Corrosion and scale inhibitor composition, application thereof, and oil field water injection wellbore corrosion and scale prevention method

The technology of a corrosion and scale inhibitor and a composition is applied in the field of corrosion and scale inhibition of oilfield water injection wellbore, which can solve the problems of aggravated corrosion, complex composition of corrosion inhibitor, microbial corrosion, etc., and achieves simple composition and excellent corrosion and scale inhibition effect. , the effect of reducing difficulty

Active Publication Date: 2016-07-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Although some corrosion inhibitors for oilfield water injection wellbore have been developed, the composition of existing corrosion inhibitors is complex, which increases the difficulty of on-site operation, and some components have obvious adverse effects on the environment; moreover, with the difficulty of crude oil production Larger use of steam flooding to increase oil recovery, higher and hi

Method used

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  • Corrosion and scale inhibitor composition, application thereof, and oil field water injection wellbore corrosion and scale prevention method
  • Corrosion and scale inhibitor composition, application thereof, and oil field water injection wellbore corrosion and scale prevention method
  • Corrosion and scale inhibitor composition, application thereof, and oil field water injection wellbore corrosion and scale prevention method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] The 2-methyl-5-polyoxyethylene-quinoline used in this example was prepared by the following method.

[0094] 19.2g 2-methyl-5-hydroxyquinoline (chemical reagent, TCI (Shanghai) Chemical Industry Development Co., Ltd.), catalyst (sodium hydroxide, 0.1 gram) joins in the reaction kettle, closes the reaction kettle, replaces with nitrogen Air in the kettle, stirred, and the temperature was raised to 120° C., and about 44 grams of ethylene oxide was slowly pressed in, and then the reaction was continued for two hours. After cooling down, the solvent was removed, and the obtained solid matter was 13 Analysis by C-NMR showed that the peak with a chemical shift of 67-72 was the formed ether bond, and it was confirmed that the obtained solid substance was 2-methyl-5-polyoxyethylene-quinoline.

[0095] The corrosion and scale inhibitor composition used and the addition amount of each component are:

[0096] 2-methyl-5-polyoxyethylene-quinoline 30mg / L,

[0097] Heptadecenyl im...

Embodiment 2

[0126] The 3-methyl-6-polyoxyethylene-quinoline used in this example was prepared by the following method.

[0127] 19.2g 3-methyl-6-hydroxyquinoline (chemical reagent, TCI (Shanghai) Chemical Industry Development Co., Ltd.), catalyst (sodium hydroxide, 0.1 gram) joins in the reactor, closes the reactor, replaces with nitrogen Air in the kettle, stirring, heating up to 120°C, slowly press in about 27 grams of ethylene oxide, and then continue the reaction for two hours. Cool down to get the product. NMR 13 The analysis results of C showed that the peaks with chemical shifts of 67-72 were the formed ether bonds.

[0128] The corrosion and scale inhibitor composition used and the addition amount of each component are:

[0129] 3-methyl-6-polyoxyethylene-quinoline 40mg / L

[0130] 1-aminoethyl-2-heptadecenyl imidazoline quaternary ammonium salt 10mg / L

[0131] Acrylic acid copolymer 3mg / L

[0132] 1-aminoethyl-2-heptadecenyl imidazoline quaternary ammonium salt has the follo...

Embodiment 3

[0138] The 4-methyl-7-polyoxyethylene-quinoline used in this example was prepared by the following method.

[0139] 19.2g 4-methyl-7-hydroxyquinoline (chemical reagent, TCI (Shanghai) Chemical Industry Development Co., Ltd.), catalyst (sodium hydroxide, 0.1 gram) joins in the reactor, closes the reactor, replaces with nitrogen Air in the kettle, stirring, heating up to 120°C, slowly press in about 88 grams of ethylene oxide, and then continue the reaction for two hours. Cool down to get the product. NMR 13 The analysis results of C showed that the peaks with chemical shifts of 67-72 were the formed ether bonds.

[0140] The corrosion and scale inhibitor composition used and the addition amount of each component are:

[0141] 4-methyl-7-polyoxyethylene-quinoline 35mg / L

[0142] Bisimidazoline 4mg / L

[0143] Acrylic acid copolymer 5mg / L

[0144] Bisimidazoline was purchased from Qinhuangdao Shengli Chemical Factory, the brand name is DLPM.

[0145] The acrylic acid copolyme...

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Abstract

The invention discloses a corrosion and scale inhibitor composition and an application thereof. The composition includes at least one quinoline derivative, at least one imidazoline derivative and at least one acrylic derivative. The quinoline derivative is selected from quinoline containing an ethylene oxide substituent group. The imidazoline derivative is selected from imidazoline quaternary ammonium salt and bisimidazoline. The invention also discloses an oil field water injection wellbore corrosion and scale prevention method which includes a step of feeding the corrosion and scale inhibitor composition into an oil field water injection wellbore. The corrosion and scale inhibitor composition has excellent corrosion and scale inhibition effect on metal members working under a high-temperature and high-pressure environment (such as the oil field water injection wellbore), and in addition, the corrosion and scale inhibitor composition is free of phosphoric compounds and is free of environment pollution, is environment-friendly, is simple in composition and reduces difficulty of on-site operation.

Description

technical field [0001] The invention relates to a corrosion and scale inhibitor composition and application thereof, and also relates to an oilfield water injection wellbore corrosion and scale inhibitor method. Background technique [0002] At present, most of my country's oil fields have entered the middle and late stages of development, and water injection is generally used for oil recovery. In the case of serious shortage of water resources, the reinjection of oil production sewage not only solves the problem of water shortage, but also solves the problem of environmental pollution caused by the discharge of oil production sewage. However, oil extraction wastewater contains a large number of microorganisms, Ca 2+ , Mg 2+ , Cl - , SO 4 2- Corrosion and scaling ions such as ions are easy to cause corrosion and scaling of facilities, especially in the high temperature and high pressure conditions of water injection wells, the corrosion and scaling are more serious. Co...

Claims

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Application Information

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IPC IPC(8): C09K8/54C09K8/528E21B37/06E21B41/02
Inventor 王秀
Owner CHINA PETROLEUM & CHEM CORP
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