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High temperature resistant corrosion inhibitor and preparation method thereof

A corrosion inhibitor and high temperature resistant technology, which is applied in the field of high temperature resistant corrosion inhibitor and its preparation, can solve the problems of oil casing corrosion, high oil layer temperature, and unsatisfactory corrosion inhibition effect of corrosion inhibitor, so as to prevent equipment corrosion , good corrosion inhibition effect

Active Publication Date: 2015-05-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention is aimed at deep wells (above 3,500 meters) in Liaohe Oilfield, where the reservoir temperature is high (>120°C). When acidizing and unblocking is performed, the equipment such as oil casing is severely corrosive, and the corrosion inhibition effect of commonly used corrosion inhibitors in the field is not ideal, etc. Problem, research and development of a high-temperature resistant corrosion inhibitor, the purpose is to prevent corrosion of oil casing and other equipment during acidification and plugging removal of high-temperature oil layers

Method used

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  • High temperature resistant corrosion inhibitor and preparation method thereof
  • High temperature resistant corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Example 1 (reservoir temperature is lower than 100°C):

[0100] Synthesis of 2 party high temperature corrosion inhibitor solution embodiment:

[0101] About drug ratio:

[0102] Initial drug A:B:C=0.75:1.75:0.75

[0103] 1. Weigh 300 kg, 700 kg, and 300 kg of initial drug A, B, and C solutions respectively;

[0104] 2. Under the condition of stirring (60 rpm), add 300 kg of initial drug A into the 2-square reactor, and stir evenly (60 rpm) for 30 minutes;

[0105] 3. Add 700 kg of the weighed initial drug B into the above reaction kettle, and stir evenly (60 rpm) for 45 minutes;

[0106] 4. Add the weighed 300 kg of initial drug C into the above reaction kettle, stir evenly (60 rpm) for 30 minutes, then raise the temperature of the reaction kettle to 150°C, mix for 45 minutes under uniform stirring, and then cool to room temperature;

[0107] 5. Add 700 kg of tap water, raise the temperature of the reactor to 85°C, mix for 45 minutes with uniform stirring, and then...

Embodiment 2

[0108] Example 2 (reservoir temperature 100-125°C):

[0109] Synthesis of 2 party high temperature corrosion inhibitor solution embodiment:

[0110] About drug ratio:

[0111] Initial drug A:B:C=1:2:1

[0112] 1. Weigh 400 kg, 800 kg, and 400 kg of initial drug A, B, and C solutions respectively;

[0113] 2. Under the condition of stirring (60 rpm), add 400 kg of the weighed initial drug A into the 2-square reaction kettle, and stir evenly (60 rpm) for 30 minutes;

[0114] 3. Add 800 kg of the weighed initial drug B into the above reaction kettle, and stir evenly (60 rpm) for 45 minutes;

[0115] 4. Add 400 kg of the weighed initial drug C into the above reactor, stir evenly (60 rpm) for 30 minutes, then raise the temperature of the reactor to 150°C, mix for 45 minutes under uniform stirring, and then cool to room temperature;

[0116] 5. Add 400 kg of tap water, raise the temperature of the reactor to 85°C, mix for 45 minutes with uniform stirring, and then cool to room t...

Embodiment 3

[0117] Example 3 (reservoir temperature 125-160°C):

[0118] Synthesis of 2 party high temperature corrosion inhibitor solution embodiment:

[0119] About drug ratio:

[0120] Initial drug A:B:C=1.25:2.15:1.25

[0121] 1. Weigh 500 kg, 860 kg, and 500 catties of initial drug A, B, and C solutions respectively;

[0122] 2. Under the condition of stirring (60 rpm), add 500 kg of initial drug A into the 2-square reactor, and stir evenly (60 rpm) for 30 minutes;

[0123] 3. Add 860 kg of the weighed initial drug B into the above reaction kettle, and stir evenly (60 rpm) for 45 minutes;

[0124] 4. Add 500 kg of the weighed initial drug C into the above reaction kettle, stir evenly (60 rpm) for 30 minutes, then raise the temperature of the reaction kettle to 150°C, mix for 45 minutes under uniform stirring, and then cool to room temperature;

[0125] 5. Add 140 kg of tap water, raise the temperature of the reactor to 85°C, mix for 45 minutes under uniform stirring, and then coo...

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Abstract

The present invention relates to a high temperature resistant corrosion inhibitor and a preparation method thereof. The preparation method comprises: taking dodecyl dimethyl tertiary amine and polyethylene polyamine, mixing, stirring, and diluting to prepare an agent A, wherein a weight ratio of the dodecyl dimethyl tertiary amine to the polyethylene polyamine is 1:1.5-2.5; taking polyethylene polyamine and morpholine, mixing, stirring, and diluting with water to prepare an agent B, wherein a weight ratio of the polyethylene polyamine to the morpholine is 1.5-2.5:1; taking pyridine and morpholine, mixing, stirring, diluting with water, and uniformly stirring to prepare an agent C, wherein a weight ratio of the pyridine to the morpholine is 1:1.25-1.75; and under a stirring condition, sequentially adding the agent A, the agent B and the agent C to a reaction container, mixing, diluting with water, and uniformly stirring to prepare the high temperature resistant corrosion inhibitor, wherein a weight ratio of the agent A to the agent B to the agent C is 0.75-1.25:1.75-2.15:0.75-1.25.

Description

technical field [0001] The invention relates to a high temperature resistant corrosion inhibitor and a preparation method thereof. Background technique [0002] In the process of acidizing oil and water wells, no matter what kind of acid is used, it will cause different degrees of corrosion to oil pipes, water pipes and injection pumps. In 2008, Liaohe Oilfield implemented acidizing operations in high-temperature (>120°C) deep wells (>3500m), and there was an urgent need to develop high-temperature-resistant, high-efficiency, low-toxicity, and non-polluting corrosion inhibitors. Otherwise, it will cause serious damage to the equipment, shorten the service life, and even cause accidents, resulting in serious damage to the oil layer. So the application of corrosion inhibitor has become one of the key issues in acidizing construction. [0003] There are many types of corrosion inhibitors and they come from a wide range of sources. From the chemical composition, it can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74
CPCC09K8/54C09K8/74
Inventor 张玉涛张洪君郑猛王德伟刘广友韩松郭言柱张雯酌刘晓妍张敏袁爱武段效威赵鹏汪海林张群刘晶晶刘丽华柳燕丽朱斌王睿孙强苏野
Owner PETROCHINA CO LTD