Styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer as well as preparation method and application thereof

Abstract

The invention provides styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer which has a structure shown as a formula I. The copolymer disclosed by the invention has better compatibility with high-colloid asphalt, can be used as a high-colloid asphaltene heavy oil viscosity reducer, has effects of dispersing asphaltene and enhancing colloid stable asphaltene, can effectively reduce heavy oil viscosity and has higher viscosity reduction rate. In an application process, the copolymer can be directly added into heavy oil, has convenience in application and low cost and further has no effect on oil quality. Embodiment results show that the styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer disclosed by the invention can be utilized as the viscosity reducer to be applied into the heavy oil; when an adding amount is 0.4% of the mass of the heavy oil, the viscosity reduction rate at 50 DEG C can reach 76% or more.

Description

Technical field [0001] The invention relates to the technical field of viscosity reducers, in particular to a styrene-maleic anhydride alkylphenol polyoxyethylene ether copolymer and a preparation method and application thereof. Background technique [0002] In the heavy oil polydisperse colloid stabilization system, the asphaltenes can be stably suspended in the heavy oil, which mainly depends on the solvation and dispersion of the colloid. In the process of heavy oil production and transportation, as the temperature and pressure change, the heavy oil system Asphaltenes accumulate and precipitate each other and wrap the liquid crude oil, increasing the viscosity of the crude oil. High-colloid asphaltene heavy oil has outstanding characteristics such as high viscosity, high density and poor fluidity, which severely restrict its exploitation, pipeline transportation and industrial applications. [0003] For high colloidal asphaltene heavy oil, the traditional viscosity reduction te...

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Problems solved by technology

Among them, the thinner viscosity reduction technology is complex in process, greatly affected by thin oil resources, and will affect the oil products of thin oil; the heating viscosity reduction technology has problems such as large energy consumption and high application cost; the amount of water mixed in the emulsification viscosity reduction process is large, Severe environmental pollution and complicated post-processing of crude oil

[0004] The use of chemical additives to reduce the viscosity of heavy oil and improve its fluidity has attracted more and more attention from the petroleum industry. The dosage is generally 0.1wt% to 5wt% of heavy oil. This method is easy to operate and saves energy. It is considered the most promising method. Viscosity reduction method, but the viscosity reduction effect of the current chemical viscosity reducer is not good

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