Corrosion inhibitor used for oil field water, preparation method and detection method

Abstract

A corrosion inhibitor used for oil field water, a preparation method and a detection method are provided. The corrosion inhibitor is composed of a main agent and a compounding agent, wherein the main agent is a Schiff base synthesized from aromatic aldehyde and ethylene diamine, and the compounding agent is urotropine, OP-10 (alkylphenol polyoxyethylene), potassium iodide, thiourea or sodium tungstate. The Schiff base formed by the aromatic aldehyde and the ethylene diamine are compounded with the urotropine, the OP-10 (alkylphenol polyoxyethylene), the potassium iodide, the thiourea or the sodium tungstate according to mass ratio to obtain the corrosion inhibitor. The required raw materials are simple and easy to obtain. The main agent is easy to prepare and can be used directly without purification. The preparation method is simple, convenient and safe, is short in reaction time, is low in cost and is high in yield. The corrosion inhibitor is excellent in corrosion inhibition and is suitable for industrial large-scale production. By means of the corrosion inhibitor for detection, a strong practicability is achieved. The corrosion inhibitor has an excellent slow-releasing performance in the field of oil exploitation.

Description

technical field [0001] The present invention relates to a kind of corrosion inhibitor for oil field, especially relates to the corrosion inhibitor for oil field water. [0002] Etching agent and preparation method and detection method. Background technique [0003] Metal corrosion pervades almost all walks of life. In the process of oil extraction, as the water content increases, the original "water in oil" state of the fluid in the crude oil pipeline is changed, which intensifies the corrosion of crude oil processing and transportation pipeline equipment. especially containing CO 2 、H 2 The successive emergence of S and high-salt component oil wells also makes the corrosion problem of oil wells more and more prominent. According to rough estimates, the loss caused by corrosion to my country's petroleum industry accounts for about 6% of the total output value of the industry, and appropriate measures are taken. Anti-corrosion measures can restore 30% to 40% of the loss. ...

AI Technical Summary

Problems solved by technology

For example, acetylene alcohol corrosion inhibitors have good corrosion inhibition effect, but they are expensive and highly toxic; the solubility of fatty amines and their derivatives, and rosin derivatives in acid solution is poor; the high temperature resistance of amide carboxylic acid corrosion inhibitors Poor; the cost of pyridine and quaternary ammonium salt corrosion inhibitors synthesized from pyridine, quinoline, etc. is relatively high. Although the thermal stability is good, the desorption is serious at high temperature, and the dosage needs to be increased.

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