 50 DEG C is realized.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oilfields, in particular to a viscosity-reducing treatment agent for crude oil, which is a salt-resistant and temperature-resistant super-heavy oil emulsification viscosity-reducer. Background technique [0002] Heavy oil is an important part of the world's petroleum resources. my country is rich in heavy oil reserves. The proven oil reserves are about 5 billion tons, of which 1.4 billion tons are heavy oil, accounting for nearly 30% of the total oil reserves. It is the fourth largest in the world after the United States, Canada and Venezuela. heavy oil producing countries. With the deepening of oil resources development and the reduction of world oil reserves, the exploitation and utilization technology of heavy oil has been paid more and more attention. [0003] The content of light components in heavy oil is low, the content of asphaltenes and colloids is high, and the content of strai...

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Problems solved by technology

[0003] The content of light components in heavy oil is low, the content of asphaltenes and colloids is high, and the content of straight chain hydrocarbons is low, resulting in most heavy oils having high viscosity and high density characteristics, so pumping units are prone to occur during heavy oil production. Problems such as large load, large power consumption, frequent mechanical accidents, and high back pressure of surface pipelines have brought great difficulties to the safe production of heavy oil wells. In order to ensure the safe production of heavy oil wells, it is an important task to study the production technology Urgent tasks

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