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

Novel inorganic-organic ternary composite plugging agent for oil extraction and preparation method

A ternary composite and inorganic technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of weak gel strength, long gel time, short gel time, etc. The effect of prolonged glue time and low cost

Inactive Publication Date: 2010-11-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the above-mentioned defects in the prior art, to provide a new type of inorganic-organic ternary composite plugging agent for oil recovery and its preparation method, and to overcome the short gelation time and relatively weak gel strength of inorganic silicic acid In order to provide an inorganic-organic composite gel with a relatively long gel time (6-8h) and high gel strength below 70°C, and the gel has a certain toughness and is not easy to crack

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

Embodiment 1

[0013] Example 1: First weigh 0.1g of polyacrylamide and 0.5g of phenolic resin, and prepare 100ml of aqueous solution, add 10ml of water glass after stirring and dissolving, heat at 60°C for 2-3 hours, then add 18ml under stirring conditions 5% phosphoric acid solution to obtain an alkaline gel with a pH value of 10.5.

Embodiment 2

[0014] Example 2: First weigh 0.1g of polyacrylamide and 0.5g of phenolic resin, and prepare 100ml of aqueous solution, add 10ml of water glass after stirring and dissolving, heat at 60°C for 2-3 hours, then add 28ml under stirring conditions 85% citric acid solution, the alkaline gel with pH value of 10.0 can be obtained.

Embodiment 3

[0015] Example 3: First, weigh 0.2g of polyacrylamide and 0.8g of phenolic resin, and prepare 100ml of aqueous solution. After stirring and dissolving, add 12ml of water glass, heat at 60°C for 2 to 3 hours, then add 18ml under stirring conditions 5% phosphoric acid solution to obtain an alkaline gel with a pH value of 10.5.

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
modulusaaaaaaaaaa
Login to View More

Abstract

The invention relates to a novel inorganic-organic ternary composite plugging agent for oil extraction and a preparation method. The invention adopts the technical scheme that: the plugging agent is prepared by mixing 8 to 12 percent of water glass of which the modulus is 3.3, 0.1 to 0.3 percent of polyacrylamide and 0.3 to 0.8 percent of water-soluble phenolic resin and the balance of phosphoricacid and water, wherein the phosphoric acid is used for adjusting a pH value. Under the condition of overcoming short gelation time and relatively weak gelation intensity of inorganic silicic acid, inorganic-organic plural gel which has the characteristics of relatively long gelation time at the temperature of less than 70 DEG C, high gelation intensity, certain tenacity and difficult cracking isprovided and is suitable for different stratum environments.

Description

1. Technical field: [0001] The invention relates to a novel inorganic-organic ternary composite plugging agent for oil production and a preparation method thereof. 2. Background technology: [0002] At present, most domestic oil fields have entered the development stage of high water cut or extremely high water cut: liquid production increases, oil production decreases, water content exceeds 80%, even as high as 90%, and the increase of liquid production directly leads to formation Reduced energy, reduced pump efficiency of pumping wells, increased corrosion and scaling of pipelines and equipment, increased water treatment costs, and increased investment costs directly affect crude oil production and lead to a decrease in the ultimate recovery of oil layers. [0003] Water production from oil wells is a common problem in water injection (or steam injection) development of oil fields. In the process of oil field development, when the original energy of the oil layer begins t...

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): C09K8/46
Inventor 李文江何婷婷孔瑛
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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