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Diverting acid acidizing corrosion inhibitor and preparation method thereof

A technology of acidifying corrosion inhibitor and diverting acid, which is applied in chemical instruments and methods, earthwork drilling and production, wellbore/well components, etc. It can solve the problem of affecting the uniform distribution of diverting acid, hindering the effect of temporary plugging of acid fluid, and affecting oil field production efficiency and other issues, to achieve the effect of moderate cost, significant effect, and easy purchase of raw materials

Inactive Publication Date: 2016-06-22
南京华洲新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing conventional acidizing corrosion inhibitors will have a great impact on the diverting acid system of oilfield oil recovery and the corrosion inhibition effect is not good
The main reason is that certain surfactants, urotropine, formaldehyde, metal salts and some organic solvents contained in conventional corrosion inhibitors cause irreversible damage to the steering acid system itself in advance of viscosification or gel breaking, thus It hinders the temporary plugging effect of the acid fluid in the rock formation, affects the uniform distribution of the diverting acid in the formation, and seriously affects the recovery rate of the oil field

Method used

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  • Diverting acid acidizing corrosion inhibitor and preparation method thereof
  • Diverting acid acidizing corrosion inhibitor and preparation method thereof
  • Diverting acid acidizing corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of quaternary ammonium salt (mass percentage, the same below)

[0040] Complex alkylpyridine: 30%

[0041] Quinoline: 15%

[0042] Benzyl chloride: 32%

[0043] Ethylene glycol: 5%

[0044] Methanol / Ethanol: 18%

[0045] Throw in alkylpyridine, quinoline and ethylene glycol in turn, react with benzyl chloride, and keep warm at 120-140°C for 4h. After the reaction, methanol was added dropwise and stirred evenly until the reaction was completed to obtain the product quaternary ammonium salt.

[0046] Quaternary ammonium salt: 15%

[0047] Octylphenol ethoxylate: 8%

[0048] Propylene Glycol: 4.5%

[0049] Butynediol: 6%

[0050] Methylpentynol: 6%

[0051] Cinnamaldehyde: 3%

[0052] Methanol: 22%

[0053] Water: 34.5%

[0054] With reference to the Petroleum and Natural Gas Industry Standard of the People's Republic of China "SY / T5405-1996" method, the corrosion inhibitor samples prepared in Example 1 were tested against N at different concentrati...

Embodiment 2

[0058] Preparation of quaternary ammonium salt (mass percentage, the same below)

[0059] Alkylpyridine: 30%

[0060] Quinoline: 15%

[0061] Benzyl chloride: 32%

[0062] Ethylene glycol: 5%

[0063] Methanol / Ethanol: 18%

[0064] Throw in alkylpyridine, quinoline and ethylene glycol in turn, react with benzyl chloride, and keep warm at 120-140°C for 4h. After the reaction was completed, methanol was added dropwise and stirred evenly until the reaction was completed. The product quaternary ammonium salt is obtained.

[0065] Synthetic quaternary ammonium salt: 15%

[0066] Octylphenol ethoxylate: 8%

[0067] Propylene Glycol: 4.5%

[0068] Butynediol: 6%

[0069] Methylpentynol: 6%

[0070] Cinnamaldehyde: 3%

[0071] Methanol: 22%

[0072] Water: 34.5%

[0073] With reference to the People's Republic of China Petroleum and Natural Gas Industry Standard "SY / T5405-1996" method, the corrosion inhibitor samples prepared in Example 2 were used in different hydrochlor...

Embodiment 3

[0077] Preparation of quaternary ammonium salt (mass percentage, the same below)

[0078] Alkylpyridine: 20%

[0079] Quinoline: 25%

[0080] Benzyl chloride: 32%

[0081] Ethylene glycol: 5%

[0082] Methanol / Ethanol: 18%

[0083] Throw in alkylpyridine, quinoline and ethylene glycol in turn, react with benzyl chloride, and keep warm at 120-140°C for 4h. After the reaction was completed, methanol was added dropwise and stirred evenly until the reaction was completed. The product quaternary ammonium salt is obtained.

[0084] Quaternary ammonium salt: 15%

[0085] Octylphenol ethoxylate: 10%

[0086] Propylene Glycol: 5%

[0087] Butynediol: 6%

[0088] Methylpentynol: 6%

[0089] Cinnamaldehyde: 3%

[0090] Methanol: 20%

[0091] Water: 32%

[0092] With reference to the People's Republic of China Petroleum and Natural Gas Industry Standard "SY / T5405-1996" method, the corrosion inhibitor samples prepared in Example 3 were tested against N at different concentration...

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Abstract

The invention discloses a diverting acid acidification corrosion inhibitor and a preparation method thereof, belonging to the technical field of oilfield chemicals. According to the mass percentage of the present invention, the components of the corrosion inhibitor are quaternary ammonium salt, octylphenol polyoxyethylene ether, propynyl alcohol, butynediol, methylpentynyl alcohol, cinnamaldehyde, methanol and water. The present invention is compound alkylpyridine, quinoline, benzyl chloride, ethylene glycol, water, react and synthesize quaternary ammonium salt, and carry out with octylphenol polyoxyethylene ether, methanol, propynyl alcohol, cinnamaldehyde, water, etc. Compounding, the present invention aims to overcome the disadvantages of poor compatibility and poor corrosion inhibition effect in the existing corrosion inhibitor technology in the use of oil field diverting acid. The process route is simple, the synthetic product has no three wastes pollution, the cost is low, the raw materials are easy to purchase, and the advantages are convenient to use and the like.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion and protection, and specifically relates to a preparation method and performance research of a novel high-efficiency diverting acid acidification corrosion inhibitor. Background technique [0002] At present, with the continuous exploration and development of oil fields at home and abroad, a large number of deep low-permeability reservoirs have been discovered and exploited. There are more and more horizontal wells, multi-layer vertical wells, and highly deviated wells. Due to the strong homogeneity, it is difficult to distribute acid uniformly during acidizing. Many oil and gas fields need to rely on the acid diversion during acidizing to obtain more uniform acid distribution. However, the injection of acid liquid will cause serious corrosion of downhole metal pipes, which will lead to sudden rupture of downhole equipment. At the same time, the metal ions dissolved by acid will also damag...

Claims

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Application Information

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IPC IPC(8): C09K8/54C09K8/74
CPCC09K8/54C09K8/74C09K2208/32
Inventor 朱爱根陶远贤邢华忠张华王徽
Owner 南京华洲新材料有限公司
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