Reverse-phase demulsifying agent for treating polymer flooding produced liquid of oil fields and preparation method thereof

A reverse-phase demulsifier and liquid-use technology, which is applied in the field of petroleum industry, can solve problems such as difficult adaptation, increased cost and difficulty of sewage treatment system, sludge clogged filter, etc.

Inactive Publication Date: 2014-04-30
SOUTHWEST PETROLEUM UNIV
View PDF2 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inverse demulsifiers mainly include low-molecular electrolytes, alcohols, and cationic polymers. These agents are generally difficult to meet the requirements of polymer flooding production fluid treatment. After demulsification, the oil

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reverse-phase demulsifying agent for treating polymer flooding produced liquid of oil fields and preparation method thereof
  • Reverse-phase demulsifying agent for treating polymer flooding produced liquid of oil fields and preparation method thereof
  • Reverse-phase demulsifying agent for treating polymer flooding produced liquid of oil fields and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 takes N'N-dimethylethanolamine as the preparation of the polypropylene oxide oil head of initiator

[0032] Add 10g N'N-dimethylethanolamine and 2.4g potassium hydroxide to the high-temperature and high-pressure reactor, and seal the reactor well. Before heating up, use nitrogen to blow and replace, then use a vacuum pump to evacuate, repeat twice, then start stirring and raise the temperature, stop heating when the temperature rises to 120°C, open the feed valve, add 790g of propylene oxide dropwise, and control the reaction The temperature does not exceed 140°C and the pressure is controlled below 0.4MPa. After the reaction of the material is completed, the pressure drops and then reacts for 30 minutes to reduce the pressure to 0MPa. Finally, the temperature is lowered and the kettle is opened, and the output is N'N-dimethylethanolamine. The polypropylene oxide oil head of starter, marked as DMEA-79.

Embodiment 2

[0034] The method of Example 1 is adopted, but the amount of propylene oxide is changed to 340g, 450g, 570g, and 990g respectively, and the obtained polypropylene oxide oil head with N'N-dimethylethanolamine as the initiator is the initiator , respectively marked as DMEA-34, DMEA-45, DMEA-57, DMEA-99.

Embodiment 3

[0035] Embodiment 3 is the preparation of ethylene oxide and propylene oxide block polyether with N'N-dimethylethanolamine as initiator

[0036] Add 40g of DMEA-79 oil head and 3.20g of potassium hydroxide to the high temperature and high pressure reactor, and seal the reactor well. Before heating up, use nitrogen to blow and replace, then use a vacuum pump to evacuate, repeat twice, then start stirring and heat up, stop heating when the temperature rises to 120°C, open the feed valve, add 240g of ethylene oxide dropwise, control The reaction temperature does not exceed 140°C and the pressure is controlled below 0.4MPa. After the reaction of the material is completed, the pressure drops and then reacts for 30 minutes to reduce the pressure to 0MPa; then, heat to 130°C and then add 360g of propylene oxide, and control the reaction temperature not to exceed 150°C and the pressure is controlled below 0.4MPa. After the reaction of the material is completed, the pressure drops and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a reverse-phase demulsifying agent for treating polymer flooding produced liquid of oil fields and a preparation method thereof, and relates to the technical field of oil industries. According to the preparation method, the reverse-phase demulsifying agent for treating the polymer flooding produced liquid of the oil fields is prepared by using ethylene oxide and propylene oxide block polyether taking N,N-dimethylethanolamine as an initiating agent and acrylic acid as raw materials and adding a catalyst and the initiating agent. When the polymer flooding produced liquid is treated by the reverse-phase demulsifying agent compounded with a conventional demulsifying agent for the oil fields, the quality of water obtained by dehydration is good.

Description

technical field [0001] The invention relates to the technical field of petroleum industry, in particular to a reverse-phase demulsifier for treating oil field polymer flooding production fluid and a preparation method thereof. Background technique [0002] At present, many domestic oilfields have entered the stage of full-scale polymer injection, and the properties of polymer flooding fluids are quite different from those of water flooding fluids. For the produced fluid of polymer flooding, the distribution of the polymer in the water phase and the oil-water interface leads to stronger stability of the oil-water emulsion, resulting in a decrease in the dehydration rate and a deterioration of the produced water quality during demulsification. So far, the demulsifier system used in various oil fields is usually composed of W / O emulsion demulsifier + reverse phase demulsifier. The demulsifier is mainly used to improve the dehydration rate and dehydration speed, and the reverse ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08F283/06C08G65/28C10G33/04
Inventor 段明马永张方申文靖波张健
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap