Method for preparing heavy oil viscosity reduction agent through hydrophobic modification carbon nanometer pipe

Abstract

The invention discloses a method for preparing a heavy oil viscosity reduction agent through a hydrophobic modification carbon nanometer pipe. The method belongs to the technical field of heavy oil viscosity reduction agent preparation and comprises the steps of using a coupling agent for carrying out surface treatment on the carbon nanometer pipe; then adopting methyl methacrylate, octadecyl acrylate and styrene as raw materials for preparing to obtain an encapsulated liquid; coating the surface of the carbon nanometer pipe with the encapsulated liquid, and drying to obtain the hydrophobic modification carbon nanometer pipe; finally mixing the hydrophobic modification carbon nanometer pipe, a surface active agent and solvent oil to obtain the heavy oil viscosity reduction agent. When the heavy oil viscosity reduction agent prepared through the hydrophobic modification carbon nanometer pipe is added into the heavy oil, a polar basal body can be introduced, so that hydrogen-bond interaction between colloid and asphaltene in the heavy oil can be reduced, the aims of reducing the heavy oil viscosity and improving the crude oil mobility can be achieved, the usable range is wide, a better viscosity reduction effect can be realized on different oil products, and a viscosity reduction effect is durable and effective.

Description

technical field [0001] The invention discloses a method for preparing a heavy oil viscosity reducer by hydrophobically modified carbon nanotubes, and belongs to the technical field of heavy oil viscosity reducer preparation. Background technique [0002] Heavy oil is mainly composed of hydrocarbons (alkanes, cycloalkanes, aromatics), colloids and asphaltenes. Among them, the higher the content of light hydrocarbons, the higher the quality of crude oil and the better its fluidity. The mixture of normal alkanes with carbon numbers ranging from C18 to C30 is called paraffin. Paraffin is solid at room temperature, and the content of paraffin directly determines the freezing point of heavy oil. Gum is a condensed ring compound with long side chains in crude oil. It has a complex structure formed by polyalkane aromatic nuclei and naphthenic aromatic nuclei containing heteroatoms such as O, S, N, etc., with polar groups. It is brown and viscous. Viscous, poor fluidity; there is no...

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Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the problem that the current heavy oil has high viscosity and poor rheology, and the chemical viscosity reducer used is an oil-soluble viscosity reducer, which has poor viscosity reduction effect and strong selectivity, a hydrophobic modified A method for preparing viscous oil viscosity reducer from carbon nanotubes. In the present invention, carbon nanotubes are surface-treated with a coupling agent, and then methyl methacrylate, stearyl acrylate and styrene are used as raw materials to prepare coated liquid, the coating liquid is coated on the surface of carbon nanotubes and dried to obtain hydrophobically modified carbon nanotubes, and finally mixed with surfactant and solvent oil to prepare thick oil viscosity reducer, hydrophobic modified carbon nanotubes of the present invention Adding the prepared viscosity reducer to heavy oil can introduce polar matrix, which can reduce the hydrogen bond between colloid and asphaltene in heavy oil, so as to reduce the viscosity of heavy oil and improve the fluidity of crude oil. The scope of application Wide range, good viscosity reduction effect on different oil products, and the viscosity reduction effect is long-lasting and effective