Preparation method for novel heavy oil viscosity reducer

Abstract

The invention discloses a preparation method for a novel heavy oil viscosity reducer. The novel heavy oil viscosity reducer is prepared from, by weight, 30 to 50 parts of methyl methacrylate, 9 to 15parts of styrene, 5 to 11 parts of acrylamide and 3 to 5 parts of maleic anhydride through aqueous solution polymerization and physical compounding. According to the invention, an oil-soluble polymeris prepared by initiating the polymerization of monomers in virtue of an initiator; through addition of a small amount of the heavy oil viscosity reducer into crude oil, the viscosity of crude oil canbe effectively reduced, and the rate of heavy oil recovery is increased; and the heavy oil viscosity reducer is applicable to exploitation and development of heavy oilfields.

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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