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Reinforced polyacrylamide bead for profile control and preparation method of reinforced polyacrylamide bead

A polyacrylamide and acrylamide technology, which is applied in chemical instruments and methods, drilling compositions and other directions, can solve the problem that the expansion rate of polyacrylamide gel microspheres does not have slow expansion characteristics, and achieve good technical effects. Effect

Active Publication Date: 2018-04-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is to solve the problem that the expansion rate of the existing polyacrylamide gel microspheres does not have the characteristics of slow expansion

Method used

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  • Reinforced polyacrylamide bead for profile control and preparation method of reinforced polyacrylamide bead
  • Reinforced polyacrylamide bead for profile control and preparation method of reinforced polyacrylamide bead
  • Reinforced polyacrylamide bead for profile control and preparation method of reinforced polyacrylamide bead

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 40 parts of acrylamide, 4 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 2 parts of tert-butylacrylamide, 2 parts of hydroxymethyl cellulose, 0.05 parts of crosslinking agent, 0.02 parts of ethylenediamine Disodium tetraacetate was dissolved in 60 parts of water to form an aqueous solution. Dissolve 5 parts of emulsifier in cyclohexane to prepare an oil phase solution. Add the oil phase solution into the reaction kettle with a stirring rate of 500r / min, add the aqueous solution of the reaction system into the reaction kettle, pass inert gas protection, and the temperature of the water bath is 30°C. After continuous stirring for 30 minutes, the composite initiator system was added dropwise into the reaction kettle respectively. After continuing the reaction for 2 hours, the temperature of the water bath was raised to 55° C., and the reaction was carried out for 1 hour.

[0049] Transfer the reaction system to a three-necked flask equipped with stirring, water s...

Embodiment 2

[0053] 40 parts of acrylamide, 4 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 2 parts of tert-butylacrylamide, 2 parts of hydroxyethyl cellulose, 0.05 parts of crosslinking agent, 0.02 parts of ethylenediamine Disodium tetraacetate was dissolved in 60 parts of water to form an aqueous solution. Dissolve 5 parts of emulsifier in cyclohexane to prepare an oil phase solution. Add the oil phase solution into the reaction kettle with a stirring rate of 500r / min, add the aqueous solution of the reaction system into the reaction kettle, pass inert gas protection, and the temperature of the water bath is 30°C. After continuous stirring for 30 minutes, the composite initiator system was added dropwise into the reaction kettle respectively. After continuing the reaction for 2 hours, the temperature of the water bath was raised to 55° C., and the reaction was carried out for 1 hour.

[0054] Transfer the reaction system to a three-necked flask equipped with stirring, water se...

Embodiment 3

[0058] 40 parts of acrylamide, 4 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 2 parts of tert-butylacrylamide, 2 parts of hydroxypropyl methylcellulose, 0.05 parts of crosslinking agent, 0.02 parts of ethyl Disodium diaminetetraacetic acid is dissolved in 60 parts of water to form an aqueous solution. Dissolve 5 parts of emulsifier in cyclohexane to prepare an oil phase solution. Add the oil phase solution into the reaction kettle with a stirring rate of 500r / min, add the aqueous solution of the reaction system into the reaction kettle, pass inert gas protection, and the temperature of the water bath is 30°C. After continuous stirring for 30 min, the composite initiator system was added dropwise into the reaction kettle respectively. After continuing the reaction for 2 hours, the temperature of the water bath was raised to 55° C., and the reaction was carried out for 1 hour.

[0059] Transfer the reaction system to a three-necked flask equipped with stirring, water...

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Abstract

The invention relates to a synthetic polyacrylamide polymer gel bead, and the main technical problem that the expansion speed of an existing polyacrylamide gel bead does not have the characteristic ofretarding dilatation is solved. The polyacrylamide polymer gel bead includes the following structural units of: acrylamide structural units, anionic monomer structural units or cationic monomer structural units, nonionic monomer structural units, cross-linker structural units and modified cellulose structural units, wherein a main chain structure of the polymer is composed of the acrylamide structural units, the anionic monomer structural units or cationic monomer structural units and the nonionic monomer structural units, a cross-linked structure is formed by the cross-linker structural units and the main chain of the polymer, and the modified cellulose structural units and the cross-linked structure interpenetrate to each other to form a network structure. Through the technical scheme,the problem is solved well, and the polyacrylamide polymer gel bead can be applied to an existing and traditional process of profile control and water plugging.

Description

technical field [0001] The invention relates to a synthetic polyacrylamide polymer gel particle, in particular to a polyacrylamide composite gel microsphere with a micron to millimeter size, which can be used as a profile control and water shutoff agent in tertiary oil recovery. Background technique [0002] Petroleum is known as the "blood of industry" and is one of the most important energy sources of modern industry. However, my country's dependence on foreign oil remains high, which is very detrimental to the country's long-term energy strategic security. my country's oilfields are mainly continental sedimentary oilfields with serious heterogeneity. All major oilfields have entered the stage of tertiary oil recovery. A large amount of water injection in the early stage of oil recovery has led to high water content in the reservoir and serious heterogeneity, which is easy to cause injection. Fluid escapes from the high-permeability layer into the production well, reducing ...

Claims

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Application Information

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IPC IPC(8): C08L33/26C08L1/28C08J3/12C08J3/24C08F220/56C08F220/58C08F220/54C09K8/508
CPCC08F220/56C08J3/12C08J3/246C08J2333/26C08J2401/28C08L33/26C08L2205/04C09K8/5083C08L1/284C08L1/286C08F220/54C08F220/585
Inventor 苏智青夏燕敏许汇宋晓芳朱益兴王兰
Owner CHINA PETROLEUM & CHEM CORP
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