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Nanoparticle enhanced low-interfacial-tension foam system and preparation method thereof

A technology of interfacial tension and nanoparticles, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of poor salt resistance and shear resistance of polymers, adverse effects of foam foamability, and reduce foam foaming Volume and other issues, to achieve the effect of long foam stability time, conducive to sustainable mining, and reduce interfacial tension

Inactive Publication Date: 2018-01-09
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the stability of the foam in the application, a certain amount of polymer is often added as a foam stabilizer, but the addition of the polymer will reduce the foam volume of the foam, which will have an adverse effect on the foamability of the foam, and the polymer’s Salt resistance and shear resistance are poor, and polymer residues can cause damage to the formation

Method used

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  • Nanoparticle enhanced low-interfacial-tension foam system and preparation method thereof
  • Nanoparticle enhanced low-interfacial-tension foam system and preparation method thereof
  • Nanoparticle enhanced low-interfacial-tension foam system and preparation method thereof

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Embodiment 1

[0057] A nanoparticle-enhanced low interfacial tension foam system consists of the following components by weight percentage:

[0058]

[0059] Described cationic surfactant is made of dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide, octadecyl trimethyl ammonium bromide Ammonium is mixed according to the mass ratio of 1:2:1:2;

[0060] Described stabilizer is made of modified nano-SiO 2 , modified nano-MgO, modified nano-TiO 2 Mixed according to the mass ratio of 1:1:1;

[0061] Described polymerization inhibitor is sodium citrate;

[0062] Described auxiliary agent is that ethylene glycol and lauryl alcohol are formed by mixing in a mass ratio of 1:1;

[0063] The mineralized water is prepared by mixing 10000g of water, 85g of sodium chloride, 8.5g of anhydrous calcium chloride and 11.6g of anhydrous magnesium sulfate in parts by mass.

[0064] The preparation method of the nanoparticle-enhanced low inter...

Embodiment 2

[0070] A nanoparticle-enhanced low interfacial tension foam system consists of the following components by weight percentage:

[0071]

[0072] Described cationic surfactant is made of dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide, octadecyl trimethyl ammonium bromide Ammonium is mixed according to the mass ratio of 1:1:1:1;

[0073] Described stabilizer is made of modified nano-SiO 2 , modified nano-MgO, modified nano-TiO 2 Mixed according to the mass ratio of 1:1:1;

[0074] Described polymerization inhibitor is sodium citrate;

[0075] Described auxiliary agent is that ethylene glycol and lauryl alcohol are formed by mixing in a mass ratio of 1:1;

[0076] The mineralized water is prepared by mixing 10000g of water, 95g of sodium chloride, 12.5g of anhydrous calcium chloride and 15.6g of anhydrous magnesium sulfate in parts by mass.

[0077] The preparation method of the nanoparticle-enhanced low inte...

Embodiment 3

[0083] A nanoparticle-enhanced low interfacial tension foam system consists of the following components by weight percentage:

[0084]

[0085] The cationic surfactant is mixed with dodecyltrimethylammonium bromide, tetradecyltrimethylammonium bromide and octadecyltrimethylammonium bromide in a mass ratio of 1:2:3 made;

[0086] Described stabilizer is made of modified nano-SiO 2 , modified nano-TiO 2 Mixed according to the mass ratio of 1:1;

[0087] Described polymerization inhibitor is sodium citrate;

[0088] Described auxiliary agent is that ethylene glycol and lauryl alcohol are formed by mixing in a mass ratio of 1:1;

[0089] The mineralized water is prepared by mixing 10000g of water, 90g of sodium chloride, 10.5g of anhydrous calcium chloride and 13.6g of anhydrous magnesium sulfate in parts by mass.

[0090] The preparation method of the nanoparticle-enhanced low interfacial tension foam system of the present invention comprises the following steps:

[0091...

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Abstract

The invention discloses a nanoparticle enhanced low-interfacial-tension foam system and a preparation method thereof. The foam system comprises the following components by weight percent: 0.2-0.8% ofa cationic surface active agent, 0.01-0.1% of a stabilizer, 0.5-1.0% of a polymerization inhibitor, 0.3-1.0% of an additive and the balance of mineralized water, wherein the cationic surface active agent is selected from dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide and stearyl trimethyl ammonium bromide; the stabilizer is selectedfrom modified nano-SiO2, modified nano-MgO and modified nano-TiO2; the polymerization inhibitor is sodium citrate; the additive is selected from ethylene glycol and dodecanol; the mineralized water isa mixed water solution of sodium chloride, anhydrous calcium chloride and anhydrous magnesium sulfate. The nanoparticle enhanced low-interfacial-tension foam system is good in foaming performance andfoam stabilizing performance, high in interfacial activity, cheap and easily accessible in raw material, simple in preparation method and excellent in foam combination performance.

Description

technical field [0001] The invention relates to the technical field of oil field chemical application, in particular to a nano particle reinforced low interfacial tension foam system and a preparation method thereof. Background technique [0002] Most of my country's oilfields have entered the period of medium and high water cut, or even very high water cut period, the output is decreasing year by year, and the contradiction of development is becoming more and more prominent. Judging from the current characteristics of oil reservoirs in my country, chemical flooding is an effective tertiary recovery method. Chemical flooding includes polymer flooding, alkali flooding, surfactant flooding and compound flooding (binary compound flooding and triple compound flooding). Injecting polymer can improve the mobility ratio, increase the swept volume of injected water, and improve the development effect of heterogeneous reservoirs, but the high-permeability strips still cause the poly...

Claims

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Application Information

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IPC IPC(8): C09K8/594C09K8/584
Inventor 田磊贺美林岩
Owner YANGTZE UNIVERSITY
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