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Method for producing polyacrylamide microsphere water shutoff agent

A technology of polyacrylamide and manufacturing method, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of unfriendly environment, complex preparation method, uneven particle size of products, etc., and achieve environmental friendliness and simple process , swelling rate and the effect of improving salt resistance

Inactive Publication Date: 2015-04-15
北京希涛技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, additives such as kerosene and chelating agent were added in the preparation process of the water blocking agent, and a complicated preparation method was adopted, and the cross-linking agent used harmful reagents such as formaldehyde, which was not friendly to the environment, and the prepared The particle size of the product is not uniform

Method used

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  • Method for producing polyacrylamide microsphere water shutoff agent
  • Method for producing polyacrylamide microsphere water shutoff agent
  • Method for producing polyacrylamide microsphere water shutoff agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Weigh the raw materials by weight ratio, wherein the ratio of raw materials is: acrylamide 15wt%, 2-acrylamide-2-methylpropanesulfonate sodium anti-salt monomer 15wt%, N, N-methylenebisacryloyl 0.025wt %, Span 8010wt%, potassium persulfate 0.15wt%, cyclohexane 30wt%, deionized water 10wt%; at room temperature, add Span 80 dispersant in a container equipped with a thermometer, agitator, and condensing reflux device and cyclohexane, stir and mix evenly to form solution A; dissolve acrylamide monomer, salt-resistant monomer, N,N-methylenebisacryloyl in deionized water, and add potassium persulfate initiator after it is completely dissolved , stir until potassium persulfate is completely dissolved, the stirring speed is 150r / min, and the dissolved mixed solution is added to the solution A of step 2); the container is placed in a constant temperature water bath at 40°C, and under the protection of nitrogen, slowly add a concentration of 10 % sodium bisulfite aqueous solution...

Embodiment 2

[0046] Weigh the raw materials by weight ratio, wherein the ratio of raw materials is: 25wt% of acrylamide, 5wt% of salt-resistant monomer of sodium 2-acrylamide-2-methylpropanesulfonate, 0.05wt of N,N-methylenebisacryloyl %, Span 8025wt%, potassium persulfate 0.1wt%, cyclohexane 30wt%, deionized water 5wt%; at room temperature, add Span 80 dispersant in a container equipped with a thermometer, agitator, and reflux device and cyclohexane, stir and mix evenly to form solution A; dissolve acrylamide monomer, salt-resistant monomer, N,N-methylenebisacryloyl in deionized water, and add potassium persulfate initiator after it is completely dissolved , stirred until the potassium persulfate was completely dissolved, the stirring speed was 200r / min, and the dissolved mixed solution was added to the solution A of step 2); the container was placed in a constant temperature water bath at 37°C, and under the protection of nitrogen, slowly added a concentration of 10 % sodium bisulfite aq...

Embodiment 3

[0048] Weigh raw materials according to weight ratio, wherein the ratio of raw materials is: acrylamide monomer 18wt%, N-vinylpyrrolidone anti-salt monomer 10wt%, N, N-methylenebisacryloyl 0.03wt%, Span 8015wt% , potassium persulfate 0.2wt%, cyclohexane 40wt%, deionized water 10wt%; at room temperature, add Span 80 dispersant and cyclohexane in the container equipped with thermometer, stirrer, condensing reflux device, stir Mix evenly to form solution A; dissolve acrylamide monomer, salt-resistant monomer, N,N-methylenebisacryloyl in deionized water, add potassium persulfate initiator after it is completely dissolved, and stir until potassium persulfate Completely dissolve, the stirring speed is 300r / min, add the dissolved mixed solution into solution A of step 2); place the container in a constant temperature water bath at 43°C, and slowly add sodium bisulfite with a concentration of 10% under nitrogen protection The aqueous solution is used as a reducing initiator, and the a...

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Abstract

The invention discloses a method for producing a polyacrylamide microsphere water shutoff agent. The method comprises the following steps: weighing raw materials of acrylamide, salt tolerance monomers, N and N-methylene-bis-acrylyl, span 80, potassium persulfate, hexamethylene and deionized water; stirring and mixing a dispersing agent and the hexamethylene in a polymerizable monomer; and performing initiation and polymerizing to form the water shutoff agent. Compared with the prior art, the method process of the invention is simple and environmental-friendly, the particle diameter of the polyacrylamide microsphere water shutoff agent is controlled in the particle size range within 8-175 Mum, the maximum oil reservoir temperature can reach 170 DEG C, swelling rate and the salt tolerance performance are significantly improved, and the plugging problem of injected liquid in the more-than-ten-meter depth profile control can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of oil field exploitation chemicals, and in particular relates to a polyacrylamide microsphere water shutoff agent and a manufacturing method of the water shutoff agent. Background technique [0002] Polyacrylamide and its derivatives are a class of water-soluble polymers with a wide range of uses, which can be used as flocculants, paper strengthening agents, fluid loss control agents, etc., and have been widely used in water treatment, papermaking, oil exploration and other fields. Generally, its cross-linked polymer can be used as soil water retention agent, physiological hygienic water absorption material and oilfield water shutoff agent due to its properties of water absorption, water retention and swelling. Among them, the water blocking agent refers to the substance that is injected into the formation from oil and water wells and can reduce the water produced by the formation. The water blocking agent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/58C08F226/10C08F212/14C08F222/40C08F222/38C08F2/32C08F4/40C09K8/42
Inventor 郝春玲唐富刚
Owner 北京希涛技术开发有限公司
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