A kind of instant polyacrylamide and preparation method thereof

A technology of polyacrylamide and acrylamide, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as short curing time, and achieve the effects of good solubility, uniform chain growth, and gentle polymerization reaction speed
CN105085801BActive Publication Date: 2018-06-19华鼎鸿基采油技术服务(北京)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
华鼎鸿基采油技术服务(北京)有限公司
Publication Date
2018-06-19

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Abstract

The invention provides a polyacrylamide and a preparation method thereof, comprising: A) under the condition that a redox initiator system and an azo initiator exist, acrylamide, a carboxyl group-containing monomer and a sulfonic acid group-containing Group monomers react to obtain polyacrylamide. Compared with the prior art, the present invention introduces hydrophilic groups containing carboxyl groups and sulfonic acid groups into polyacrylamide, which can enhance the solubility of the polymer; meanwhile, it adopts a compound initiator system and completes the polymerization by means of high and low temperature segmental initiation The reaction uses a combination of a redox initiator with a lower activation energy and an azo initiator with a higher activation energy to release free radicals in stages at different reaction temperatures, so that the free radicals maintain a certain concentration, and the polymerization reaction speed is gentle and easy to control , which is conducive to uniform and smooth chain growth, fully improves the initiation efficiency, and obtains high molecular polymers with better solubility.
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Description

technical field

[0001] The invention belongs to the technical field of polymer compounds, and in particular relates to an instant polyacrylamide and a preparation method thereof. Background technique

[0002] Polymer flooding is a flooding method that injects a water-soluble polymer solution into the oil reservoir. By increasing the viscosity of the injected water and improving the mobility ratio, the affected area of ​​the displacement phase can be effectively increased, and the oil saturation can be reduced to increase oil recovery. yield. The polymer injected into the oil layer will have two important effects: one is to increase the viscosity of the water phase, and the other is to reduce the permeability of the oil layer due to the retention of the polymer. The result of the combined effect of the two aspects is that the fluidity of the polymer aqueous solution in the oil layer is significantly reduced. Therefore, after the polymer is injected into the oil layer, there...

Claims

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