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

Nanocomposite viscoelastic oil displacement agent produced on line

An oil displacing agent and composite technology, which is applied in the field of nano-composite viscoelastic oil displacing agent, can solve the problems of difficult to reach the expected value of injectability, inability to inject online, and increase cost input, so as to reduce the cost of chemicals and operations, improve the Transport performance, the effect of reducing construction equipment

Inactive Publication Date: 2021-11-05
CHINA OILFIELD SERVICES
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above research is mainly on polymer flooding technology and conventional polymer-based control and displacement agents. For high-salinity oilfields, salt-resistant polymers need to be used, which increases cost and cannot be injected online, and the injectivity is difficult to meet expectations value

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
  • Nanocomposite viscoelastic oil displacement agent produced on line
  • Nanocomposite viscoelastic oil displacement agent produced on line
  • Nanocomposite viscoelastic oil displacement agent produced on line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0085] The oil displacement agent of the present embodiment is the injection aqueous solution that surfactant concentration is 0.5%, and wherein surfactant is PEHSB, EHSB, hexadecylamide propyl hydroxypropyl sulfonate that weight ratio is 72:18:6:4 betaine and tetradecylpropyl sultaine. The oil displacement agent system of this embodiment is 100mL.

[0086] The preparation method of the oil displacement agent of the present embodiment is: first mix PEHSB, EHSB, hexadecyl amidopropyl hydroxypropyl sultaine and myristyl propyl sultaine in proportion, then mix 0.5 The g mixture was dissolved in injection water, stirred at a constant temperature of 60° C. for 30 minutes, and 100 mL of an oil-displacing agent with a surfactant concentration of 0.5% was prepared.

Embodiment 1-2

[0088] The oil displacement agent of the present embodiment is the injection aqueous solution that surfactant concentration is 0.5%, and wherein surfactant is by weight ratio PEHSB, EHSB, hexadecyl amidopropyl hydroxypropyl sulfonate of 67.5:22.5:6:4 Composed of betaine and tetradecylpropyl sultaine. The oil displacement agent system of this embodiment is 100mL.

[0089] The preparation method of the oil displacement agent of this embodiment is the same as that of Example 1-1, the only difference is that PEHSB, EHSB, cetyl amidopropyl hydroxypropyl sultaine and tetradecyl propyl sultaine The proportion of alkali is adjusted adaptively.

Embodiment 1-3

[0091] The oil displacement agent of the present embodiment is the injection aqueous solution that surfactant concentration is 0.5%, and wherein surfactant is PEHSB, EHSB, hexadecylamide propyl hydroxypropyl sulfonate that weight ratio is 45:45:6:4 Composed of betaine and tetradecylpropyl sultaine. The oil displacement agent system of this embodiment is 100mL.

[0092] The preparation method of the oil displacement agent of this embodiment is the same as that of Example 1-1, the only difference is that PEHSB, EHSB, cetyl amidopropyl hydroxypropyl sultaine and tetradecyl propyl sultaine The proportion of alkali is adjusted adaptively.

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
viscosityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a nanocomposite oil displacement agent produced on line. The nanocomposite oil displacement agent comprises 0.05-0.8% of a surfactant, with the balance being water, wherein the surfactant comprises erucamide propyl hydroxy sulfobetaine or erucylamide propyl betaine, hexadecylamide propyl hydroxy propyl sulfobetaine and myristyl propyl sulfobetaine. The composite oil displacement agent disclosed by the invention may also comprises at least one selected from tetradecylamide propyl hydroxypropyl sulfobetaine and hexadecyl propyl sulfobetaine, and / or nanometer silicon dioxide with content of not more than 0.05%, and / or sodium dodecyl benzene sulfonate with content of not more than 0.03%, and / or 0.05 to 0.1% of polyether diamine and 0.05 to 0.1% of salicylic acid. For oil reservoirs with different mineralization degrees and permeability, the viscosity and interfacial tension of the nanocomposite viscoelastic oil displacement agent disclosed by the invention in an oil layer are controllable; and inorganic ions in stratum injection water are fully utilized under the condition of ensuring online injection.

Description

technical field [0001] The invention relates to the technical field of balanced oil displacement of offshore continental sandstone reservoirs, in particular, the invention relates to a nanocomposite viscoelastic oil displacement agent produced on-line. Background technique [0002] At present, the effective means to improve the development effect of oilfield water flooding is to expand the swept volume of injected water. However, as the oilfield gradually enters the medium-high water-cut or ultra-high water-cut development stage, the remaining oil-enriched areas are distributed in the deep formations, and the original near-wellbore profile control technology has been difficult to meet the needs of deep liquid flow diversion in the mine. In addition, for reservoirs with strong heterogeneity or high salinity, the injectability or salt resistance of existing conventional polymer gels is difficult to meet the environmental requirements, and the cost of salt-resistant modified po...

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): C09K8/584
CPCC09K8/584
Inventor 李翔于萌铁磊磊
Owner CHINA OILFIELD SERVICES
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