A kind of composite type oilfield corrosion inhibitor and preparation method thereof

Abstract

The invention relates to the field of oil field water treatment, in particular to compounded oil field corrosion inhibitor and a preparation method thereof. The compounded oil field corrosion inhibitor comprises liquid A and liquid B, wherein the volume ratio of the liquid A to the liquid B is 1: 3; the liquid A comprises, by weight percent, 5%-15% of aromatic ketone mannich base, 3%-10% of fattyalcohol-polyoxyethylene ether, 0.5%-3% of fatty alcohol-polyoxyethylene ether phosphate, 5%-15% of ethyl alcohol, 2%-10% of propargyl alcohol, 15%-35% of hydrochloric acid, 3%-10% of potassium iodideand the balance water; and the liquid B comprises, by weight percent, 5%-15% of oleic acid imidazoline, 5%-10% of fatty alcohol-polyoxyethylene ether, 2%-7% of fatty alcohol-polyoxyethylene ether phosphate, 4%-13% of ethyl alcohol, 2%-8% of formic acid and the balance water. The compounded oil field corrosion inhibitor is suitable for working conditions of an underground oil and water pipeline andeasy and convenient to use and is conveniently applied and popularized on a large scale.

Description

technical field [0001] The invention relates to the field of oilfield water treatment, in particular to a compound oilfield corrosion inhibitor and a preparation method thereof. Background technique [0002] The petrochemical industry is the basis for the development of a country's national economy. With the development of the oil recovery stage, most of the oil fields in my country have entered the tertiary oil recovery stage. mining. The oil displacement agent and the produced high-quality crude oil need to be transported through oil-water pipelines, but the pipelines used to transport oil and water are mostly made of metal materials, and the underground environment is relatively harsh, which is prone to chemical corrosion. , seriously affecting the normal production of oil fields. Due to the harsh underground operating environment, oil and water pipelines are often in the environment of high temperature, high salt and low pH value, and the corrosion problem is relatively...

AI Technical Summary

Problems solved by technology

Because traditional corrosion inhibitors are sensitive to environmental changes, harsh environments such as high temperature, high salt, and low pH value will change the composition of ordinary corrosion inhibitors, resulting in the failure of corrosion inhibitors, which cannot slow down the corrosion of oil-water pipelines or even aggravate corrosion.

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