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Water-soluble polymer oil displacement agent

A technology of water-soluble polymer and oil-displacing agent, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of polymer precipitation, solution viscosity, and molecular chains are prone to curling, etc. shear recovery effect

Inactive Publication Date: 2015-06-17
HAO YU ADDITION AGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As one of the main means of improving oil recovery, polymer oil displacement agent still has many problems in tertiary oil recovery: for example, the most commonly used PAM and HPAM for oil displacement are prone to curling of molecular chains under high temperature environment, and polymer hydrodynamic volume decreases. small, the solution viscosity is significantly lower, and Ca 2+ , Mg 2+ The existence of plasma tends to cause polymer precipitation, etc., thereby reducing its oil displacement efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of water-soluble polymer oil displacement agent, is made up of following material, (weight percent)

[0017] Polymer monomers include: acrylic acid (AA), acrylamide (AM), N,N-diallyl-3-pyridinecarboxamide (DANA) and N,N-dimethylformamide (DMF), monomer The total content is 20wt%, wherein the content of each monomer, AM / AA=6:4, DANA accounts for 0.16wt% of the total monomer content, and DMF accounts for 0.15wt% of the total monomer content;

[0018] Composite initiator: ammonium persulfate-sodium bisulfite, accounting for 2% of the total content;

[0019] Emulsifier: nonylphenol polyoxyethylene ether OP-10, accounting for 4% of the total content;

[0020] Water: 74wt% of the total content;

[0021] The preparation method of water-soluble polymer oil displacement agent of the present invention,

[0022] (1) Prepare a solution; mix N,N-diallyl-3-pyridinecarboxamide (DANA) monomer, N,N-dimethylformamide (DMF) monomer and nonylphenol polyoxyethylene ether OP -10 a...

Embodiment 2

[0026] A kind of water-soluble polymer oil displacement agent is made up of following material, (weight percent)

[0027] Polymer monomers include: acrylic acid (AA), acrylamide (AM), N,N-diallyl-3-pyridinecarboxamide (DANA) and N,N-dimethylformamide (DMF), monomer The total content is 20wt%, wherein the content of each monomer, AM / AA=6:4, DANA accounts for 0.16wt% of the total monomer content, and DMF accounts for 0.15wt% of the total monomer content;

[0028] Composite initiator: ammonium persulfate-sodium bisulfite, accounting for 4% of the total content;

[0029] Emulsifier: nonylphenol polyoxyethylene ether OP-10, accounting for 6% of the total content;

[0030] Water: 70wt% of the total content;

[0031] The preparation method of water-soluble polymer oil displacement agent of the present invention,

[0032] (1) Prepare a solution; mix N,N-diallyl-3-pyridinecarboxamide (DANA) monomer, N,N-dimethylformamide (DMF) monomer and nonylphenol polyoxyethylene ether OP -10 an...

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PUM

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Abstract

A water-soluble polymer oil displacement agent comprises 20wt% of a polymer monomer, 2-4wt% of a composite initiator ammonium persulfate-sodium bisulfate and 4-6wt% of an emulsifier polyoxyethylene nonyl phenyl ether OP-10; and the polymer monomer comprises acrylic acid (AA), acrylamide (AM), N,N-diallyl-3-pyridinecarboxamide ( DANA) and N,N-dimethyl formamide (DMF). A preparation method of the water-soluble polymer oil displacement agent comprises the following steps: 1, preparing a solution; 2, synthesizing a primary product; and 3, refining the product. The oil displacement agent prepared in the invention is characterize din that a pyridine ring structure monomer is introduced to a polymer molecular chain, so the mechanical performances, the thermal stability and the chemical stability of the polymer are improved; and a hydrophobic long chain is introduced into the polymer molecular chain, and intermolecular association is carried out, so the viscosity and the shear recovery of the polymer are improved.

Description

technical field [0001] The invention relates to a polymer oil displacement agent, which belongs to the technical field of petroleum exploitation. Background technique [0002] As one of the main means of improving oil recovery, polymer oil displacement agent still has many problems in tertiary oil recovery: for example, the most commonly used PAM and HPAM for oil displacement are prone to curling of molecular chains under high temperature environment, and polymer hydrodynamic volume decreases. small, the solution viscosity is significantly lower, and Ca 2+ , Mg 2+ The existence of plasma tends to cause polymer precipitation, etc., thereby reducing its oil displacement efficiency. Contents of the invention [0003] The present invention provides a water-soluble tetrapolymer oil displacing agent in order to overcome the deficiencies of the above-mentioned technologies. [0004] The technical scheme adopted of the present invention is: [0005] Water-soluble polymer oil d...

Claims

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Application Information

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IPC IPC(8): C09K8/588C08F220/56C08F220/06C08F226/02C08F220/54C08F2/30
CPCC09K8/588C08F2/30C08F220/56
Inventor 尹立华
Owner HAO YU ADDITION AGENT
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