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A kind of inorganic montmorillonite composite cross-linked polymer microsphere and its preparation method and application

A technology of cross-linked polymers and inorganic montmorillonite, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high cost, achieve good expansion, good strength and water absorption, and high plugging strength Effect

Inactive Publication Date: 2017-03-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the effect of field application of oilfield control and flooding, the cost of the current polymer microsphere performance is relatively high, and there is a certain gap with the demand

Method used

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  • A kind of inorganic montmorillonite composite cross-linked polymer microsphere and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The cross-linked polymer microspheres are further described below in conjunction with the examples.

[0028] Example 1

[0029] (1) Add 15g of montmorillonite to 15ml of water, stir for 50min, add 5ml of dimethyl diallyl ammonium chloride to 20ml of water, heat to 60°C, stir ultrasonically for 5h, filter the reactant with suction, and wash with hot ethanol aqueous solution Washing, filtering, washing until there is no chloride ion, drying the obtained product in a vacuum oven at 65°C to obtain a composite monomer of inorganic montmorillonite and dimethyl diallyl ammonium chloride, and crushing through a 200-mesh sieve ;

[0030] (2) Add 100g of cyclohexane and 3.0g of emulsifying dispersant into the reaction vessel, heat to 60°C, and stir for 30min;

[0031] (3) After neutralizing 14g of acrylic acid and 25% NaOH20ml in an ice-water bath, add 10g of acrylamide, 0.04g of crosslinking agent MBA, and 0.2g of crushed and sieved composite monomer, and ultrasonically disper...

Embodiment 2

[0036] (1) Add 15g of montmorillonite to 15ml of water, stir for 30min, add 5ml of dimethyl diallyl ammonium chloride to 20ml of water, heat to 70°C, stir ultrasonically for 3h, filter the reactant with hot ethanol Wash and filter the aqueous solution until there is no chloride ion, and dry the obtained product in a vacuum oven at 65°C to obtain a composite monomer of inorganic montmorillonite and dimethyl diallyl ammonium chloride, which is crushed through 200 mesh screen

[0037] (2) Add 100g of white oil and 4.0g of emulsifying dispersant into the reaction vessel, heat to 60°C, and stir for 60min.

[0038] (3) Neutralize 14g of acrylic acid and 25% NaOH in 22ml of ice-water bath, add 20g of acrylamide, 0.08g of cross-linking agent MBA, 1g of crushed and sieved composite monomer, and ultrasonically disperse for 60 minutes;

[0039] (4) After mixing (2) and (3), add 0.2g KPS-NaHS03, 0.02gAIBN, react for 3h;

[0040] (5) After the reaction is finished, the product is washed ...

Embodiment 3

[0043] (1) Add 15g of montmorillonite to 15ml of water, stir for 30min, add 5ml of dimethyl diallyl ammonium chloride to 20ml of water, heat to 80°C, stir ultrasonically for 4h, filter the reactant with suction, and wash with hot ethanol aqueous solution Washing, filtering, washing until there is no chloride ion, drying the obtained product in a vacuum oven at 65°C to obtain a composite monomer of inorganic montmorillonite and dimethyl diallyl ammonium chloride, and crushing through a 200-mesh sieve

[0044](2) Add 100g of cyclohexane and 7.0g of emulsifying dispersant into the reaction vessel, heat to 60°C, and stir for 30min;

[0045] (3) Neutralize 14g of acrylic acid and 25% NaOH in 24ml of ice-water bath, then add 20g of acrylamide, 0.12g of MBA, 2g of crushed and sieved composite monomer, and ultrasonically disperse for 60min;

[0046] (4) After mixing (2) and (3), add 0.1g KPS-NaHS03, 0.1g AIBN, and react with nitrogen for 5h;

[0047] (5) After the reaction is finishe...

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Abstract

The invention discloses an inorganic montmorillonoid composite cross-linked polymer microsphere, which comprises the following components in parts by weight: 0.1 to 10 parts of compound monomer, 10 to 50 parts of crylic acid monomer, 5 to 65 parts of acrylamide, 0.01 to 1 part of crosslink agent and 0.01 to 0.4 part of initiator; the initiator is a mixture of water-soluble initiator and oily initiator, and the compound monomer is the compound monomer of inorganic montmorillonoind and dimethyl diallyl ammonium chloride. The invention also provides a preparation method of the cross-linked polymer microsphere and an application of the prepared cross-linked polymer microsphere which is used as a profile control agent for sealing a high-permeability belt and a large pore in an oil reservoir in the oil field exploitation.

Description

technical field [0001] The invention relates to a polymer microsphere profile control and water shutoff material, in particular to an inorganic montmorillonite composite cross-linked polymer microsphere and its preparation method and application. Background technique [0002] In the 1990s, the cross-linked polymer solution deep profile control technology was greatly affected by oilfield sewage, and its application was limited to a certain extent. Among them, the microspheres polymerized by inverse microemulsion of acrylamide monomer are the most widely used in the oilfield field, and have achieved good results in field application. Judging from the effect of field application of oil field control and flooding, the cost of the current polymer microsphere performance is relatively high, and there is a certain gap with the demand. Inorganic substances are cheap, and the present invention intends to polymerize inorganic substances to form organic-inorganic polymer microspheres,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/56C08F2/44C08K3/34C09K8/42C09K8/588
Inventor 汪庐山刘承杰王涛靳彦欣胡秋平李再峰李福军衣哲史树彬赵丽
Owner CHINA PETROLEUM & CHEM CORP
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