Preparation of nano composite material high-wax-content heavy oil viscosity reducer and performance testing

Abstract

The invention discloses a nano composite material high-wax-content heavy oil viscosity reducer and a preparation method thereof and belongs to the technical field of nano composite material preparation and application. The viscosity reducer is a nano polymethylacrylic acid high carbon alcohol-acrylamide composite material. The preparation method of the viscosity reducer comprises the steps that surface pre-modification is conducted on synthesized MSN by using a silane coupling agent, and polymethylacrylic acid high carbon alcohol-acrylamide composite material powder is obtained through graft copolymerization of methylacrylic acid high carbon alcohol-acrylamide on the surface and pore channels of the MSN. The nano viscosity reducer has a good viscosity reduction effect, is low in cost, simple in production and clean and free of pollution in the process. An experiment proves that the viscosity reduction rate of the nano composite material high-wax-content heavy oil viscosity reducer is 70.30% Daqing Linyuan Sanku high-wax-content heavy oil at the temperature of 40 DEG C and is 79.37% for Daqing Dandong station high-wax-content heavy oil at the temperature of 40 DEG C. The steps are simple, the operation is convenient, and the practicability is strong.

Description

technical field [0001] The invention belongs to the field of MSN composite material preparation technology and application, in particular to the preparation and performance test of a nano-material high-wax thick oil viscosity reducer. Background technique [0002] The world's heavy oil resources are extremely rich, and its geological reserves far exceed conventional crude oil. my country has discovered more than 70 heavy oil fields in 12 basins, and its resources account for about 25% to 30% of the total oil resources. With the less and less recoverable light crude oil and the continuous improvement of extraction technology, the exploitation of heavy oil resources has attracted more and more attention from all over the world. However, high density, high freezing point, high viscosity, and difficult flow are the outstanding characteristics of my country's heavy oil resources. Therefore, reducing the viscosity of heavy oil and improving its fluidity is the key to solve the p...

AI Technical Summary

Problems solved by technology

However, for high-wax crude oil, technologies such as heating viscosity reduction technology, thin oil blending viscosity reduction technology, hydrothermal catalytic cracking viscosity reduction technology, emulsification viscosity reduction method, oil-soluble viscosity reduction agent and other technologies are generally used at present, but the above methods have shortcomings In addition, the heating viscosity reduction technology often has condensation pipe accidents and high energy consumption; the viscosity reduction technology mixed with thin oil, for crude oil with high wax content and high freezing point, has poor pour point and viscosity reduction effect, and is limited by thin oil resources. Restrictions; hydrothermal catalytic cracking viscosity reduction technology produces irreversible changes to heavy oil, and this technology requires heat-driven, catalyst selection is difficult, which limits its development; post-treatment of emulsification viscosity reduction method is cumbersome and complicated; oil-soluble viscosity reduction agent Low viscosity and strong selectivity

However, there is no report on the application of MSN composite materials in viscous reduction of heavy oil.

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