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A kind of quaternary ammonium salt type gemini surfactant and its preparation, product and application

A technology of surfactant and quaternary ammonium salt, applied in the field of quaternary ammonium salt type Gemini surfactant and its preparation

Inactive Publication Date: 2019-01-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although viscoelastic surfactant-based fracturing fluids have many advantages such as no residue and less damage to the formation, there are problems with temperature and salt resistance in this type of viscoelastic surfactants.

Method used

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  • A kind of quaternary ammonium salt type gemini surfactant and its preparation, product and application
  • A kind of quaternary ammonium salt type gemini surfactant and its preparation, product and application
  • A kind of quaternary ammonium salt type gemini surfactant and its preparation, product and application

Examples

Experimental program
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Effect test

preparation example

[0072] Synthetic intermediate bridge chain

[0073] (1) Synthesis of 1,2-bis(2-chloroacetamide)ethane

[0074] First, dissolve 20g of chloroacetyl chloride in 240mL of chloroform, 55.2g of potassium carbonate in 240mL of water, and 4.8g of ethylenediamine in 200mL of chloroform; then add the ethylenediamine solution into the three-necked flask, and adjust the temperature of the water bath to 0°C , and then slowly drop the chloroacetyl chloride solution and the potassium carbonate solution into the ethylenediamine solution at the same time, and the dropping time is about 1 hour. After the dropwise addition, react at room temperature for 4 h. Suction filtration and washing with water twice, and recrystallization with absolute ethanol to obtain 1,2-bis(2-chloroacetamide)ethane with a yield of 50%.

[0075]

[0076] (2) 2,4-bis(bromoacetamide)aminopyrimidine

[0077] First, dissolve 20g of chloroacetyl chloride in 240mL of chloroform, dissolve 55.2g of potassium carbonate in...

Embodiment 1

[0127] First Gemini cationic surfactant diacetyl ethylenediamine base bis[dimethylhexadecyl ammonium chloride] (preparation example synthetic Gemini surfactant (1) preparation) and water are mixed to obtain uniform transparent liquid, Then add counter ion salt ammonium chloride in transparent liquid under stirring condition, chelating agent EDTA, the mass percentage that mixes to obtain said Gemini cationic surfactant is 1.8%, and counter ion mass percentage is 1.5%, chelating agent quality The percentage is 0.2%. The medium-high temperature clean fracturing fluid obtained in this example, at 25°C for 170s -1 The viscosity under shearing is 100mPa·s, at 100°C, 110°C, 120°C, shearing for 90min, the viscosities are 80mPa·s, 75mPa·s, 60mPa·s respectively, and has good temperature and shear resistance. For the temperature and shear resistance trend graphs at 100°C, 110°C, and 120°C, please refer to the attached figure 1 , with figure 2 , with image 3 . At 95°C, a fracturing...

Embodiment 2

[0129] First Gemini cationic surfactant diacetyl ethylenediamine base bis[dimethylstearamidopropyl ammonium chloride] (preparation example synthetic Gemini surfactant (2) preparation) and water are mixed to obtain uniform transparent liquid , then add counterion salt potassium chloride, chelating agent sodium polyphosphate under stirring condition in the transparent liquid, the mass percentage that mixes to obtain said Gemini cationic surfactant is 2%, and counter ion mass percentage is 2% , the chelating agent mass percentage is 0.25%. The warm and clean fracturing fluid obtained in this example, at 25°C for 170s -1 The viscosity under shearing is 100mPa·s, at 100°C, 120°C, 140°C, shearing for 90min, the viscosities are 85mPa·s, 75mPa·s, 65mPa·s respectively, with good temperature resistance, shear resistance and portability sand properties. At 95°C, a fracturing fluid with a proppant of 20-40 mesh and a sand-to-sand ratio of 30% is selected, and its sedimentation rate is 1...

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Abstract

The invention provides a quaternary ammonium salt type Gemini surface active agent and preparation, a product and application thereof. The surface active agent is shown as the formula (I), and please see the formula (I) in the description, wherein R1 is a saturated or unsaturated alkyl group with the main chain carbon atom number being 16-26, or a saturated or unsaturated alkyl group with the main chain carbon atom number being 16-26 and containing an amide group; R2 is methyl or ethyl or ethoxyl; R3 is selected from one of ethylidene; X is chlorine or bromine. According to the synthesized Gemini surface active agent, the highest temperature resisted by the surface active agent can reach 160 DEG C, and the temperature resistance is better than that of an existing conventional dimeric surface active agent.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a quaternary ammonium salt type Gemini surfactant and its preparation, product and application. Background technique [0002] my country's oil and gas fields are rich in reserves in low-permeability layers, but their natural productivity is low or has no natural productivity at all. It is difficult to obtain economic development value without fracturing and stimulation to improve single well production. The application of fracturing fluid technology to exploit such reservoirs is of great significance, and fracturing fluid is one of the keys to the success of hydraulic fracturing. [0003] At present, the most commonly used fracturing fluid at home and abroad is water-based fracturing fluid. Water-based fracturing fluid is mainly composed of thickener, cross-linking agent, potassium chloride, gel breaker and water, and supplemented with other additives as needed. Among them...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C237/10C07C231/12C07D239/48C07D213/75C07C279/22C07C277/08C09K8/68
CPCC07C231/12C07C237/10C07C277/08C07C279/22C07D213/75C07D239/48C09K8/68
Inventor 胡智渊杨春鹏蒋庆哲赵晶晶宋昭峥
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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