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

A kind of supramolecular oil well selective water shutoff agent and preparation method thereof

A molecular oil well, selective technology, applied in chemical instruments and methods, drilling composition, etc., can solve problems such as poor oil-water selectivity

Active Publication Date: 2017-07-04
QINGDAO UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the polymer is adsorbed in the hydrophilic formation of the oil well, it can generate a supermolecule through the self-assembly of the side chain β-cyclodextrin and the benzene ring, so as to achieve the purpose of selective spontaneous water shutoff of the oil well and overcome the previous water shutoff agent. The problem of poor oil-water selectivity

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
  • A kind of supramolecular oil well selective water shutoff agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] (1) Add 0.45 mol of refined β-cyclodextrin into a reaction vessel with a stirring device, and add 5.0 mol of ethanol. After mixing thoroughly, keep the temperature at 65°C for 0.5 h to form a uniform solution, and pour it into the solution with a dropping funnel. Slowly add 0.4mol epichlorohydrin dropwise to the reaction vessel, after dropping, raise the temperature of the reaction solution to 70°C-75°C, react for 3h, add 0.5mol 1-chloromethylbenzene after the reaction, and mix thoroughly;

[0007] (2) Add 0.2mol of diethylenetriamine into a reaction vessel with a stirring device, add 3.0mol of ethanol, raise the temperature to 70°C, slowly add 0.2mol of epichlorohydrin with a dropping funnel, and react at 70°C for 3h ;

[0008] (3) Slowly drop the mixture obtained in step (1) into the mixture obtained in step (2) using a dropping funnel. After the drop is complete, heat up to 90°C to 95°C and react for 4 hours to obtain the product. The average molecular weight of the...

Embodiment 2

[0010] (1) Add 0.5mol of refined β-cyclodextrin into a reaction vessel with a stirring device, add 5.0mol of ethanol, mix thoroughly, keep the temperature at 65°C for 0.5h to form a uniform solution, and pour it into the reaction vessel with a dropping funnel Slowly add 0.5 mol of epichlorohydrin into the solution, after dropping, the temperature of the reaction solution is raised to 70°C to 75°C, and react for 3.0 hours. After the reaction, add 0.5mol of 1-chloromethylbenzene and mix thoroughly;

[0011] (2) Add 0.3mol of diethylenetriamine into a reaction vessel with a stirring device, add 3.0mol of ethanol, heat up to 70°C, slowly add 0.3mol of epichlorohydrin with a dropping funnel, dropwise, and react at 70°C 3h;

[0012] (3) Slowly drop the mixture obtained in step (1) into the mixture obtained in step (2) using a dropping funnel. After the drop is complete, heat up to 90°C to 95°C and react for 4 hours to obtain the product. The average molecular weight of the product ...

Embodiment 3

[0014] (1) Add 0.55 mol of refined β-cyclodextrin into a reaction vessel with a stirring device, add 5.0 mol of ethanol, mix thoroughly, and keep the temperature at 65°C for 0.5h to form a uniform solution. Slowly add 0.6 mol of epichlorohydrin into the reaction vessel dropwise with a dropping funnel, after dropping, raise the temperature to 70°C-75°C, react for 3.0h, add 0.5mol of 1-chloromethylbenzene after the reaction, and mix thoroughly;

[0015] (2) Add 0.4mol of diethylenetriamine into a reaction vessel with a stirring device, add 3.0mol of ethanol, heat up to 70°C, slowly add 0.4mol of epichlorohydrin with a dropping funnel, dropwise, and react at 70°C 3.0h;

[0016] (3) Slowly add the mixture obtained in step (1) dropwise to the mixture obtained in step (2) with a dropping funnel, after the drop is complete, heat up to 90°C to 95°C and react for 4 hours to obtain the product. The average molecular weight of the product measured by mass spectrometry is about 21370, an...

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
diameteraaaaaaaaaa
compressive strengthaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a supramolecular oil well selective water shutoff agent and a preparation method thereof. The water shutoff agent utilizes the self-assembly of its own side chain groups in the hydrophilic formation of the oil well to form a supramolecular structure, thereby achieving the purpose of oil-water selective water shutoff. The water blocking agent overcomes the problem of poor selectivity of the current water blocking agent, can greatly reduce the water content of crude oil produced by oil wells, improve the efficiency of crude oil extraction, and reduce the cost of crude oil extraction.

Description

technical field [0001] The invention belongs to the field of oil recovery additives for oil fields, and in particular relates to a selective water shutoff agent for oil wells and a preparation method thereof. Background technique [0002] In recent years, most oilfields in my country have entered the mid-to-late stage of development, and the comprehensive water cut has risen sharply. The comprehensive water cut of most oil reservoirs has exceeded 90%, which seriously affects the normal production of oilfields. Water production from oil wells has become a serious problem for water injection development oilfields. question. For this reason, oil wells usually have to be shut off to reduce their water cut. The essence of water plugging is to change the flow direction of water in the formation. Through water blocking, the energy of the formation can be maintained, and the sweep coefficient of injected water or other oil displacement agents can be improved, thereby improving the r...

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 Patents(China)
IPC IPC(8): C08G81/00C08B37/16C09K8/50
Inventor 麻金海孔淑玲
Owner QINGDAO UNIV
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