Composition capable of greatly improving crude oil recovery efficiency and preparation method thereof

A composition and recovery technology, applied in the field of composition and its preparation that can greatly increase oil recovery, can solve problems such as fouling damage, high use concentration, and alkali corrosion in ASP flooding, and achieve The ability to reduce interfacial tension, good technical effect, and the effect of enhancing oil recovery

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the oil displacement agents containing surfactants in the prior art have poor oil displacement efficiency, high use conc...

Method used

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  • Composition capable of greatly improving crude oil recovery efficiency and preparation method thereof
  • Composition capable of greatly improving crude oil recovery efficiency and preparation method thereof
  • Composition capable of greatly improving crude oil recovery efficiency and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031](1) Add 93g (0.5 mole) dodecyl alcohol and the calcium oxide catalyst of alcohol weight 1% in the reactor that condensing device, stirring device and gas disperser are housed, when heating to 135 ℃ while flowing nitrogen, add 8 grams water, stirred for 1 hour. Then first distilled water at normal pressure, then decompressed under 20 mm Hg vacuum, evaporated moisture at 140 DEG C in vacuum for 20 minutes, cooled the solution to 80 DEG C, slowly added dropwise neutralizing catalyst theoretical acid amount of 20% by weight concentrated sulfuric acid. Heat the system temperature to 80-90°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 70g oxirane, control pressure<0.60MPa and carry out alkoxylation reaction; After the reaction finishes, purging system with nitrogen, removes unreacted oxirane, after cooling, neutralize, ...

Embodiment 2

[0037] (1) Add the calcium oxide catalyst of 135g (0.5 mole) stearyl alcohol and alcohol weight 1% in the reactor that condensing device, stirring device and gas disperser are housed, when heating to 135 ℃ while flowing nitrogen, add 10g water , and stirred for 1 hour. Then first distilled water at normal pressure, then decompressed under 20 mm Hg vacuum, evaporated moisture at 140 DEG C in vacuum for 20 minutes, cooled the solution to 80 DEG C, slowly added dropwise neutralizing catalyst theoretical acid amount of 20% by weight concentrated sulfuric acid. Heat the system temperature to 80-90°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 155g oxirane, control pressure<0.60MPa and carry out alkoxylation reaction; After the reaction finishes, purging system with nitrogen gas, removes unreacted oxirane, after cooling, neut...

Embodiment 3

[0043] (1) add the calcium oxide catalyst of 94g (0.5 moles) coconut oil alcohol and alcohol weight 1% in the reactor that condensing unit, agitator and gas disperser are housed, when heating to 135 ℃ while logical nitrogen, add 8g water , and stirred for 1 hour. Then first distilled water at normal pressure, then decompressed under 20 mm Hg vacuum, evaporated moisture at 140 DEG C in vacuum for 20 minutes, cooled the solution to 80 DEG C, slowly added dropwise neutralizing catalyst theoretical acid amount of 20% by weight concentrated sulfuric acid. Heat the system temperature to 80-90°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 155g oxirane, control pressure<0.60MPa and carry out alkoxylation reaction; After the reaction finishes, purging system with nitrogen gas, removes unreacted oxirane, after cooling, neutralize...

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Abstract

The invention relates to a composition capable of greatly improving crude oil recovery efficiency and a preparation method thereof, which mainly solve the problems in the prior art that the oil-displacing agent containing a surface active agent has poor oil displacement efficiency and high application concentration and alkali in alkaline-surfactant-polymer flooding brings corrosion and dirt harm on stratum and oil wells. By adopting the technical scheme of the surface active agent composition comprising fatty alcohol polyoxyethylene ether benzene sulfonate, polymer and water, the problems canbe well solved, and the composition can be used in tertiary recovery of an oil field.

Description

technical field [0001] The invention relates to a composition capable of greatly increasing oil recovery and a preparation method thereof. Background technique [0002] The main oilfields in my country have entered a high water cut period after primary and secondary recovery. How to improve oil recovery and maximize the development of remaining reserves, tertiary oil recovery technology has played a very important role in ensuring stable and high production of oil fields. Among them, surfactant flooding is considered to be a chemical agent that can greatly increase recovery, has a wide range of applications, and has the most development prospects. Surfactant plays an inestimable role in greatly enhancing oil recovery, whether it is used as a main agent or as an auxiliary agent for oil displacement. [0003] The main mechanism for the use of surfactants to enhance oil recovery is: after the oil field enters the high water cut period, the remaining oil is trapped in the pores...

Claims

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Application Information

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IPC IPC(8): C09K8/584B01F17/42B01F17/12C07C303/32C07C309/42C09K23/12C09K23/42
Inventor 何秀娟张卫东沙鸥李应成
Owner CHINA PETROLEUM & CHEM CORP
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