High-temperature acidizing corrosion inhibitor as well as preparation method and application thereof

A technology for acidizing corrosion inhibitors and corrosion inhibitors, which can be used in chemical instruments and methods, earth-moving drilling and production, wellbore/well components, etc. Excellent corrosion performance, extended service life, and no pollutant emissions.

Inactive Publication Date: 2018-05-04
唐山市金沙工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the corrosion caused by the acidizing process of oil and gas wells in the prior art, high-temperature acidizing corrosion inhibitors have problems such as easy coking, delamination, insufficient stability of dissolution and dispersion, and formation damage at high temperatures. The first purpose of the present invention is to provide a It is mainly used to avoid corrosion, has good solubility with acid, is more economical and environmentally friendly, and is a special high-temperature acidification corrosion inhibitor. The second purpose is to provide a method for preparing a high-temperature acidification corrosion inhibitor with simple methods and scientific preparation links. The third purpose is to provide a kind of application method of high temperature acidification corrosion inhibitor

Method used

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  • High-temperature acidizing corrosion inhibitor as well as preparation method and application thereof

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Embodiment 1

[0039] Example 1: methanol 50, acetone 20, paraformaldehyde 13, heteroaniline 12, hydrochloric acid 5, compounding agent propynyl alcohol 12.

Embodiment 2

[0040] Example 2. Ethanol 55, aliphatic ketone 15, benzaldehyde 10, cyclohexylamine 5, oleic acid 5, compounding agent propynyl alcohol 10.

[0041] two. Preparation method embodiment of high temperature acidification corrosion inhibitor

[0042] It is divided into two parts: the preparation of the parent corrosion inhibitor and the preparation of the finished corrosion inhibitor. Synthesize the matrix corrosion inhibitor first, and then compound to obtain the finished high-temperature acidification corrosion inhibitor. The operation is as follows:

[0043] Example 1

[0044] 1. Preparation of parent corrosion inhibitor:

[0045] step one:

[0046] According to the parts by weight, take 50 parts of methanol, 20 parts of acetone, 13 parts of paraformaldehyde, 12 parts of aniline, and 5 parts of hydrochloric acid into the reaction kettle in turn, react at 95°C for 5-7 hours, and keep warm for 4 hours to obtain the matrix Corrosion inhibitor.

[0047] 2. Preparation of fini...

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Abstract

The invention relates to a high-temperature acidizing corrosion inhibitor as well as a preparation method and application thereof. The high-temperature acidizing corrosion inhibitor contains the following raw material components in parts by weight: 30-55 parts of methanol, 15-20 parts of acetone, 10-15 parts of formaldehyde, 5-14 parts of heterocyclic amine, 5-10 parts of hydrochloric acid and 10-15 parts of a compounding agent propargyl alcohol. The preparation method for preparing the high-temperature acidizing corrosion inhibitor by virtue of a reaction kettle comprises the steps of preparing a parent corrosion inhibitor, a preparing a finished corrosion inhibitor, and detecting the finished corrosion inhibitor. The corrosion inhibitor is suitable for being used in well fracturing acidizing processes of 15%-20% hydrochloric acid and mud acid at 90-140 DEG C. A synthetic method is simple, no pollutant is discharged, the corrosion inhibitor is used in the well fracturing acidizing processes of hydrochloric acid and mud acid and has the advantages of good solubleness, low dosage and excellent corrosion inhibition performance; and an equipment pipeline is not obviously corroded, sothat the service life of equipment is prolonged.

Description

technical field [0001] The invention relates to a corrosion inhibitor, in particular to a high-temperature acidification corrosion inhibitor used in the oil well acidification process, a preparation method of the high-temperature acidification corrosion inhibitor and an application of the high-temperature acidification corrosion inhibitor. Background technique [0002] Acidizing is a measure to enhance oil recovery and an effective technical measure to increase production of oil and gas wells and increase injection of water injection wells. Its principle is to recover or improve the permeability of formation pores and fractures through the dissolution and dissolution of acid liquid on rock cement or formation pores and blockages in fractures. During the production of oil and gas wells, it is often necessary to enhance the recovery by acidizing. However, during acidizing construction, the corrosion of metal by acid liquid will not only damage surface equipment and downhole p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74C09K8/54
CPCC09K8/54C09K8/74
Inventor 张会红马怡琳裴红莲许冰川霍彩霞
Owner 唐山市金沙工贸有限公司
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