Preparation method of clean thickening agent for fracturing

A thickening agent and cleaning technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of weak ability to form micelles, weak sand-carrying ability, high production cost, etc., to reduce repulsion, Good for oil displacement and good for environmental protection

Inactive Publication Date: 2020-07-28
山东滨州昱诚化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing a clean thickener for fracturing. The clean thickener for fracturing in the present invention is a linking group that connects three single-chain surfaces with long hydrophobic carbon chains. The active agents are connected to form three sub-surfactants, which solves the problem that the cleaning thickener for fracturing on the market currently has a high dosage, complex configuration, high production cost, and the existing surfactants form micelles. The ability of sand-carrying is weak, and the sand-carrying ability is not strong. When it is applied to water well fracturing, it is not conducive to oil displacement.

Method used

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  • Preparation method of clean thickening agent for fracturing
  • Preparation method of clean thickening agent for fracturing
  • Preparation method of clean thickening agent for fracturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add α-aminopropanamide into a reaction kettle with a certain amount of water added, heat to 40-60°C, and after α-aminopropanamide is completely melted, add palmitamide, isoamyl alcohol and sorbitol in sequence, Keep the temperature at 60°C for 2 hours;

[0022] (2) Add N,N'-ethylene bisstearamide, stir for 10-30 minutes, and keep the temperature at 60°C;

[0023] (3) Heat up to 70-80°C, add dichloropropanol and o-toluic acid several times, this process is an exothermic reaction, strictly control the feeding speed, cool with water when the temperature is at 70°C, then add some dichloropropanol Propanol and part o-toluic acid, this process is circulated, until dichloropropanol and o-toluic acid are all added in the reactor;

[0024] (4) Keep the heating rate at 30°C / h, raise the temperature to 120°C-130°C, react for 10-12 hours, and start cooling to 50-60°C after the reaction is over;

[0025] (5) Finally, add the remaining isoamyl alcohol, sorbitol and water, stir ...

Embodiment 2

[0027] (1) Add α-aminopropanamide into a reaction kettle with a certain amount of water added, heat to 40-60°C, and after α-aminopropanamide is completely melted, add palmitamide, isoamyl alcohol and sorbitol in sequence, Keep the temperature at 60°C for 2 hours;

[0028] (2) Add N,N'-ethylene bisstearamide, stir for 10-30 minutes, and keep the temperature at 60°C;

[0029] (3) Heat up to 70-80°C, add dichloropropanol and o-toluic acid several times, this process is an exothermic reaction, strictly control the feeding speed, cool with water when the temperature is at 70°C, then add some dichloropropanol Propanol and part o-toluic acid, this process is circulated, until dichloropropanol and o-toluic acid are all added in the reactor;

[0030] (4) Keep the heating rate at 30°C / h, raise the temperature to 120°C-130°C, react for 10-12 hours, and start cooling to 50-60°C after the reaction is over;

[0031] (5) Finally, add the remaining isoamyl alcohol, sorbitol and water, stir ...

Embodiment 3

[0033] (1) Add α-aminopropanamide into a reaction kettle with a certain amount of water added, heat to 40-60°C, and after α-aminopropanamide is completely melted, add palmitamide, isoamyl alcohol and sorbitol in sequence, Keep the temperature at 60°C for 2 hours;

[0034] (2) Add N,N'-ethylene bisstearamide, stir for 10-30 minutes, and keep the temperature at 60°C;

[0035] (3) Heat up to 70-80°C, add dichloropropanol and o-toluic acid several times, this process is an exothermic reaction, strictly control the feeding speed, cool with water when the temperature is at 70°C, then add some dichloropropanol Propanol and part o-toluic acid, this process is circulated, until dichloropropanol and o-toluic acid are all added in the reactor;

[0036] (4) Keep the heating rate at 30°C / h, raise the temperature to 120°C-130°C, react for 10-12 hours, and start cooling to 50-60°C after the reaction is over;

[0037] (5) Finally, add the remaining isoamyl alcohol, sorbitol and water, stir ...

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PUM

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Abstract

The invention discloses a preparation method of a clean thickening agent for fracturing, and relates to the technical field of oil exploitation, specifically to a preparation method of a clean thickening agent for fracturing. Three single-chain surfactants with long hydrophobic carbon chains are bonded through short linking groups to form a trimeric surfactant; therefore, the repulsive force between head groups of the surfactant can be greatly reduced; the surfactant can be self-assembled to form wormlike three-dimensional micelles which are mutually wound in the transverse direction and the longitudinal direction; the elasticity is high, so that a good thickening effect and excellent salt resistance and temperature resistance can be achieved at low concentration, sand-carrying fracture forming requirements can be met, the micelles can be formed after simple mixing, fluid preparation is simple, use is convenient, requirements on water quality of the prepared fluid are low, formation water can be quickly prepared on site, and the temperature resistance and shearing resistance are good.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a preparation method of a clean thickener for fracturing. Background technique [0002] Fracturing fluid is an important part and key link of fracturing reconstruction. High quality, low damage and low cost are the themes of fracturing fluid development. At present, water-based vegetable glue fracturing fluid is widely used at home and abroad, and the domestic market accounts for more than 90%. While the fracturing process is transforming the reservoir, due to the existence of vegetable gum fracturing fluid residues, filter cakes and concentrated gels, the permeability of fractures and formations is reduced (accumulative damage can reach 90%), and the production stimulation effect of fracturing is reduced. significantly reduce. In 1997, Schlumberger first proposed and developed a new type of surfactant fracturing fluid system (viscoelastic surfactant fracturing f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/60C09K8/68C09K8/584
CPCC09K8/602C09K8/68C09K8/584C09K2208/30C09K2208/26
Inventor 刘纪湘孙立军王俊德宋月晴王鲁燕李齐
Owner 山东滨州昱诚化工科技有限公司
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