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High temperature acidified mutual solvent

An acidifying mutual solvent, high temperature technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem that surfactants can not play the role of anti-corrosion, anti-demulsification, demulsification, etc.

Inactive Publication Date: 2006-04-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

At the same time, after the active components such as corrosion inhibitors are adsorbed on the rock surface, the surfactant cannot play the expected anti-corrosion, anti-emulsion, demulsification and other functions.

Method used

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  • High temperature acidified mutual solvent
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Embodiment Construction

[0023] The composition, preparation process and performance parameters of the present invention will be described in detail below in conjunction with examples.

[0024] (1) Raw material performance requirements

[0025] The effective content of dipropylene glycol monomethyl ester is greater than 96%;

[0026] The effective content of 2,3 epoxypropyltrimethylammonium chloride is greater than 96%;

[0027] The effective content of polyoxyethylene polyoxypropylene tetraethylenepentamine is greater than 93%.

[0028] (2) Preparation examples and performance parameters of high-temperature acidified mutual solvents

[0029] 1m to the activated 3 Add 220kg of water, 460kg of dipropylene glycol monomethyl ester and 280kg of polyoxyethylene polyoxypropylene tetraethylenepentamine into the emulsifier, raise the temperature to 50°C, and stir until completely dissolved. Then add 40kg2,3 glycidyltrimethylammonium chloride while stirring, and stir until a uniform transparent solution is...

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Abstract

A high-temp acidifying mutual solvent is prepared from dipropanedio monomethylester, polyoxyvinyl-polyoxyallyl-tetravinyl pentaamine, 2,3-epoxy propyl-ammonium trimethylchloride and water. When it is used in hydrochloric acid solution, the dissolved kerosene can be increased by 30%.

Description

Technical field: [0001] The invention relates to a chemical agent for oilfield acidification, especially a high-temperature acidification mutual solvent. Background technique: [0002] Acidifying mutual solvent refers to the chemical agent that can make acid liquid and crude oil miscible. The reasons for using mutual solvents in oilfield acidizing are: [0003] (1) Due to the adsorption and deposition of active components or heavy components in crude oil on the rock surface, the oil on the rock surface prevents the contact and reaction between the acid and the rock surface, and increases the flow resistance of crude oil in porous media. [0004] (2) Active components such as corrosion inhibitors in the acid solution can be adsorbed on the rock surface, turning the hydrophilic rock surface into an oil-wet surface, preventing further contact between the acid and the rock surface, and reducing the oil phase permeability. At the same time, after the active components such as c...

Claims

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Application Information

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IPC IPC(8): C09K8/72
Inventor 张贵才葛际江孙铭勤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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