Novel crude oil drag reduction and viscosity reducing agent

Abstract

The invention provides a formula used for oil field heavy oil exploitation and crude oil transportation, which can reduce the viscosity of crude oil and at the same time reduce the adhesion of crude oil on the pipe wall and formation surface. It contains carboxylated polyether, sodium carbonate, sodium alkylsulfonate and PF-C. The carboxylated polyether includes an organic initiator with active hydrogen to initiate the generation of polyoxypropylene polyoxyethylene ether block copolymer; or an organic initiator with active hydrogen to initiate the addition of copolymerized polyethylene oxide to generate polyoxyethylene vinyl ether. After adding a certain amount of the drag and viscosity reducing agent in oil wells or in crude oil pipelines, not only can the viscosity of crude oil be greatly reduced. And the adhesive force on the negative interface (including steel pipe, cement, silicate, etc.) becomes smaller, so that the resistance of crude oil in the process of exploitation and transportation is greatly reduced, and it is non-toxic, harmless and easy to use.

Description

Technical field:

[0001] The invention relates to a novel crude oil drag reduction and viscosity reduction agent used for the exploitation and transportation of heavy oil in oil fields. Background technique:

[0002] More than 60% of crude oil in my country is heavy oil containing gums and asphaltenes. In the process of crude oil extraction and pipeline transportation, due to the high viscosity of crude oil, especially when the crude oil contains a certain amount of water, the crude oil will change as the crude oil flows. It becomes thicker and thicker, which is also the phenomenon of shear thickening of heavy oil containing a certain amount of water. Because of the high viscosity of crude oil, it strongly adsorbs on the formation and the pipe wall during the flow process, which not only increases the production resistance, but also seriously affects the oil recovery rate. Therefore, with the rapid growth of my country's national economy and the increase in oil demand, higher requ...