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Preparation method of polyether-containing hydrophobic association polymer and application of polyether-containing hydrophobic association polymer in fracturing fluid

A hydrophobic association, polymer technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor temperature resistance, slow dissolution rate, etc., and achieve low cost, fast dissolution, and high yield. Effect

Inactive Publication Date: 2021-09-24
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method for preparing a polyether-containing hydrophobic association polymer, aiming at the shortcomings of existing hydrophobic association polymer fracturing fluids such as poor temperature resistance and slow dissolution rate.

Method used

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  • Preparation method of polyether-containing hydrophobic association polymer and application of polyether-containing hydrophobic association polymer in fracturing fluid
  • Preparation method of polyether-containing hydrophobic association polymer and application of polyether-containing hydrophobic association polymer in fracturing fluid
  • Preparation method of polyether-containing hydrophobic association polymer and application of polyether-containing hydrophobic association polymer in fracturing fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Synthesis of Hydrophobic Monomer 10-Undecylenyl Hexylamide

[0047] Dissolve 0.1 mol of n-hexylamine in dichloromethane, add the solution into a three-neck round bottom flask, lower the temperature of the reaction system to below 5°C in an ice-water bath, add triethylamine at a molar ratio of 1:1.2, and then use constant Slowly add a mixed solution of 0.11 mol methacryloyl chloride and dichloromethane dropwise into the funnel, heat up to room temperature after the addition, react for 9 hours, wash the solution with deionized water until neutral, dry and rotary evaporate to obtain the hydrophobic monomer 10 -undecylenylhexylamide, the yield is 86%.

Embodiment 2

[0049] Synthesis of Hydrophobic Monomer 10-Undecylenyl Hexylamide

[0050]Dissolve 0.1 mol of n-hexylamine in dichloromethane, add the solution into a three-neck round bottom flask, lower the temperature of the reaction system to below 5°C in an ice-water bath, add triethylamine at a molar ratio of 1:1.2, and then use constant Slowly add a mixed solution of 0.11 mol methacryloyl chloride and dichloromethane dropwise into the funnel, heat up to room temperature after the addition, react for 10 hours, wash the solution with deionized water until neutral, dry and rotary evaporate to obtain the hydrophobic monomer 10 - undecylenyl hexylamide, the yield is 88%.

Embodiment 3

[0052] Synthesis of Hydrophobic Monomer 10-Undecylenyl Hexylamide

[0053] Dissolve 0.1 mol of n-hexylamine in dichloromethane, add the solution into a three-neck round bottom flask, lower the temperature of the reaction system to below 5°C in an ice-water bath, add triethylamine at a molar ratio of 1:1.2, and then use constant Slowly add a mixed solution of 0.11mol methacryloyl chloride and dichloromethane dropwise into the funnel, heat up to room temperature after the addition, react for 11 hours, wash the solution with deionized water until neutral, dry and rotary evaporate to obtain the hydrophobic monomer 10 - undecylenyl hexylamide, the yield is 93%.

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Abstract

The invention discloses a preparation method of a polyether-containing hydrophobic association polymer and application of the polyether-containing hydrophobic association polymer in fracturing fluid. According to the technical scheme, the preparation method comprises the following steps: (1) firstly, carrying out a reaction on lauryl alcohol polyoxyethylene ether and thionyl chloride to obtain an intermediate AEO-23-Cl, and then carrying out a reaction on the intermediate AEO-23-Cl and dimethylaminoethyl methacrylate to obtain a polyether monomer AEOA; (2) reacting the 10-undecenoyl chloride with n-hexylamine to obtain a hydrophobic monomer 10-undecenoyl hexylamine; and (3) adding an initiator into a polyether monomer AEOA, a hydrophobic monomer 10-undecylenyl hexylamine, acrylamide, acrylic acid and 2-acrylamido-2-methylpropanesulfonic acid at 30 DEG C, reacting for 5-10 hours, and drying and pulverizing to obtain the polymer powder HAEOA. The fracturing fluid has excellent dissolving performance, and also has good temperature resistance and shear resistance. The preparation method disclosed by the invention has the characteristics of low cost, high yield and simple preparation process, and the prepared product has excellent quick dissolving performance and has a better application prospect in oil field fracturing and recovery efficiency improvement.

Description

technical field [0001] The invention relates to a polyether-containing polymer, a preparation method thereof and an application in fracturing fluid, belonging to the field of oilfield chemical additives. [0002] technical background [0003] With the large-scale exploitation and consumption of conventional oil and gas reservoirs, tight sandstone gas, coalbed methane, shale gas and other low-permeability, ultra-low-permeability, deep-layer high-temperature unconventional oil and gas resources urgently need to be developed and utilized. Fracturing is an important means for increasing production of oil and gas wells and increasing injection of water injection wells. In particular, many tight oil and gas reservoirs have been discovered in recent years. At the initial stage of production, the production is very low or even no production, and it needs to be fracturing to have a certain production value. Fracturing fluid is the working fluid in the process of hydraulic fracturing ...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/56C08F220/06C08F220/58C08F220/70C09K8/68C09K8/88
CPCC08F283/065C09K8/68C09K8/882C08F220/56C08F220/06C08F220/585C08F220/70
Inventor 毛金成汪全航薛金星张恒杨小江林冲
Owner SOUTHWEST PETROLEUM UNIV
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