Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Temperature-resistant and salt-resistant emulsion type multipolymer for profile control and displacement of offshore oilfield and preparation method thereof

A multi-component copolymer, temperature-resistant and salt-resistant technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as strong technical requirements and difficulty in meeting the thermal stability requirements of control and flooding measures, and achieve significant economic benefits , good market promotion prospects, significant effect of increasing oil and reducing water

Pending Publication Date: 2022-05-10
CHINA NAT OFFSHORE OIL CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because seawater contains more inorganic salt components, the salinity is close to 4×10 4 mg / L, for oilfields where the reservoir temperature exceeds 90°C, the gel system formed by conventional emulsion-type polyacrylamide and phenolic resin-type cross-linking agent is difficult to meet the thermal stability requirements of the control and flooding measures for 6 months. Dehydrate and degrade within 1 month
Therefore, there is currently no emulsion polymer in the market that meets the technical requirements of temperature and salt tolerance in offshore oilfields for online injection control and flooding in offshore high-temperature and high-salt oilfields, and the technical demand is very strong.

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
  • Temperature-resistant and salt-resistant emulsion type multipolymer for profile control and displacement of offshore oilfield and preparation method thereof
  • Temperature-resistant and salt-resistant emulsion type multipolymer for profile control and displacement of offshore oilfield and preparation method thereof
  • Temperature-resistant and salt-resistant emulsion type multipolymer for profile control and displacement of offshore oilfield and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A temperature-resistant and salt-resistant emulsion-type multi-component copolymer for offshore oil field control and flooding. The raw materials are: acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, white oil, sodium hydroxide, emulsifier, initiator, Phase agent, distilled water.

[0028] Clean the chemical dissolution tank and pipeline, and rinse with distilled water until the conductivity is less than 10μs / cm. Add 200kg of distilled water, 200kg of acrylamide, and 200kg of AMPS into the monomer dissolution tank; add sodium hydroxide to adjust the pH value to 7; control the temperature to 15°C. Under stirring conditions, add 200kg of white oil to the emulsification tank, add 150kg of emulsifier, turn on the emulsification pump, and emulsify. Under the condition of stirring, transfer the dissolved monomer to the emulsification tank, add 0.5 kg of initiator, and at the same time turn on the reflux of the circulating cooling liquid, and control the temperature wit...

Embodiment 2

[0030] A temperature-resistant and salt-resistant emulsion-type multi-component copolymer for offshore oil field control and flooding. The raw materials are: acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, white oil, sodium hydroxide, emulsifier, initiator, Phase agent, distilled water.

[0031] Clean the chemical dissolution tank and pipeline, and rinse with distilled water until the conductivity is less than 10μs / cm. Add 200kg of distilled water, 100kg of acrylamide, and 300kg of AMPS into the monomer dissolution tank; add sodium hydroxide to adjust the pH value to 7; control the temperature at 15°C. Under stirring conditions, add 200kg of white oil to the emulsification tank, add 150kg of emulsifier, turn on the emulsification pump, and emulsify. Under the condition of stirring, transfer the dissolved monomer to the emulsification tank, add 0.5 kg of initiator, and at the same time turn on the reflux of the circulating cooling liquid, and control the temperature wit...

Embodiment 3

[0033] A temperature-resistant and salt-resistant emulsion-type multi-component copolymer for offshore oil field control and flooding. The raw materials are: acrylamide, 2-acrylamide-2-methylpropanesulfonic acid, white oil, sodium hydroxide, emulsifier, initiator, Phase agent, distilled water.

[0034] Clean the chemical dissolution tank and pipeline, and rinse with distilled water until the conductivity is less than 10μs / cm. Add 200kg of distilled water, 100kg of acrylamide, and 300kg of AMPS into the monomer dissolution tank; add sodium hydroxide to adjust the pH value to 7; control the temperature at 15°C. Under stirring conditions, add 150kg of white oil to the emulsification tank, add 200kg of emulsifier, turn on the emulsification pump, and emulsify. Under the condition of stirring, transfer the dissolved monomer to the emulsification tank, add 0.5 kg of initiator, and at the same time turn on the reflux of the circulating cooling liquid, and control the temperature wit...

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 provides a temperature-resistant and salt-resistant emulsion-type multipolymer for profile control and displacement of offshore oilfields and a preparation method thereof, the emulsion-type multipolymer is generated by polymerization reaction of water-soluble monomers and temperature-resistant and salt-resistant functional monomers in an oil phase, and the temperature resistance and salt resistance of the emulsion-type multipolymer are improved by increasing the content of the temperature-resistant and salt-resistant functional monomers. The synthetic raw material comprises the following components in percentage by weight: 10 to 30 percent of water-soluble monomer, 10 to 30 percent of temperature-resistant and salt-resistant monomer, 20 to 30 percent of oil phase, 3 to 10 percent of emulsifier, 10 to 30 percent of distilled water, 0.003 to 0.06 percent of initiator and 0.005 to 0.1 percent of phase inversion agent. The multi-component copolymer can effectively solve the problem that a gel system formed by conventional emulsion type polyacrylamide is difficult to meet the requirement of 6-month thermal stability of a high-temperature and high-salt oil reservoir profile control and displacement measure, so that the multi-component copolymer is widely applied to online profile control and displacement measures of offshore high-temperature and high-salt oil fields, has very strong technical requirements and is excellent in economic benefit.

Description

technical field [0001] The invention relates to the chemical technical field of oilfield development and production increase measures, and more specifically relates to a temperature-resistant and salt-resistant emulsion-type multi-component copolymer for offshore oilfield adjustment and flooding and a preparation method thereof. Background technique [0002] Because offshore oilfields have sufficient seawater resources, many oilfields use seawater injection for development. With the continuous development of water flooding, the rise of water cut has become an inevitable development contradiction for waterflooding oilfields. Regulatory flooding has become one of the current waterflooding development oilfields. It is a very important measure to stabilize oil and control water. At present, the most widely used control and flooding agent is polymer gel. In addition, the space of the offshore platform is small. In order to reduce the area occupied by the control and flooding cons...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C09K8/512C09K8/588C09K8/88
CPCC08F220/56C08F220/585C09K8/512C09K8/588C09K8/887
Inventor 张艳辉陈维余孟科全朱立国黄波温守国吴清辉魏子扬罗振清李馨悦吴婧刘观军刘凤霞彭齐国
Owner CHINA NAT OFFSHORE OIL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com