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Viscosity reducting, de-waxing, deoiling auxiliary agent in use for extracting petroleum, and preparation method

A technology of additives and petroleum, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of large heat loss, large heat loss, and inconspicuous effects, so as to improve fluidity, save energy, and reduce costs Effect

Inactive Publication Date: 2007-12-26
大连四方电泵有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, viscosity reduction is mainly based on emulsification and viscosity reduction. The viscosity reduction effect of emulsification in crude oil at room temperature or high water content is not obvious enough. Therefore, when producing high-viscosity oil in low-temperature areas, the method of injecting steam into the oil well must be used for heating production. Therefore, the steam injection time is long, the heat loss is large, the water content in the well is large, and the efficiency is difficult to improve
The reason is that in addition to colloidal asphalt and petroleum wax, crude oil also contains oil sludge. Due to their existence, the thermal diffusion of the injected steam is hindered, not only the heat loss is large, but the combination of oil sludge, colloidal asphalt and petroleum wax in crude oil The role of many crude oil flow improvers added can not play the role it should play, so the effect is not obvious
[0004] The existing technology has a good effect on the viscosity reduction, wax removal and wax prevention of crude oil. However, there is no additive that can remove sludge for crude oil mining, and there is no one that integrates the functions of viscosity reduction, wax removal, and sludge removal. Auxiliary report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Add 100kg of water into a batching container with a heating and stirring device to start stirring, add 30kg of nonylphenol polyoxyethylene ether, start heating after stirring evenly, and start adding 70kg of dodecyl when it is kept at 50-70°C Add benzene within 1 hour, heat up to 80-85°C, continue to stir for 30 minutes, and add 20kg of penetrant sodium dioctyl maleate sulfonate at this temperature, stir well and add 5kg of catalyst cobalt acetate (NC15 type), and continue stirring at this temperature for 1.5h. Cool down and discharge. The product is milky white viscous liquid. After testing the pH7.5. The preparation process is always carried out under stirring.

example 2

[0026] The preparation device is as in Example 1. Add 180kg of water into the batching container, start stirring, add 30kg of nonylphenol polyoxyethylene ether, stir evenly and start heating up, keep it at 50-70℃, start adding 70kg of dodecylbenzene, and finish adding within 1.5h , heat up to 80-85°C, continue to stir for 30 minutes, and add 20kg of penetrant sodium dioctyl maleate sulfonate at this temperature, stir evenly, add 5kg of catalyst cobalt acetate (NC15 type), and Stirring was continued at this temperature for 1.5 h. Cooling and discharging, the product is a milky white viscous liquid. After testing the pH7.5. The preparation process is always carried out under stirring.

example 3

[0028] Preparation device, operation method are the same as example 1, and the charging amount of raw material is: water 200kg; Nonylphenol polyoxyethylene ether 30kg; Dodecylbenzene 65kg; Penetrant sodium di-sec-octyl maleate sulfonate 18kg; Catalyst cobalt acetate 5kg. The product is slightly milky yellow viscous liquid.

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Abstract

This invention discloses additive used in petroleum exploitation. The additive is a milky or yellow viscose liquid, and the pH value is 7-8. The additive comprises: dispersant (dodecyl benzene) 18.0-38.0%, emulsifier (nonyl phenol polyoxyethylene ether) 8.0-18.0%, water 35.0-65.0%, penetrant (diethylhexyl sulfosuccinate) 5.0-11.0%, and catalyst (cobalt acetate) 1.0-3.0%. When the additive is combined with crude oil, colloid asphalt and wax in crude oil can be rapidly dispersed, and the sludge can be precipitated and separated, thus the viscosity can be reduced, wax and sludge can be removed, and the fluidity of crude oil can be improved. The viscosity reduction rate is 96.0-99.8%, the wax removal rate is 90-95%, and the sludge removal rate is 60-70%. The additive can avoid steam hot-exploitation of highly viscose crude oil.

Description

technical field [0001] The invention relates to an auxiliary agent for collecting petroleum in an oil field, especially an auxiliary agent for reducing the viscosity of crude oil, removing paraffin and sludge to improve collection efficiency. Background technique [0002] Most of the crude oil exists in the formation in the form of heavy oil. The viscosity of high-viscosity heavy oil is generally above 100,000 cP (centipoise), while low-viscosity crude oil also has a viscosity between 2000 and 5000 cP. The main body of crude oil is composed of colloidal asphalt, petroleum, wax, etc., and also contains a large amount of water and sludge. Oil sludge is calcium sludge with a particle size below 0.005 μm. The above factors are the main reasons for the decline in crude oil production and difficulties in oil recovery. For this reason, people must add many additives in the oil recovery process, such as viscosity reducer, wax clearing and anti-waxing agent, demulsification and deh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/52
Inventor 于文波
Owner 大连四方电泵有限公司
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