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Preparation method of surfactant for oil recovery

A surfactant and acidic catalyst technology, applied in the direction of sulfonate preparation, chemical instruments and methods, and drilling compositions, can solve the problems of high oil displacement efficiency and low oil displacement efficiency, and achieve enhanced oil recovery , Improve salt resistance, high theoretical effect

Active Publication Date: 2016-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problem of low oil displacement efficiency of surfactants in the prior art under high temperature and high salt conditions. A new preparation method of surfactants for oil recovery is provided. The surface active agents prepared by the method are The active agent has the characteristics of high oil displacement efficiency under high temperature and high salt conditions

Method used

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  • Preparation method of surfactant for oil recovery
  • Preparation method of surfactant for oil recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Surfactant Preparation

[0024]a) Add 110 grams of nonylphenol, 1.5 grams of sodium hydroxide and 15 grams of water to a reactor equipped with a condensing device, a stirring device and a gas disperser, and heat to 85° C. while feeding nitrogen, and stir for 1 hour. Turn on the vacuum system, and at 90°C, vacuumize and dehydrate for 1 hour, then use nitrogen to blow 4 times to remove the air in the system, then adjust the system reaction temperature to 150°C and slowly feed 132 grams of ethylene oxide, The ethoxylation reaction was carried out by controlling the pressure to ≤0.40 MPa; after the reaction, the system was purged with nitrogen, neutralized and dehydrated after cooling to obtain 235 g of nonylphenol polyoxyethylene (6) ether.

[0025] b) Add 235 grams of nonylphenol polyoxyethylene ether (6) obtained in step a) into a reactor equipped with a stirring device, a condensation reflux device and a water separation device, add 250 milliliters of benzene and 40 ...

Embodiment 2

[0035] 1. Surfactant Preparation

[0036] a) Add 110 grams of nonylphenol, 1.5 grams of sodium hydroxide and 15 grams of water to a reactor equipped with a condensing device, a stirring device and a gas disperser, and heat to 85° C. while feeding nitrogen, and stir for 1 hour. Turn on the vacuum system, and at 90°C, vacuumize and dehydrate for 1 hour, then blow with nitrogen 4 times to remove the air in the system, then adjust the reaction temperature of the system to 150°C and slowly feed 44 grams of ethylene oxide, The ethoxylation reaction was carried out by controlling the pressure to ≤0.40 MPa; after the reaction, the system was purged with nitrogen, neutralized and dehydrated after cooling to obtain 148 g of nonylphenol polyoxyethylene (2) ether.

[0037] b) Add 148 grams of nonylphenol polyoxyethylene ether (2) obtained in step a) into a reactor equipped with a stirring device, a condensation reflux device and a water separation device, add 250 milliliters of benzene an...

Embodiment 3

[0042] 1. Surfactant Preparation

[0043] a) Add 110 grams of nonylphenol, 1.5 grams of sodium hydroxide and 15 grams of water to a reactor equipped with a condensing device, a stirring device and a gas disperser, and heat to 85° C. while feeding nitrogen, and stir for 1 hour. Turn on the vacuum system, and at 90°C, vacuumize and dehydrate for 1 hour, then use nitrogen to blow 4 times to remove the air in the system, then adjust the system reaction temperature to 150°C and slowly feed 88 grams of ethylene oxide, The ethoxylation reaction was carried out by controlling the pressure to ≤0.40 MPa; after the reaction, the system was purged with nitrogen, neutralized and dehydrated after cooling to obtain 192 g of nonylphenol polyoxyethylene (4) ether.

[0044] b) Add 192 grams of nonylphenol polyoxyethylene ether (4) obtained in step a) into a reactor equipped with a stirring device, a condensation reflux device and a water separation device, add 250 milliliters of benzene and 40 ...

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Abstract

The invention relates to a preparation method of a surface active agent for oil recovery to enhance crude oil recovery, which mainly solves the problem of low oil displacement efficiency under high-temperature and high-salt conditions in the prior art containing surfactant. The present invention is by adopting a kind of surface-active agent for oil displacement that improves oil recovery, its name is 3-(hydrocarbyl phenol polyoxyethylene ether)-2-(polyoxyethylene ether) propanesulfonate, structure such as formula (I ), wherein M is any one of alkali metal and alkaline earth metal, R is a C4-C20 hydrocarbon group, x=1-20, y=1-8, including 3-(hydrocarbylphenol polyoxyethylene ether)-2 -Hydroxypropanesulfonic acid reacts with the required amount of ethylene oxide to obtain the technical scheme of the surfactant, which better solves this problem and can be used in the enhanced oil recovery production of oilfields. (I).

Description

technical field [0001] The invention relates to a preparation method of a surfactant for oil recovery. Background technique [0002] After the oil field enters the high water cut period, the remaining oil is trapped in the pores of the reservoir rocks in a discontinuous oil film. The two main forces acting on the oil droplets are viscous force and capillary force. The agent system can reduce the interfacial tension between oil and water, so that the interfacial tension between oil and water in the reservoir can be reduced from 20 to 30mN / m to a low or ultra-low value (10 -3 ~10 -4 mN / m), it can reduce the resistance caused by the deformation of the oil droplets when the remaining oil is moved, thereby greatly improving the oil displacement efficiency. [0003] Surfactants modified by oil refining by-products such as petroleum sulfonate and heavy alkylbenzene sulfonate are the most widely used surfactants in oil recovery. This type of surfactant is characterized by a wide r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C303/32C07C309/10C08G65/331C09K8/584
Inventor 鲍新宁李应成张卫东沙鸥
Owner CHINA PETROLEUM & CHEM CORP