Corrosion-release scale-proof wax-removal viscosity-reducing agent and preparation method thereof

Abstract

A viscosity reducer with corrosion-inhibiting, scale-inhibiting and wax-cleaning functions consists of 2-alkyl-1-hydroxyethyl-3-hydroxypropyl-imidazoline sodium phosphate 5-10 wt%, lauryl dimethyl benzyl ammonium chloride 10-15 wt%, FC-NO1 fluorocarbon surface activator 0.05-0.2 wt%, alkylphenol ethoxylates(14) 3-8 wt%, methanal 3-7 wt%, hexamine 8-15 wt%, hexa-sodium metaphosphate 5-8 wt%, hydroxy-ethyl-crossing di-phosphoric acid 5-8 wt% and water residues. It has excellent coordination and corrosion protection and can be used in oil filed and oil well.

Description

technical field

[0001] The invention relates to the technical field of oilfield chemistry, in particular to an oil well corrosion inhibition, scale, wax, and viscosity reducing agent, which is applied to oil wells for corrosion, scale, wax, and viscosity reduction. Background technique

[0002] After the oilfield development enters the medium-high water cut period, due to long-term immersion in corrosive well fluid, the oil well casing is corroded, and the inner wall of the casing is seriously scaled. To maintain oil production for a long time, chemical agents must be used to reduce the corrosion rate and reduce or remove scale. In addition, in the late stage of oilfield development, oil wells need to use chemical agents to remove wax and reduce viscosity to increase production capacity. However, the compatibility of the two agents for corrosion and scale removal and wax removal and viscosity reduction is poor, and it is not conducive to the use of the agents in the same we...