A kind of preparation method of heavy oil viscosity reducer

Abstract

The invention discloses a preparation method of a novel viscosity reducer for thick oil. According to the preparation method, methyl methacrylate, styrene, acrylamide and maleic anhydride are taken asraw materials, and the viscosity reducer for the thick oil is prepared by using aqueous solution polymerization and physical compounding methods; the viscosity reducer for the thick oil is prepared from the following raw materials in parts by weight: 30-50 parts of methyl methacrylate, 9-15 parts of styrene, 5-11 parts of acrylamide and 3-5 parts of maleic anhydride. According to the method, an oil-soluble polymer is obtained by using an initiator to initiate a polymerization reaction of monomers; after a small amount of the product is added into crude oil, the viscosity of the crude oil canbe effectively reduced, and the recovery rate of the thick oil is increased; therefore, the novel viscosity reducer is suitable for development and utilization in oilfields with thick oil.

Description

technical field [0001] The invention relates to the field of preparation of oilfield chemical additives, in particular to a preparation method of a novel heavy oil viscosity reducer. Background technique [0002] With the continuous decline of recoverable volume and output of conventional crude oil, its exploitation can no longer meet people's demand for resources, and the exploitation of heavy oil has received extensive attention at home and abroad. The composition of heavy oil is relatively complex, containing a large amount of macromolecular organic matter such as wax, colloid, asphaltene, and a small amount of heavy metals, making its density and viscosity much higher than that of light crude oil. It has poor fluidity at room temperature and is extremely difficult to mine and transport. , the industrial cost is expensive. Therefore, reducing the viscosity of heavy oil and enhancing the fluidity of heavy oil has become a hot and difficult issue in the research of oilfiel...

AI Technical Summary

Problems solved by technology

The physical viscosity reduction method has the disadvantages of large fixed investment, high energy consumption, and short effective period of viscosity reduction.

The chemical viscosity reduction method has poor temperature resistance and salt resistance, and the heavy oil produced is difficult to demulsify and dehydrate, and the processing capacity is large, which is greatly restricted in application.

Ordinary polypropylene amine polymers have low surface activity, poor affinity between molecules and heavy oil, and poor emulsification and viscosity reduction effects.

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