Surfactant composition and use thereof

A surfactant and composition technology, applied in the field of surfactant composition, can solve problems such as corrosion of equipment and pipelines, damage to formations and oil wells, poor oil displacement efficiency, etc., to achieve reduced usage, easy degradation, and enhanced temperature resistance performance effect

Active Publication Date: 2008-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] One of the technical problems to be solved by the present invention is that the surfactant-containing compositions in the prior art have poor oil displacement efficiency under high-temperature and high-salt conditions. The problem of high production cost provides a new surfactant composition

Method used

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  • Surfactant composition and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Synthesis of sodium octadecanoic acid polyoxyethylene (6) ether sulfonate

[0038] (1) Add 142 grams (about 0.5 moles) of octadecanoic acid and 1.5 grams of calcium oxide to a reactor equipped with a condensing device, a stirring device and a gas disperser, and when heating to 135 ° C while passing nitrogen gas, add octadecanoic acid Acid 14% by weight of water, stirred for 1 hour. Then first distill water at normal pressure, then decompress under 20 mm Hg vacuum, vacuumize at 140°C for 20 minutes to evaporate moisture, cool the solution to 80°C, slowly add 20% by weight of the theoretical acid amount of the neutralization catalyst of concentrated sulfuric acid. Heat the system temperature to 85-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then use nitrogen to blow 3-4 times to remove the air in the system, then adjust the reaction temperature of the system to 150°C Enter 135 grams of ethylene oxide, control pressure≤0.40MPa to carry out al...

Embodiment 2

[0044] (1) Add 228 grams (1.0 moles) of tetradecanoic acid and 2.5 grams of calcium oxide to a reactor equipped with a condensing device, a stirring device and a gas disperser, and when heating to 135 ° C while passing nitrogen, add 25 grams of water and stir React for 1 hour. Then first distill water at normal pressure, then depressurize under 20 mm Hg vacuum, vacuumize at 140° C. for 20 minutes to remove moisture, cool the solution to 80° C., and slowly add 0.8 grams of concentrated sulfuric acid dropwise. Heat the system temperature to 85-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then use nitrogen to blow 3-4 times to remove the air in the system, then adjust the reaction temperature of the system to 150°C Add 180 grams of ethylene oxide, control the pressure ≤ 0.40MPa to carry out the alkoxylation reaction; after the reaction, purging the system with nitrogen to remove unreacted ethylene oxide, neutralize, decolorize, filter, and dehydrate af...

Embodiment 3

[0050] (1) Add 100 grams (0.5 moles) of dodecanoic acid and 1.0 gram of calcium oxide in the reactor equipped with condensing device, stirring device and gas disperser, when heating to 135 ℃ while flowing nitrogen, add 10 grams of water, The reaction was stirred for 1 hour. Then first distill water at normal pressure, then decompress under 20 mm Hg vacuum, vacuumize at 140°C for 20 minutes to evaporate moisture, cool the solution to 80°C, slowly add 20% by weight of the theoretical acid amount of the neutralization catalyst of concentrated sulfuric acid. Heat the system temperature to 85-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then use nitrogen to blow 3-4 times to remove the air in the system, then adjust the reaction temperature of the system to 150°C Add 68 grams of ethylene oxide, control the pressure ≤ 0.40MPa to carry out alkoxylation reaction; after the reaction, use nitrogen to sweep the system to remove unreacted ethylene oxide, neutr...

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Abstract

The invention relates to surface active agent combination and the application of the combination which solve the disadvantages of bad displacement efficiency under the condition of high temperature and high salt, bringing harm to the strata due to the containing of alkali, equipment and channel corrosion and high production cost found in the oil displacement agent which contains surface active agent in the prior art. The surface active agent combination and the application of the combination solves the problem through the technical proposal of the surface active agent combination which contains fatty alcohol-polyoxyethylene ether sulfonates, polymers and water; the surface active agent combination is applicable to the tertiary oil recovery production of the oil field.

Description

technical field [0001] The present invention relates to a surfactant composition and its application. Background technique [0002] Judging from the reserves and exploitation of my country's oil resources, my country's Daqing, Shengli, Zhongyuan, Huabei, Dagang and other large oil fields are all in the middle and late stage of exploitation, and the water content of the produced oil is as high as 90%, and they have entered into the use of enhanced oil recovery (EOR) technology In the tertiary oil recovery stage, enhanced oil recovery has become an important strategic measure of my country's oil industry. Among them, chemical flooding is one of the main methods of tertiary oil recovery. [0003] In the chemical flooding technology of tertiary oil recovery, whether it is the current surfactant flooding (micelle flooding, microemulsion flooding), or the most promising composite flooding (alkali + surfactant + polymer), it is inseparable from Open to choose the appropriate surfa...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/588
Inventor 张卫东沙鸥杨一青陈荣福
Owner CHINA PETROLEUM & CHEM CORP
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