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A kind of poss-based hybrid pre-crosslinked gel particles and preparation method thereof

A gel particle and pre-crosslinking technology, applied in the field of petroleum exploitation, can solve the problems of inability to effectively block high-permeability layers, poor stability, etc. Effect

Active Publication Date: 2019-04-16
山东聚星石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that conventional polyacrylamide polymers or biological polymers cannot effectively block the high-permeability layer without the use of cross-linking agents, and the gel system directly To block the hyperpermeable layer, and the disadvantages of poor stability of conventional polyacrylamide gel particles under high-temperature and high-salt reservoir conditions, a POSS-based hybrid pre-crosslinked gel particle is provided

Method used

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  • A kind of poss-based hybrid pre-crosslinked gel particles and preparation method thereof
  • A kind of poss-based hybrid pre-crosslinked gel particles and preparation method thereof
  • A kind of poss-based hybrid pre-crosslinked gel particles and preparation method thereof

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Embodiment 1

[0032] A POSS-based hybrid pre-crosslinked gel particle, made of the following raw material components: 17g acrylamide, 5g diacetone acrylamide, 3g methacryloyl chloride modified nonylphenol polyoxyethylene ether, 0.01g octane Vinyl clathrate silsesquioxane, 0.1 g sodium lauryl sulfate, 0.0001 g ammonium persulfate, 75 g deionized water.

[0033] Preparation process: Add 0.01g octavinyl clathrate silsesquioxane and 0.1g sodium lauryl sulfate into 75g deionized water, stir until the solution is colorless and clear; then add 17g acrylamide, 5g diacetone propylene Amide and 3g of methacryloyl chloride modified nonylphenol polyoxyethylene ether were added to the solution, and stirred evenly to form a colorless transparent aqueous solution; the aqueous solution was added to a three-necked flask, and nitrogen gas was passed for 30 minutes to remove the solution and the air in the flask. Then add 0.0001g of potassium persulfate and stir evenly, continue to pass nitrogen for 30 minute...

Embodiment 2

[0035] A POSS-based hybrid pre-crosslinked gel particle, made of the following raw material components: 17g acrylamide, 5g diacetone acrylamide, 3g methacryloyl chloride modified nonylphenol polyoxyethylene ether, 0.01g octane Vinyl clathrate silsesquioxane, 0.1 g sodium lauryl sulfate, 0.0001 g ammonium persulfate, 75 g deionized water.

[0036] Preparation process: Add 0.01g octavinyl clathrate silsesquioxane and 0.1g sodium lauryl sulfate into 75g deionized water, stir until the solution is colorless and clear; then add 17g acrylamide, 5g diacetone propylene Amide and 3g of methacryloyl chloride modified nonylphenol polyoxyethylene ether were added to the solution, and stirred evenly to form a colorless transparent aqueous solution; the aqueous solution was added to a three-necked flask, and nitrogen gas was passed for 30 minutes to remove the solution and the air in the flask. Then add 0.0001g of potassium persulfate and stir evenly, continue to pass nitrogen for 30 minute...

Embodiment 3

[0038] A POSS-based hybrid pre-crosslinked gel particle made from the following raw material components: 15g acrylamide, 5g diacetone acrylamide, 5g methacryloyl chloride modified nonylphenol polyoxyethylene ether, 0.01g octane Vinyl clathrate silsesquioxane, 0.1 g sodium lauryl sulfate, 0.0001 g azobisisobutylamidine hydrochloride, 75 g deionized water.

[0039]Preparation process: Add 0.01g octavinyl clathrate silsesquioxane and 0.1g sodium lauryl sulfate into 75g deionized water, stir until the solution is colorless and clear; then add 15g acrylamide, 5g diacetone propylene Amide and 5g of methacryloyl chloride modified nonylphenol polyoxyethylene ether were added to the solution, and stirred evenly to form a colorless transparent aqueous solution; the aqueous solution was added to a three-necked flask, and nitrogen gas was passed for 30 minutes to remove the solution and the air in the flask. Then add 0.0001g of azobisisobutylamidine hydrochloride and stir evenly, continue...

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Abstract

The invention discloses POSS base hybridized pre-crosslinked gel particles. The gel particles are prepared by inducing polymerization and crosslinking reactions on raw material components: acrylamide,diacetone-acryloamide, methacryloyl chloride modified nonylphenol polyoxyethylene ether and octavinyl cage-like silsesquioxane under the action of an initiator. A preparation method comprises the following steps: (1) dissolving acrylamide, diacetone-acryloamide, methacryloyl chloride modified nonylphenol polyoxyethylene ether, octavinyl cage-like silsesquioxane and lauryl sodium sulfate in waterto obtain a colorless transparent aqueous solution; (2) introducing nitrogen into the aqueous solution to remove oxygen and adding the initiator, and heating the mixture to 30-50 DEG C; (3) keeping the temperature for 5 hours after heating when the system temperature is continuously raised to the maximum value to obtain a gel colloid; and (4) cutting, granulating and drying the gel colloid to obtain a target product. By adding the POSS base into the gel particles, the characteristics that conventional hydrogel system is not uniform in morphology, poor in mechanical property, small in pore diameter of network structure of the gel and the like are improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and relates to a pre-crosslinked gel particle used for oil reservoir control and flooding, in particular to a POSS-based hybrid pre-crosslinked gel particle and a preparation method thereof. Background technique [0002] After long-term water injection development in most oilfields in my country, the physical properties of the reservoirs have changed greatly, especially the formation of high permeability and large pore formations, which has increased the average permeability of water-flooded formations, appeared channeling channels, and the fingering phenomenon is obvious. When the coefficient decreases, the water flooding effect becomes worse, the water cut of the oil well rises rapidly, and the oil recovery rate decreases rapidly. In order to reduce water flooding channeling and improve water flooding efficiency, a common technical measure is to inject chemical systems into water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F283/12C08F220/56C08F222/38
CPCC08F283/065C08F283/124C08F220/56
Inventor 蒲万芬杜代军金发扬蒲勇刘锐
Owner 山东聚星石油科技有限公司