A kind of surfactant and its preparation and application

Abstract

The invention relates to a surfactant and a preparation and an application thereof; The surfactant is obtained by copolymerization of a monomer (A) and a monomer (B); the monomer (A) is one or more than one unsaturated monomer with strong lipophilic groups, and has a general formula as shown in the following formula (1), wherein R, R1 and R2 are same or different, and represent H or C1-C12 alkyl; the monomer (B) is one or more than one unsaturated monomer with week hydrophilic groups, and has a general formula as shown in the following formula (2), wherein R3 represents H or C1-C4 alkyl; A represents COOM, OM, or SO3M, and M represents H, Na+, K+, C1-C8 alkyl, C1-C8 alkyl ether, or C1-C8 alkyl ester; the content of the monomer (A) is 10-90% of the total weight of the monomer (A) and the monomer (B); the content of the monomer (B) is 10-90% of the total weight of the monomer (A) and the monomer (B); the surfactant is applicable to the exploitation, gathering and transportation of heavy oil with viscosity more than 2000 mPa.S.

Description

technical field The invention relates to a macromolecule surfactant used for dispersing heavy oil particles in water, preventing the aggregation of heavy oil particles, reducing the viscosity of heavy oil and improving the flow ability of heavy oil, and its preparation and application. Background technique Conventional crude oil only accounts for about 30% of the world's oil and gas resources, heavy oil and super heavy oil resources account for about 70% of the world's oil and gas resources, and my country's onshore heavy oil and asphalt resources also account for more than 20% of the total oil resources. Since heavy oil and super-heavy oil generally have the characteristics of "three highs" (high viscosity, high density, and high colloidal asphaltene content), the production, gathering and transportation of super-heavy oil are facing huge difficulties. Since heavy oil was exploited in the 1960s, heavy oil thermal recovery technology (heating method) with steam huff and puff...

AI Technical Summary

Problems solved by technology

Although the emulsification and viscosity reduction of heavy oil by these technologies has certain effects, it is well known that the technology of emulsification and viscosity reduction of heavy oil has not been applied on a large scale. 2) Emulsification and viscosity reduction requires strong stirring to form a stable O / W emulsion, which is difficult to achieve underground; (3) The emulsification and viscosity reduction system is strongly alkaline, and has higher requirements for equipment and pipelines; (4) Emulsification of heavy oil demulsification Dehydration is very difficult, and sewage treatment is difficult. (5) Emulsified viscosity reducer has strong selectivity to heavy oil, and the application effect varies greatly; (6) Emulsified viscosity reducer that can be used in high temperature and high salinity reservoir conditions does not Many, and the production cost is high