Thick oil emulsifying viscosity breaker for tracing steam, and preparation method and application method thereof

Abstract

The invention discloses a thick oil emulsifying viscosity breaker for tracing steam, and a preparation method and application method thereof. The viscosity breaker comprises the following components in parts by weight: 75-80 parts of sodium fatty amine polyethenoxy ether carboxylate, 10-15 parts of alkaline assistant and 1-5 parts of small molecule alcohol. The molecular formula of the sodium fatty amine polyethenoxy ether carboxylate is disclosed as Formula (1), wherein n is any whole number ranging from 12 to 18, x is any whole number ranging from 2 to 5, and y is any whole number ranging from 2 to 5. The thick oil emulsifying viscosity breaker for tracing steam is compounded from the main agent sodium fatty amine polyethenoxy ether carboxylate, the synergist alkaline assistant and the penetrant small molecule alcohol with water. The obtained viscosity breaker has high temperature resistance and salt resistance, can quickly emulsify the thick oil with higher colloid asphalt content, has the advantages of favorable viscosity breaking effect and the like, and can be automatically demulsified. The thick oil emulsifying viscosity breaker for tracing steam satisfies the viscosity breaking requirements for high-temperature high-salinity high-colloid-asphalt super-thick oil, and is suitable for tracing steam injection in steam soak and steam displacement.

Description

technical field [0001] The invention belongs to the technical field of viscosity reducer for petroleum development, and in particular relates to a heavy oil emulsification viscosity reducer with steam, and at the same time relates to a preparation method and a use method of a heavy oil emulsification viscosity reducer with steam. Background technique [0002] Heavy oil refers to crude oil with a viscosity greater than 100mPa·s at the reservoir temperature. Heavy oil has high viscosity, high flow resistance, and is difficult to exploit; however, the reserves of heavy oil in some countries are relatively large, and if the technical problems of difficult exploitation are not solved, great economic losses will be caused. To solve the problem of heavy oil production, the first thing to consider is how to reduce the freezing point and viscosity of heavy oil. [0003] Super heavy oil refers to crude oil with a viscosity greater than 50,000 mPa·s, which has special characteristics ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a heavy oil emulsified viscosity reducer with steam, which not only has good temperature resistance and salt resistance, but also has strong penetration ability, so as to solve the problem of the existing viscosity reducer in the formation of super heavy oil reservoirs. In the case of high water salinity and high content of heavy components in super-heavy oil, its viscosity-reducing effect cannot be fully exerted

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