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A kind of preparation method of selective water blocking agent

A water-blocking agent and selective technology, which is applied in the field of preparation of selective water-blocking agents, can solve the problems of inability to further improve water-blocking performance and poor permeability, achieve long-term selective permeability and improve water-blocking performance. effect, bonding effect

Active Publication Date: 2021-05-28
苏州石为开环保材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: Aiming at the problem that the selective permeability of the traditional water shutoff agent is not good and the water shutoff performance cannot be further improved, a preparation method of the selective water shutoff agent is provided

Method used

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  • A kind of preparation method of selective water blocking agent

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example 1

[0021]Mix graphene oxide and N,N-dimethylformamide in a beaker at a mass ratio of 1:400, and ultrasonically disperse at a frequency of 55 kHz for 4 hours to obtain a graphene oxide dispersion. Mix it with organic amine in the flask at a mass ratio of 25:1, and add dicyclohexylcarboimide that is 0.05 times the mass of the graphene oxide dispersion into the flask, and ultrasonically disperse it at a frequency of 55kHz for 10 minutes. After stirring and reacting for 45 hours under the conditions of 130°C and 350r / min, the material in the flask was allowed to stand at room temperature for 30 hours, and then the supernatant liquid was removed to obtain a pre-modified graphene oxide mixture, which was filtered to obtain a pre-modified graphene oxide mixture. To obtain a filter cake, the filter cake was first washed with absolute ethanol for 6 times, then washed with water for 5 times, and dried for 3 hours at a temperature of 75°C to obtain pre-modified graphene oxide; pre-modified g...

example 2

[0023] Mix graphene oxide and organic solvent in a three-necked flask at a mass ratio of 1:30, and add organosilicon 6 times the mass of graphene oxide and water 0.3 times the mass of graphene oxide to the three-necked flask at a temperature of 35°C. After stirring and reacting for 50 hours at a rotating speed of 400r / min, the materials in the three-necked flask were allowed to stand at room temperature for 10 minutes, and then filtered to obtain a modified graphene oxide blank. The modified graphene oxide blank was sequentially washed with anhydrous toluene, n-hexane, After washing once each with ethanol, acetone, ethanol and water, and at a temperature of 70°C for 3 hours, modified graphene oxide was obtained; acrylamide and methyl silicate were mixed at a mass ratio of 2.0:1.0, and added to acrylic Add 2-acrylamide-2-methylpropanesulfonic acid with 0.7 times the quality of acrylamide to the mixture of amide and methyl silicic acid, dimethyl diallyl ammonium chloride with 0.2...

example 3

[0025] Mix acrylamide and methyl silicic acid at a mass ratio of 2.0:1.0, and add 2-acrylamide-2-methylpropanesulfonic acid and acrylamide 0.7 times the mass of acrylamide to the mixture of acrylamide and methyl silicic acid 0.25 times the mass of dimethyl diallyl ammonium chloride and 12 times the mass of acrylamide N,N-dimethylformamide were stirred and mixed for 30 minutes at a temperature of 40°C and a rotational speed of 400r / min. The pretreatment mixed solution is obtained; the pretreatment mixed solution and the silane coupling agent are mixed in the reactor at a mass ratio of 100:1, and graphene oxide 0.09 times the mass of the pretreated mixed solution is added to the reactor, and the pretreated mixed solution is Epoxidized soybean oil with a mass of 0.02 times and a catalyst with a mass of 0.009 times the pretreatment mixed solution were stirred and mixed for 30 minutes at a temperature of 40°C and a rotational speed of 400r / min, and then 0.03 times the mass of the pr...

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Abstract

The invention discloses a preparation method of a selective water shutoff agent, which belongs to the technical field of polymer materials. Mix the pretreatment mixed solution with the silane coupling agent at a mass ratio of 80:1 to 100:1, and add modified graphene oxide of 0.03 to 0.09 times the mass of the pretreatment mixed solution, and 0.01 to 0.02 times the mass of the pretreated mixed solution Epoxidized soybean oil and a catalyst with a mass of 0.008 to 0.009 times the mass of the pretreatment mixed solution are stirred and mixed, and an initiator with a mass of 0.01 to 0.03 times the mass of the pretreated mixed solution is added. After stirring and reacting, a raw material mixture is obtained, and the raw material mixture is suction filtered and washed , dried and crushed to obtain a selective water shutoff agent. The selective water shutoff agent obtained in the invention has excellent selective permeability and water shutoff performance.

Description

technical field [0001] The invention discloses a preparation method of a selective water blocking agent, which belongs to the technical field of polymer materials. Background technique [0002] The water shutoff agent in the water shutoff process refers to a substance that is injected into the formation through a water well or an oil well, so that it can play its own role and can greatly reduce the water output in the oil and gas well. Nowadays, chemical reagents are the most widely used and most effective oil well water shutoff agents in water shutoff operations, that is, the chemical reagents used in oil well water shutoff operations can be injected through oil wells and can also reduce the water output of oil wells. With the continuous use of oil well water shutoff agents in oil fields, water shutoff agents have been fully developed, which is of great significance to the water injection development of oil and gas fields. [0003] After decades of development, the applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508C08F220/56C08F220/58C08F226/02
CPCC08F220/56C09K8/5083C08F220/585C08F226/02
Inventor 吴江勇裴文韬刘侠朱东东
Owner 苏州石为开环保材料科技有限公司
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