Quinoline quaternary ammonium salt compound and its preparation method and application

Abstract

The invention relates to the field of water treatment agents, in particular to a quinoline quaternary ammonium salt compound and a preparation method and application thereof. The quinoline quaternaryammonium salt compound is a compound represented by a formula (1). The quinoline quaternary ammonium salt compound has good corrosion inhibition and bacteriostasis functions, and can have excellent corrosion inhibition performance and good bactericidal and bacteriostatic functions on an oilfield reinjection water system in high chlorine, high salt, high temperature and high pressure environments at a lower dosage.

Description

technical field [0001] The invention relates to the field of water treatment agents, in particular to quinoline quaternary ammonium salt compounds and their preparation methods and applications. Background technique [0002] At present, most of my country's oil fields have entered the middle and late stages of development, and water injection is generally used for oil recovery. In the case of serious shortage of water resources, the reinjection of oil production sewage not only solves the problem of water shortage, but also solves the problem of environmental pollution caused by the discharge of oil production sewage. However, oil extraction wastewater contains a large number of microorganisms, Ca 2+ , Mg 2+ , Cl - , SO 4 2- and other corrosive scaling ions, which can easily cause corrosion and scaling of facilities; oilfield sewage also contains a variety of microorganisms, among which sulfate reducing bacteria (SRB) are the main hazards, because the water quality cond...

AI Technical Summary

Problems solved by technology

However, oil extraction wastewater contains a large number of microorganisms, Ca 2+ , Mg 2+ , Cl - , SO 4 2- and other corrosive scaling ions, which can easily cause corrosion and scaling of facilities; oilfield sewage also contains a variety of microorganisms, among which sulfate reducing bacteria (SRB) are the main hazards, because the water quality conditions of oilfield wastewater are suitable for the growth of SRB, The reproduction of microorganisms increases the concentration of corrosive ions and accelerates the corrosion of water injection equipment. The corrosion products of microorganisms will also block the water injection pipeline, which not only makes the oil well pipeline and supporting facilities severely corroded and cannot operate normally, but also blocks the pores of the oil layer and reduces the permeability of the oil layer. , seriously affecting the production and exploitation of oilfields

[0003] At present, although there is a certain gap between domestic and foreign countries in the research on corrosion inhibitors for oilfield gathering and transportation systems, they have also researched and developed organic amines, organic ammonium salts, quaternary ammonium salts, phosphate esters, amides, imidazolines and other nitrogen- and phosphorus-containing corrosion inhibitors. , Sulfur corrosion inhibitor, fungicides generally use fungicide 1227 to inhibit the growth and reproduction of SRB, but due to the long-term use of fungicides, SRB in many oil fields have developed resistance to it, resulting in greatly increased water treatment costs

Images