Cold water fat-soluble dissolving nano oil-displacing agent for heavy oil injection and its preparation method and application

Abstract

The invention discloses a fat-soluble dissolving nano-oil-displacing agent HCD for heavy oil injection cold water, which comprises the following components by weight percentage: 10-50% of ester compounds, 5-30% of alcohol compounds, amine compounds or ethers Compounds 0-20%, sodium or ammonium salts 0-35%, wetting agents 0-20%, aldehydes 0-20%, biosurfactants 0-20% and acidic substances 0-20%; and HCD The preparation method and its application in oil field exploitation and pipeline oil fast transportation. The HCD prepared by the method is characterized by strong fat solubility, water solubility, viscosity reduction, throat expansion through slits, weak oil wetness, low tension, high oil displacement efficiency, safety and environmental protection, entering into the nano-gap of heavy oil, nonpolar fat solubility It dissolves paraffin, asphalt and colloid, sharply reduces viscosity, makes heavy oil thin and easy to produce and easy to transport in pipelines, and realizes low-cost and high-efficiency large-scale industrial production of naphthenic heavy oil, ultra-heavy oil and other heavy oil.

Description

technical field

[0001] The invention relates to the technical field of underground energy exploitation, in particular to a heavy oil flooding cold water fat-soluble dissolving nano oil displacement agent and a preparation method thereof, and the use of the nano oil displacement agent for heavy oil exploitation and pipeline oil rapid oil transportation Methods. Background technique

[0002] The distribution of heavy oil reservoirs is very wide. The potential reserves of heavy oil (including bitumen) in the world may be about 6 times that of the proven conventional crude oil reserves. 8 t, my country's heavy oil resources are also quite rich and widely distributed. Among them, naphthenic heavy oil is a scarce resource, and its reserves only account for 2.2% of the world's proven oil reserves. It is a "rare metal" material used in aerospace and space satellites. It has the characteristics of high value, high density, high viscosity, high colloid, high residual carbon content ...

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