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Self-emulsifying hydrophobic association type polyacrylamide grafted guanidine gum, preparation method thereof and application thereof in oil field

A technology of polyacrylamide and hydrophobic association, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., and can solve problems such as poor mineralization resistance, poor temperature resistance of guar gum, and large residue content

Pending Publication Date: 2020-06-23
甘肃智仑新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, guar gum has the disadvantages of poor temperature resistance, poor mineralization resistance, and large residue content.

Method used

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  • Self-emulsifying hydrophobic association type polyacrylamide grafted guanidine gum, preparation method thereof and application thereof in oil field
  • Self-emulsifying hydrophobic association type polyacrylamide grafted guanidine gum, preparation method thereof and application thereof in oil field
  • Self-emulsifying hydrophobic association type polyacrylamide grafted guanidine gum, preparation method thereof and application thereof in oil field

Examples

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preparation example Construction

[0037] Concrete preparation process realizes by following reaction:

[0038]

[0039] Concrete, a kind of preparation method and application of self-emulsifying hydrophobic association type polyacrylamide grafted guar gum of the present invention comprise the following steps:

[0040] 1) Take 100g of paraffin and add it to a 250mL beaker, then add 10g of Span 80 (Span-80) / polyoxyethylene octylphenol ether-10 (OP-10) compound emulsifier and 3.3g of cetyl alcohol , heated and stirred to completely dissolve cetyl alcohol to obtain an oil phase. Slowly add 50-100 g of guar gum (GG) aqueous solution with a mass fraction of 2.5% into the oil phase under stirring state, and continue to stir for a period of time to obtain a reverse emulsion of guar gum.

[0041] 2) Transfer the inverse emulsion to a 250mL three-neck flask, place it in a water bath, turn it on and stir it, blow in nitrogen for 20 minutes, weigh and add 0.2-0.6g of acrylamide solution (AM), 0.2-0.6g of 2-acrylamide ...

Embodiment 1

[0049] Weigh 100g of paraffin and add it to a 250mL beaker, then add 10g of Span 80 (Span-80) / polyoxyethylene octylphenol ether-10 (OP-10) composite emulsifier and 3.3g of cetyl alcohol, and heat and stirring, so that the cetyl alcohol is completely dissolved to obtain an oil phase. Under the state of stirring, 50 g of guar gum aqueous solution with a mass fraction of 2.5% was slowly added into the oil phase, and continued to stir for a period of time to prepare the inverse emulsion of guar gum. Move the inverse emulsion to a 250mL three-necked flask, place it in a water bath, turn it on and stir, and blow nitrogen gas for 20 minutes, then weigh 0.2g of acrylamide solution, 0.3g of 2-acrylamido sodium dodecanesulfonate solution and 0.3g of N- The n-dodecylacrylamide solution was added into the three-necked flask, and the nitrogen gas was continued for 20 minutes. Add 0.02 g of the prepared initiators, stir under the condition of nitrogen gas flow, stop the nitrogen gas flow a...

Embodiment 2

[0051] Weigh 100g of paraffin and add it to a 250mL beaker, then add 10g of Span 80 (Span-80) / polyoxyethylene octylphenol ether-10 (OP-10) composite emulsifier and 3.3g of cetyl alcohol, and heat and stirring, so that the cetyl alcohol is completely dissolved to obtain an oil phase. Under the state of stirring, 50 g of guar gum aqueous solution with a mass fraction of 2.5% was slowly added into the oil phase, and continued to stir for a period of time to prepare the inverse emulsion of guar gum. Move the inverse emulsion to a 250mL three-necked flask, place it in a water bath, turn it on and stir, and blow nitrogen for 20min, then weigh 0.25g of acrylamide solution, 0.27g of 2-acrylamido sodium dodecanesulfonate solution and 0.28g of N - Add the n-dodecylacrylamide solution into the three-necked flask, and continue to pass nitrogen gas for 20 minutes. Add 0.02 g of the configured initiators, stir under the condition of nitrogen gas flow, stop the nitrogen gas flow after 30 mi...

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Abstract

The invention discloses a self-emulsifying hydrophobic association type polyacrylamide grafted guanidine gum and a preparation method and application thereof in an oil field, and the preparation method comprises the following steps: 1) mixing paraffin, a compound emulsifier and hexadecanol to prepare an oil phase; adding guanidine gum to obtain a reversed-phase emulsion; 2) adding the reversed-phase emulsion into an acrylamide solution, a sodium 2-acrylamido dodecanesulfonate solution and an N-n-dodecyl acrylamide solution; 3) adding an initiator solution, stirring under the condition of introducing nitrogen, and stopping introducing the nitrogen into the sealing device for reaction; 4) after the reaction is finished, demulsifying with ethanol, performing suction filtration, washing and drying to obtain a crude product; 5) extracting the crude product, and 6) adding a borax cross-linking agent into the grafted guanidine gum solution to prepare the self-emulsifying hydrophobic association type polyacrylamide grafted guanidine gum fracturing fluid. The salt resistance of the guanidine gum fracturing fluid is improved, and the temperature resistance and salt resistance of the copolymer grafted guanidine gum fracturing fluid are improved.

Description

technical field [0001] The invention relates to the technical field of high-temperature and high-salt well fracturing fluid, in particular to a self-emulsifying hydrophobic association type polyacrylamide grafted guar gum, a preparation method thereof and an application in oil fields. Background technique [0002] Guar gum fracturing fluid has been popularized and applied in most low-permeability reservoirs in my country because of its stronger sand-carrying fracturing ability and reservoir conductivity than ordinary fracturing fluids. However, guar gum has the disadvantages of poor temperature resistance, poor mineralization resistance, and large residue content. Therefore, it is of great significance to develop a guar gum fracturing fluid that can still have effective fracturing effects in high-temperature and high-salt wells. Contents of the invention [0003] In order to solve the shortcomings of guar gum fracturing fluid that is not resistant to temperature and salin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/56C08F220/58C08F220/54C09K8/68C09K8/88
CPCC08F251/00C09K8/685C09K8/887C09K8/882C08F220/56C08F220/54
Inventor 王晨韩非杨晓武李培枝
Owner 甘肃智仑新材料科技有限公司
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