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Organic-alkali corrosion inhibitor for oil-well acidizing residual liquid treatment and preparation method of organic alkali corrosion inhibitor,

An oil well acidification and corrosion inhibitor technology, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve problems such as corrosion and scaling of pipes, and achieve the effect of convenient operation and simple method.

Inactive Publication Date: 2018-06-22
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an organic alkali corrosion inhibitor for the treatment of oil well acidizing raffinate to solve the problem of corrosion and scaling of pipes caused by the flowback raffinate in the process of oil well acidification and flowback

Method used

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  • Organic-alkali corrosion inhibitor for oil-well acidizing residual liquid treatment and preparation method of organic alkali corrosion inhibitor,
  • Organic-alkali corrosion inhibitor for oil-well acidizing residual liquid treatment and preparation method of organic alkali corrosion inhibitor,
  • Organic-alkali corrosion inhibitor for oil-well acidizing residual liquid treatment and preparation method of organic alkali corrosion inhibitor,

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Experimental program
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Effect test

Embodiment 1

[0052] An organic alkali corrosion inhibitor used for oil well acidizing raffinate treatment, comprising the following components, by weight percentage:

[0053] 15% ethanolamine,

[0054] 7.5% Mannich base corrosion inhibitor,

[0055] 5% lutidine quaternary ammonium corrosion inhibitor,

[0056] 3% sodium dodecylbenzenesulfonate,

[0057] 3% sodium diethylenetriaminepentamethylenephosphonate,

[0058] 8% ethanol,

[0059] The balance is water.

[0060] Among them, the Mannich base corrosion inhibitor is: R 1 C(O)CH 2 CH 2 NR 2 R 3 , where R 1 for C 6 h 5 -, R 2 and R 3 for CH 3 CH 2 -.

[0061] Wherein, lutidine quaternary ammonium corrosion inhibitor is: C 15 h 20 ClN.

[0062] The above-mentioned organic alkali corrosion inhibitor used for oil well acidizing raffinate treatment, its preparation method is:

[0063] Stir 7.5 parts of Mannich base corrosion inhibitor and 5 parts of lutidine quaternary ammonium salt with ethanol until they are completely d...

Embodiment 2

[0074] An organic alkali corrosion inhibitor used for oil well acidizing raffinate treatment, comprising the following components, by weight percentage:

[0075] 12% ethanolamine,

[0076] 6% Mannich base corrosion inhibitor,

[0077] 7% lutidine quaternary ammonium corrosion inhibitor,

[0078] 4% sodium dodecylbenzenesulfonate,

[0079] 4% sodium diethylenetriaminepentamethylenephosphonate,

[0080] 7% ethanol,

[0081] The balance is water.

[0082] Among them, the Mannich base corrosion inhibitor is: R 1 C(O)CH 2 CH 2 NR 2 R 3 , where R 1 for C 6 h 5 -, R 2 and R 3 for CH 3 CH 2 -.

[0083] Wherein, lutidine quaternary ammonium corrosion inhibitor is: C 15 h 20 ClN.

[0084] Preparation method: Stir 6 parts of Mannich base corrosion inhibitor and 7 parts of lutidine quaternary ammonium salt with ethanol until completely dissolved, then add 20% of water to be added under constant stirring and continue stirring for 30 minutes, then proportionally Add 15 ...

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Abstract

The invention discloses an organic-alkali corrosion inhibitor for oil-well acidizing residual liquid treatment and a preparation method of the organic-alkali corrosion inhibitor, and belongs to the technical field of crude oil exploitation. The organic-alkali corrosion inhibitor consists of the following substances in percentage by mass: 10-20% of ethanolamine, 5-10% of a Mannich alkali corrosioninhibitor, 1-9% of dimethyl pyridine quaternary ammonium salt corrosion inhibitor, 1-5% of sodium dodecyl benzene sulfonate, 1-5% of diethylenetriaminepenta(methylenephosphonicacid) sodium salt, 5-10%of ethanol and the balance of water. The organic-alkali corrosion inhibitor for oil-well acidizing residual liquid treatment provided by the invention can be used to solve the problem of corrosion and scaling of a flow back residue fluid to tubular products in an oil-well acidizing flow back process.

Description

technical field [0001] The invention belongs to the technical field of crude oil exploitation, and in particular relates to an organic alkali corrosion inhibitor used for treatment of oil well acidification raffinate and a preparation method thereof. Background technique [0002] During the production process of oil wells, particulate matter in oil-bearing formations and naturally occurring corrosion and scaling products underground will block the seepage channels of oil formations, resulting in a decline in crude oil production. In order to ensure the normal production of oil wells, pickling and plugging removal methods are generally used. Acid washing is to dissolve various solids deposited in the formation near the wellbore during drilling, completion, workover, water injection, and enhanced injection through the flow and reaction of acid liquid in the intercrystals, cavities, and micro-fractures of the formation pores. Remove phase particles and impurities, remove their...

Claims

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Application Information

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IPC IPC(8): C09K8/74C09K8/54
CPCC09K8/74C09K8/54C09K2208/32
Inventor 周佩董俊何治武刘宁姜毅何淼刘爱华邱筱琳
Owner PETROCHINA CO LTD
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