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

Method for preparing oil-displacing agent by modified charged polymer microspheres

A technology of polymer and oil-displacing agent, applied in chemical instruments and methods, drilling compositions, etc., can solve the problem that the viscosity of flooding fluid cannot be improved, the adhesion between crude oil and rock is reduced, and the oil-washing ability is not obvious. and other problems, to achieve the effect of low cost, reduced adhesion and easy peeling

Inactive Publication Date: 2016-05-04
CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: Aiming at the problem that the current oil displacing agent cannot improve the viscosity properties of the displacing fluid and the effect of oil washing ability is not obvious, it provides a method for preparing microspheres by polymerizing styrene, stilbene and polylactic acid , and then carry out charging treatment through acidification and esterification. Through the sulfonation process, hydrophilic groups are introduced into the charged microspheres to reduce the surface activity and further reduce the cohesion between crude oil and rock, so that the crude oil is easily peeled off and the oil washing efficiency is improved. Increased by 10-15%, in the process of washing oil, it has no alkali, no corrosion and no fouling damage

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] First, at 25°C, according to the mass ratio of 1:1:2, styrene, divinylbenzene, and polylactic acid monomers were stirred and mixed, and at the same time, 2% of the total mass of styrene was added dropwise with acrylonitrile and total styrene. 5% of the mass The methylene blue solution with a mass fraction of 10% was stirred and mixed and heated to 80°C, and continued magnetic stirring for 3 hours; after the stirring was completed After completion, heat up again until the solution boils for 2 hours, then let it cool down to 30°C, filter it with suction and collect the filter cake, wash it with absolute ethanol for 5 times, and dry it in an oven at 80°C for 8 hours to prepare a blank Resin microspheres; add 45mL of acetonitrile to a dry 100mL round bottom flask, then continue to add 0.5g of the blank resin microspheres prepared above, 0.10g of 2-mercaptobenzoic acid, and 0.10g of azobisisobutyronitrile , make it stir and mix for 15min; after the stirring is completed, p...

example 2

[0022] First, at 20°C, according to the mass ratio of 1:1:2, styrene, divinylbenzene, and polylactic acid monomers were stirred and mixed, and at the same time, 2% of the total mass of styrene was added dropwise with acrylonitrile and total styrene. 5% by mass of the methylene blue solution with a mass fraction of 10%, stirred and mixed, heated to 60°C, and continued magnetic stirring for 2h; It was suction-filtered and the filter cake was collected, washed with absolute ethanol for 3 times, and dried in an oven at 60°C for 6 h to prepare blank resin microspheres; 40 mL of acetonitrile was added to a dry 100 mL round-bottomed flask, and then Continue to add 0.2 g of the above-prepared blank resin microspheres, 0.05 g of 2-mercaptobenzoic acid, and 0.08 g of azobisisobutyronitrile, and stir and mix for 10 minutes; Microsphere suspension, then heat it up to boiling, reflux and collect acetonitrile, stop heating after 1 / 2 of the acetonitrile is evaporated, let stand and cool to 2...

example 3

[0024]First, at 22°C, according to the mass ratio of 1:1:2, styrene, divinylbenzene, and polylactic acid monomers were stirred and mixed, and at the same time, 2% of the total mass of styrene was added dropwise with acrylonitrile and total styrene. 5% by mass of the methylene blue solution with a mass fraction of 10%, stirred and mixed, heated to 70°C, and continued magnetic stirring for 2h; It was suction-filtered and the filter cake was collected, washed with absolute ethanol for 4 times, and dried in an oven at 70°C for 7 hours to prepare blank resin microspheres; 42mL of acetonitrile was added to a dry 100mL round-bottomed flask, and then Continue to add 0.3 g of the above-prepared blank resin microspheres, 0.07 g of 2-mercaptobenzoic acid, and 0.09 g of azobisisobutyronitrile, and stir and mix for 12 minutes; Microsphere suspension, then heat it up to boiling, reflux and collect acetonitrile, stop heating after 1 / 2 of the acetonitrile is evaporated, let stand and cool to ...

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 relates to a method for preparing an oil-displacing agent by modified charged polymer microspheres, belonging to the technical field of preparation of oil-displacing agents. The method comprises the steps of firstly mixing the substances such as styrene, meanwhile dropwise adding an acrylonitrile solution and a methyl blue solution, heating, cooling, performing suction filtration, washing and drying, then mixing with the substances such as 2-mercaptobenzoic acid, performing ultrasonic dissolution, heating, cooling, performing ultrasonic dispersion, filtering, collecting a filter cake, washing and drying, then placing into hydrofluoric acid, mixing, performing suction filtration and collecting the filter cake, drying, and mixing with distilled water, heating, adding ethylenediamine and formaldehyde, performing heat preservation, cooling, adjusting the pH value, performing suction filtration, collecting filter liquor, heating, adding the substances such as absolute ethyl alcohol, performing heat preservation, cooling, performing rotary evaporation, and drying to obtain the oil-displacing agent. The method has the beneficial effects that the oil-displacing agent prepared by the invention can reduce the binding force of crude oil with rock, so that the crude oil can be easily stripped, the displacement efficiency is improved by 10 to 15 percent, in a washing oil process, no damage of alkali, corrosion and scale.

Description

technical field [0001] The invention relates to a method for preparing an oil-displacing agent by modified polymer charged microspheres, and belongs to the technical field of oil-displacing agent preparation. Background technique [0002] Oil-displacing agent is an additive used to enhance oil recovery during oil drilling, and polymer-based oil-displacing agents are commonly used. For example, ultra-high molecular weight polyacrylamide, with 0.05% aqueous solution, can penetrate into the rock crevices of the oil layer and produce 20% to 30% more oil, roughly 10 barrels (1590L) of crude oil can be produced for every 1kg of oil displacement agent, the polymer solution and the surface The staged oil displacement of the active agent (microemulsion of petroleum sulfonate and alcohol) can displace the crude oil in the rock capillary, and the effect is almost 100%. [0003] When the oil field enters the late stage of oil recovery, in order to further enhance oil recovery, it is ne...

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): C08F283/02C08F212/08C08F212/36C08F8/00C08F8/14C08F8/36C09K8/588
CPCC08F8/00C09K8/588
Inventor 高玉梅薛红娟高力群
Owner CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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