Foam sealing channeling composition, preparation method thereof and applications thereof

A technology of composition and foam, which is applied in the direction of drilling composition, chemical instruments and methods, earthwork drilling and mining, etc., can solve the problems of poor plugging effect and gas channeling, achieve the purpose of suppressing gas channeling, reducing surface tension, and easy The effect of forming and stabilizing foam

Active Publication Date: 2014-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is the problem of gas channeling caused by the poor p...

Method used

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  • Foam sealing channeling composition, preparation method thereof and applications thereof
  • Foam sealing channeling composition, preparation method thereof and applications thereof
  • Foam sealing channeling composition, preparation method thereof and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 90g dodecylamine and 0.3% potassium hydroxide of amine weight to the reaction kettle, add 450g ethylene oxide, and react at 200°C for 1 hour; then add 60g sodium chloroacetate, continue to react at 50°C for 20 hours, and finally add hydrochloric acid Neutralize to pH <3, stand for stratification, add 30% by weight NaOH aqueous solution to the oil phase for neutralization to obtain anionic-nonionic foaming agent.

[0028] Dissolve dodecyl ammonium chloride and the anionic-nonionic foaming agent prepared by the present invention separately in water, stir for 30 minutes to prepare a 0.5% by weight aqueous solution, and then adjust the above-mentioned foaming agent to cationic: anionic-nonionic foaming agent mole Mix evenly at a ratio of 1:8 to obtain foaming agent composition 1, whose composition and structure are shown in Table 1.

[0029] The above-mentioned composition is mixed with the gas driving gas to form the desired foam channeling composition.

[0030]

Embodiment 2

[0032] Put 140g of eicosamine and 1% potassium hydroxide by weight of amine into the reactor, add 180g of ethylene oxide and 67g of propylene oxide, and react at 200°C for 10 hours; then add 90g of sodium chloroacetate and continue the reaction at 80°C. 8 Hours, finally add hydrochloric acid to neutralize to pH <3, stand for stratification, add 30% by weight NaOH aqueous solution to the oil phase for neutralization to obtain anionic-nonionic foaming agent.

[0033] The octadecylammonium bromide and the anionic-nonionic foaming agent prepared by the present invention were separately dissolved in water, stirred for 30 minutes to prepare a 0.5% by weight aqueous solution, and then the above-mentioned foaming agent was cation: anionic-nonionic foaming agent mole Mix evenly at a ratio of 1:10 to obtain foaming agent composition 2. Its composition and structure are shown in Table 1.

[0034] The above composition is mixed with the gas for gas drive to form the desired foam channeling sys...

Embodiment 3

[0037] Add 75g decylamine and 3% potassium hydroxide by weight of amine into the reaction kettle, add 315g ethylene oxide, 151g propylene oxide, and react at 150°C for 3 hours; then add 195g Br(CH 2 ) 5 COOH, continue to react at 100℃ for 1 hour, and finally add hydrochloric acid to neutralize to pH 3 ) 2 The aqueous solution is neutralized to obtain an anionic-nonionic foaming agent.

[0038] The tetradecyl ammonium chloride and the anionic-nonionic foaming agent prepared by the present invention are separately dissolved in water and stirred for 30 minutes to prepare a 0.5% by weight aqueous solution, and then the above-mentioned foaming agent is cation: anionic-nonionic foaming agent mole Mix evenly at a ratio of 1:1.4 to obtain foam composition 3, whose composition and structure are shown in Table 1.

[0039] The above composition is mixed with the gas for gas drive to form the desired foam channeling system.

[0040]

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Abstract

The invention relates to a foam sealing channeling composition, a preparation method thereof and applications thereof, mainly solving a gas channeling problem in gas-drive oil recovery processes at present. According to the technical scheme, the foam sealing channeling composition, the preparation method thereof and the applications thereof are adopted, wherein the foam sealing channeling composition comprises a cationic foaming agent, an anion-nonionic foaming agent and gas; the cationic foaming agent, the anion-nonionic foaming agent and the gas are mixed to form foams; the cationic foaming agent is any one of a quaternary ammonium salt and a quaternary amine alkali; the anion-nonionic foaming agent is any one of fatty alcohol polyoxyethylene/polypropylene ether carboxylate or fatty alcohol polyoxyethylene ether/polypropylene ether sulfonate; the gas is any one that has an inert relationship with the foaming agents; the molar ratio of the cationic foaming agent to the anion-nonionic foaming agent is 1:0.01-100; and the volume ratio of the gas to the liquid is 0.1-10:1. By the technical scheme, the problem is solved well and the foam sealing channeling composition can be used in enhanced oil recovery processes of an oil field.

Description

Technical field [0001] The invention relates to a foam channeling composition and a preparation method and application thereof. Background technique [0002] my country’s major oil fields have entered a period of high water cut after primary and secondary exploitation. How to improve the oil recovery rate and maximize the development of remaining reserves has become an important task for the petroleum industry. Gas flooding is one of the most effective methods used in complex oil reservoirs, especially difficult-to-exploit oil reservoirs to increase oil recovery. However, in the process of gas displacement, there are serious technical problems, that is, due to the high viscosity contrast between underground crude oil and injected gas, which leads to unfavorable mobility ratios, leading to early gas breakthroughs, and reducing the oil layer sweep coefficient; and because of the reservoir The heterogeneity of oil, especially when there are cracks or large pores, will cause serious...

Claims

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Application Information

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IPC IPC(8): C09K8/42E21B43/22
CPCC09K8/493C09K8/594
Inventor 何秀娟高磊沙鸥吴国英
Owner CHINA PETROLEUM & CHEM CORP
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