High-temperature acidizing corrosion inhibitor based on tribenzyl-(2-benzyl) pyridyl ammonium chloride

Abstract

The invention discloses a high-temperature acidizing corrosion inhibitor based on tribenzyl-(2-benzyl) pyridyl ammonium chloride. The high-temperature acidizing corrosion inhibitor comprises the following components in parts by weight: 20-30 parts of corrosion-inhibitor main agent, 2.0-3.0 parts of synergist, 0.5 part of dispersing agent, 0.5-1.0 part of propargyl alcohol, 2.5-9.0 parts of triethanolamine, 0.5-1.0 part of a surface active agent and 65-70 parts of a solvent, wherein the corrosion-inhibitor main agent is the tribenzyl-(2-benzyl) pyridyl ammonium chloride, and the synergist is a mixture of potassium iodide, antimony trioxide and antimony trichloride with the weight ratio of (2-3) to (1-2) to (1-2); the high-temperature acidizing corrosion inhibitor meets the requirements of acidizing construction in an oil field under the condition of 120-160 DEG C and provides a corrosion-inhibitor formula with stable properties, good corrosion inhibiting property, easiness in site construction and cost advantage. The high-temperature acidizing corrosion inhibitor disclosed by the invention has the characteristics of good compatibility with common acidizing additive on site as well as common imidazoline corrosion inhibitors and other types of quaternary ammonium salt corrosion inhibitors, mixing for use, convenience in construction, transportation and storage, strong safety, no pollution and low cost and the like.

Description

technical field [0001] The invention relates to the technical field of oil field acidizing construction operations, in particular to a high-temperature acidizing corrosion inhibitor based on tribenzyl-(2-benzyl)pyridyl ammonium chloride. Background technique [0002] In the acidizing of oil and gas wells, especially in high-temperature deep and ultra-deep wells with concentrated hydrochloric acid or a large amount of acid acidizing, the primary task is to solve the corrosion problem of high-temperature acidizing fluid on oil well casing equipment. In the pickling process, especially the pickling solution prepared with inorganic acid, it will cause a certain degree of corrosion and damage to metal equipment and materials. [0003] With the development of drilling technology and the progress of oil recovery technology, a large number of deep wells and ultra-deep wells have been put into development, and the number of acidizing measures has increased year by year, and higher re...

AI Technical Summary

Problems solved by technology

[0004] In recent years, although there are many studies on oil well acidification corrosion inhibitors, there are few acidification corrosion inhibitors suitable for high temperature, and the performance is not stable enough.

Some high-temperature acidification corrosion inhibitors have the disadvantages of easy coking, delamination, poor dissolution and dispersion, and insufficient stability at high temperatures, which may cause further damage to the formation

It is difficult to achieve the desired effect with a single component or a single agent in a high temperature and high pressure environment, so it is necessary to study the compounding of organic corrosion inhibitors and metal complexes to exert a synergistic effect, and develop a better performance, economical and practical composite acidification corrosion inhibitor agent in order to achieve the purpose of high performance and multi-function

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