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A polymer oil displacement agent based on host-guest interaction and preparation method thereof

A polymer, host-guest technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of inability to achieve effective oil displacement, inability to maintain viscosity-increasing ability, poor temperature resistance, salt resistance and shear resistance. and other problems, to achieve the effect of improving oil recovery, enhancing rigidity and good viscoelasticity

Inactive Publication Date: 2018-01-19
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor performance of polyacrylamide and partially hydrolyzed polyacrylamide in temperature resistance, salt resistance, and shear resistance, they cannot maintain good viscosity-increasing ability and cannot achieve effective oil displacement under harsh reservoir conditions.

Method used

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  • A polymer oil displacement agent based on host-guest interaction and preparation method thereof
  • A polymer oil displacement agent based on host-guest interaction and preparation method thereof
  • A polymer oil displacement agent based on host-guest interaction and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] A polymer oil displacement agent based on host-guest interaction, comprising the following substances: polymer monomer: acrylamide-adamantane (N-ADA), acrylamide (AM), acrylic acid (AA), acrylamide-β -cyclodextrin (N-β-CD), and accounts for 0.15%, 18.75%, 3.75%, 0.25% of the total mass of the solution; solubilizer: sodium lauryl sulfate, which accounts for 0.5% of the total mass of the solution; Initiator: ammonium persulfate, sodium bisulfite, and accounts for 0.014% and 0.006% of the total mass of the solution respectively; water: accounts for 76.58% of the total mass of the solution.

[0052] Above-mentioned polymer oil displacement agent is made through the following steps:

[0053] Step S10, put sodium lauryl sulfate and acrylamido-adamantane (N-ADA) in a beaker, add distilled water and stir until the solution is transparent; step S20, add acrylamide (AM) to the solution prepared above , acrylic acid (AA), acrylamide-β-cyclodextrin (N-β-CD), stirring and dissolvin...

Embodiment 2

[0055] A polymer oil displacement agent based on host-guest interaction, comprising the following substances: polymer monomer: acrylamide-adamantane (N-ADA), acrylamide (AM), acrylic acid (AA), acrylamide-β -cyclodextrin (N-β-CD), and accounts for 0.35%, 21.25%, 6.25%, 0.85% of the total mass of the solution; solubilizer: sodium lauryl sulfate, which accounts for 2% of the total mass of the solution; Initiator: ammonium persulfate and sodium bisulfite, which account for 0.02% and 0.009% of the total mass of the solution; water: 69.271% of the total mass of the solution.

[0056] Above-mentioned polymer oil displacement agent is made through the following steps:

[0057] Step S10, put sodium lauryl sulfate and acrylamido-adamantane (N-ADA) in a beaker, add distilled water and stir until the solution is transparent; step S20, add acrylamide (AM) to the solution prepared above , acrylic acid (AA), acrylamide-β-cyclodextrin (N-β-CD), stirring and dissolving; step S30, adjusting t...

Embodiment 3

[0059] A polymer oil displacement agent based on host-guest interaction, comprising the following substances: polymer monomer: acrylamide-adamantane (N-ADA), acrylamide (AM), acrylic acid (AA), acrylamide-β -cyclodextrin (N-β-CD), and accounts for 0.125%, 20%, 3.75%, 0.25% of the total mass of the solution; solubilizer: sodium lauryl sulfate, which accounts for 1% of the total mass of the solution; Initiator: ammonium persulfate, sodium bisulfite, and accounts for 0.0165% and 0.0075% of the total mass of the solution; water: accounts for 74.851% of the total mass of the solution.

[0060] The polymer oil displacing agent is prepared by the following specific mass components: add 0.05g acrylamido-adamantane, 0.4g sodium lauryl sulfate and 30g deionized water into a 100mL beaker, stir to dissolve, and then add 8g of acrylamide, 1.5g of acrylic acid and 0.1g of acrylamide-β-cyclodextrin, stir and dissolve, slowly add 20wt% sodium hydroxide solution dropwise until the pH value of ...

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Abstract

The invention discloses a polymeric oil-displacing agent based on host-guest interaction, comprising the following materials: polymer monomers: acrylamide-adamantane (N-ADA), acrylamide (AM), acrylic acid (AA), acrylamide-Beta-cyclodextrin (N-Beta-CD), accounting for respectively 0.15-0.35%, 18.75-21.25%, 3.75-6.25% and 0.25-0.85% of total mass of a solution; a solubilizer: sodium dodecyl sulfate, accounting for 0.5-2% of total mass of the solution; a composite initiator: ammonium persulfate and sodium hydrogen sulfite, accounting for 0.014-0.02% and 0.006-0.009% of total mass of the solution; the balance of water. A polymer prepared herein has high temperature resistance, salt resistance and shear resistance and is well useful in increasing crude oil recovery of a high-temperature high-salt oilfield.

Description

technical field [0001] The invention belongs to the field of oilfield chemistry in the enhanced oil recovery technology, and in particular relates to a polymer oil displacement agent based on host-guest interaction and a preparation method thereof. Background technique [0002] Polymer flooding technology is one of the important technologies for enhancing oil recovery in oilfields. By adding polymer flooding agent to the aqueous solution to increase the viscosity of the aqueous solution, the fluidity can be controlled to enhance oil recovery. Polyacrylamide and partially hydrolyzed polyacrylamide are the most widely used polymer oil displacement agents in oilfields. However, due to the poor performance of polyacrylamide and partially hydrolyzed polyacrylamide in temperature resistance, salt resistance, and shear resistance, they cannot maintain good viscosity-increasing ability and achieve effective oil displacement under harsh reservoir conditions. [0003] According to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/54C08F220/56C08F220/06C09K8/588
CPCC08F251/00C09K8/588C08F220/54C08F220/56C08F220/06
Inventor 蒲万芬杨洋魏兵姜峰
Owner SOUTHWEST PETROLEUM UNIV