A kind of oil displacing agent and preparation method thereof

A technology of oil displacement agent and ammonium chloride, which is applied in the field of chemical flooding, can solve the problems of poor oil washing effect, high agent cost, and low input-output ratio, and achieve the effects of increased oil recovery, low price, and simple production process

Active Publication Date: 2021-03-09
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current chemical flooding technology still has the characteristics of high chemical cost, poor oil washing effect, and low input-output ratio

Method used

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  • A kind of oil displacing agent and preparation method thereof
  • A kind of oil displacing agent and preparation method thereof
  • A kind of oil displacing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Open the stirring of stirring reactor, first 6kg isopropanol is added in stirring reactor, then 30kg nonylphenol polyoxyethylene ether (9) carboxylate, 15kg dodecyl / tetradecyl alcohol polyoxyethylene ether (9) ), 20kg propylene bis[(dodecyl hydroxyethyl methyl) ammonium chloride], 11kg dodecyl / tetradecyl alcohol polyoxyethylene ether (2) sodium sulfate, 10kg docusate sodium, 8kg sophora The glycolipid is added into the stirred reactor, and the temperature of the stirred reactor is maintained at 30° C., and the raw materials therein are stirred until they are colorless and transparent to obtain an oil displacing agent.

Embodiment 2

[0037] Start the stirring of the stirred reactor, first add 6kg isopropanol in the stirred reactor, then add 15kg dodecyl / tetradecyl alcohol polyoxyethylene ether (9) carboxylate, 10kg dodecyl / tetradecyl alcohol polyoxyethylene Vinyl ether (5), 50kg ethylene group bis[(octadecyl dimethyl) ammonium chloride], 6kg dodecyl / tetradecyl alcohol polyoxyethylene ether (3) sodium sulfate, 8kg docusate sodium, Add 5 kg of sophorolipids into the stirred reactor, and maintain the temperature of the stirred reactor at 35° C., stir the raw materials therein until it is colorless and transparent, and obtain the oil displacing agent.

Embodiment 3

[0039]Start the stirring of the stirred reactor, first add 8kg of isopropanol in the stirred reactor, then add 19kg of isomeric tridecyl alcohol polyoxyethylene ether (9) carboxylate, 11kg of dodecyl / tetradecyl alcohol polyoxyethylene ether (7), 32kg ethylene group bis[(hexadecyl amido dimethyl) ammonium chloride], 5kg lauryl / tetradecyl alcohol polyoxyethylene ether (2) sodium sulfate, 12kg lauryl polyoxyethylene Disodium ether sulfosuccinate and 13 kg of sophorolipids were added into the stirred reactor, and the temperature of the stirred reactor was maintained at 40° C., and the raw materials therein were stirred until colorless and transparent to obtain an oil displacing agent.

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Abstract

An oil displacing agent and a preparation method thereof. The oil displacement agent comprises 3-30% by weight of alcohol ether carboxylate, 10-40% by weight of fatty alcohol polyoxyethylene ether, 20-65% by weight of quaternary ammonium salt, 0-21% by weight of fatty alcohol polyoxyethylene ether sodium sulfate, 0-36% by weight of ester sodium salt, 5-25% by weight of sophorolipid, 0-15% by weight content of isopropanol. The method comprises: under stirring conditions, optionally adding the isopropanol into a container, adding the alcohol ether carboxylate, the fatty alcohol polyoxyethylene ether, the quaternary ammonium salt, and the sophoric acid Glycolipids, the fatty alcohol polyoxyethylene ether sulfonate and optionally the fatty alcohol polyoxyethylene ether sodium sulfate and the ester sodium salt are added into the container, and stirred until colorless and transparent to obtain the oil repellant. The oil displacement agent of the present application can increase the oil recovery rate of the oil reservoir, and is resistant to high temperature, high salt and heavy oil.

Description

technical field [0001] The present application relates to chemical flooding technology, in particular to an oil flooding agent and a preparation method thereof. Background technique [0002] The oil extraction process is divided into three stages: the extraction process of pressing crude oil out of the surface by virtue of formation pressure is called primary oil recovery; the extraction process of increasing formation pressure by gas injection or water injection is called secondary oil recovery; after secondary oil recovery There are still a large amount of crude oil remaining in the ground, which needs to be recovered by physical, chemical and other technologies, which is called tertiary oil recovery. EOR is an effective measure to slow down the aging rate of oil fields and maintain stable crude oil production. For a long time, chemical flooding technology has been considered to be the most suitable method for improving oilfield recovery in the late stage of water floodin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
Inventor 山金城郑举李虎李翔徐国瑞张延旭代向辉贾永康李晓伟
Owner CHINA NAT OFFSHORE OIL CORP
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