Interpenetrating polymer network modified pre-crosslinked profile control agent and preparation method thereof

An interpenetrating network and pre-crosslinking technology, applied in the field of interpenetrating network modified pre-crosslinking profile control agent and its preparation, can solve the problems of poor water retention performance, poor temperature resistance, low water absorption and the like

Inactive Publication Date: 2015-11-18
XI'AN PETROLEUM UNIVERSITY
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with its development, the shortcomings of some products have gradually become prominent, such as insufficient strength after water absorption, low water absorption, poor salt resistance, poor temperature resistance, poor water retention, and too fast expansion rate after water absorption. into the bottom depths, etc.

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
  • Interpenetrating polymer network modified pre-crosslinked profile control agent and preparation method thereof
  • Interpenetrating polymer network modified pre-crosslinked profile control agent and preparation method thereof
  • Interpenetrating polymer network modified pre-crosslinked profile control agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this embodiment, an interpenetrating network modified pre-crosslinked profile control agent includes the following components, calculated in parts by mass:

[0034]

[0035] The monomer A is vulcanized polyvinyl alcohol, and the vulcanization process is to dissolve 7 g of polyvinyl alcohol in 100 ml of dimethyl sulfoxide solution, heat and stir in a water bath at 50 ° C, and then place it in an ice-water bath at 5 to 10 ° C. Add twice the volume of concentrated sulfuric acid for vulcanization, add the vulcanized polyvinyl alcohol to anhydrous acetone until white precipitates are precipitated, wash with anhydrous methanol, filter and dry.

[0036] The monomer B is acrylic acid.

[0037] The monomer C is gelatinized starch, and the gelatinization process is to stir and gelatinize in a constant temperature water bath at 80° C. for 30 minutes according to the mass ratio of deionized water:starch=9:1.

[0038] The crosslinking agent is N,N'-methylenebisacrylamide.

...

Embodiment 2

[0055] In this embodiment, an interpenetrating network modified pre-crosslinked profile control agent includes the following components, calculated in parts by mass:

[0056]

[0057] The monomer A is vulcanized polyvinyl alcohol, and the vulcanization process is to dissolve 7 g of polyvinyl alcohol in 100 ml of dimethyl sulfoxide solution, heat and stir in a water bath at 50 ° C, and then place it in an ice-water bath at 5 to 10 ° C. Add twice the volume of concentrated sulfuric acid for vulcanization, add the vulcanized polyvinyl alcohol to anhydrous acetone until white precipitates are precipitated, wash with anhydrous methanol, filter and dry.

[0058] The monomer B is acrylic acid.

[0059] The monomer C is gelatinized starch, and the gelatinization process is to stir and gelatinize in a constant temperature water bath at 80° C. for 30 minutes according to the mass ratio of deionized water:starch=9:1.

[0060] The crosslinking agent is N,N'-methylenebisacrylamide.

...

Embodiment 3

[0075] In this embodiment, an interpenetrating network modified pre-crosslinked profile control agent includes the following components, calculated in parts by mass:

[0076]

[0077] The monomer A is vulcanized polyvinyl alcohol, and the vulcanization process is to dissolve 7 g of polyvinyl alcohol in 100 ml of dimethyl sulfoxide solution, heat and stir in a water bath at 50 ° C, and then place it in an ice-water bath at 5 to 10 ° C. Add twice the volume of concentrated sulfuric acid for vulcanization, add the vulcanized polyvinyl alcohol to anhydrous acetone until white precipitates are precipitated, wash with anhydrous methanol, filter and dry.

[0078] The monomer B is acrylic acid.

[0079] The monomer C is gelatinized starch, and the gelatinization process is to stir and gelatinize in a constant temperature water bath at 80° C. for 30 minutes according to the mass ratio of deionized water:starch=9:1.

[0080] The crosslinking agent is N,N'-methylenebisacrylamide.

...

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 an interpenetrating polymer network modified pre-crosslinked profile control agent and a preparation method thereof. The preparation method comprises the following steps: (1), adding a monomer A and a monomer B into deionized water and adding a sodium hydroxide solution to neutralize the monomer A to be neutral or weakly acid; (2), adding a pasting monomer C and a crosslinking agent into the mixed solution obtained in the step (1); (3), adding calcined kaolin and calcined bentonite into the product obtained in the step (2) and uniformly mixing; (4), preparing an initiator into an aqueous solution and then adding the aqueous solution into the product obtained in the step (3); (5), soaking and washing the reaction product obtained in the step (4) through distilled water to wash out residual alkali and monomers in the reaction product, so as to obtain a gelatinous product; (6), taking out the gelatinous product and then putting the gelatinous product into a methanol aqueous solution so as to obtain a dehydration product; (7), grinding and smashing the dehydration product so as to obtain the interpenetrating polymer network modified pre-crosslinked profile control agent. The produced pre-crosslinked particles for water injection well profile control have the advantage that at a high-temperature hypersalinity low-permeability reservoir, the swelling rate of the pre-crosslinked particles absorbing water can meet the requirement that the pre-crosslinked particles enter the deep part of a bottom layer.

Description

technical field [0001] The invention relates to the synthesis of a profile control agent for water injection wells in the petroleum industry, and is specifically applied to an interpenetrating network modified pre-crosslinked profile control agent for high-temperature and high-salinity reservoirs and a preparation method thereof. Background technique [0002] Oil well water production is a common phenomenon in the process of oilfield development, which may occur in any period of oil well production. If a certain amount of water cut does not affect production, no treatment measures need to be taken. However, excessive water production will not only increase the production cost of crude oil, but also reduce the production life of oil wells, so it is necessary to take water control measures. Water plugging and profile control technology has always been an effective means for oilfields to improve the development effect of water injection oilfields and achieve stable production o...

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): C09K8/512
CPCC09K8/512
Inventor 郭学辉赵文韬杜素珍
Owner XI'AN PETROLEUM UNIVERSITY
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