Strong gas-wetting nanosilicon dioxide water block removal agent, preparation method thereof and method for wetting transition of rock surface

A technology of nano-silica and water-dissolving and locking agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of limited effect, not well applicable to low-permeability oil and gas reservoirs, etc., to improve flow conditions, relieve Effect of water lock damage and enhanced oil and gas recovery

Active Publication Date: 2015-03-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF7 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The wettability inversion treatment agents used in the above methods do not use gas-moisture nanomaterials to treat low-permeability oil and gas reservoirs with water locking effect, and the effect is limited, so they cannot be well applied to low-permeability oil and gas reservoirs

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
  • Strong gas-wetting nanosilicon dioxide water block removal agent, preparation method thereof and method for wetting transition of rock surface
  • Strong gas-wetting nanosilicon dioxide water block removal agent, preparation method thereof and method for wetting transition of rock surface
  • Strong gas-wetting nanosilicon dioxide water block removal agent, preparation method thereof and method for wetting transition of rock surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Technical scheme of the present invention is as follows:

[0013] A modified nano silicon dioxide dehydration locking agent, the mass percentage of raw materials is composed as follows:

[0014]

[0015] The remainder is water;

[0016] The modified nano-silica is: using a fluorocarbon surfactant aqueous solution with a mass fraction of 0.05% to 0.3% as a modification treatment solution, and modifying the surface of the nano-silica particles at a temperature of 65-75°C Obtain; Wherein, described fluorocarbon surfactant is perfluoroethyl acrylate, general formula is as follows:

[0017] CF 3 CF 2 (CF 2 ) k CH 2 CH 2 OOCCR=CH 2

[0018] Where K is an integer of 1-20, R is H or CH 3 . Preferably, K is an integer of 5-10, and R is H.

[0019] Preferably according to the present invention, the mass ratio of nano silicon dioxide:modification treatment liquid=(1~2):10.

[0020] The above-mentioned perfluoroethyl acrylate is a non-ionic fluorocarbon surfactant, ...

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
sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a strong gas-wetting nanosilicon dioxide water block removal agent, a preparation method thereof and a method for wetting transition of rock surface. The modified nanosilicon dioxide water block removal agent comprises the following raw materials: 0.1-0.5% of modified nanosilicon dioxide, 0.5-1% of an emulsifying agent OP-10, 0.5-1% of lauryl sodium sulfate, 25-50% of ethyl alcohol and the balance of water; the nanosilicon dioxide modified treating fluid is 0.05-0.3% of a non-ionic fluorocarbon surfactant water solution. The invention further provides a preparation method and application of the modified nanosilicon dioxide water block removal agent. The modified nanosilicon dioxide material has a super-hydrophobic and super-oleophobic property, can be used for changing the liquid-wetting property of the rock surface into strong gas-wetting property, so as to reduce the viscous resistance of fluid flowing on the rock surface, improve the flowing status of fluid in a porous medium, remove water blocking damage, is used for low-permeability oil and gas field exploitation and increasing of the oil and gas recovery ratio.

Description

technical field [0001] The invention relates to a water-dissolving and locking agent of strong gas-wettable nano-silica modified by a fluorocarbon surfactant, a preparation method thereof and a rock surface wetting reversal method, belonging to the technical field of low-permeability oil and gas field exploitation. Background technique [0002] The distribution of low-permeability oil and gas resources in my country has the characteristics of rich oil and gas, various types of oil and gas reservoirs, wide distribution area, and "gas in the upper part and oil in the lower part, mainly marine gas and continental oil and gas". At present, the proved reserves of low-permeability oil and gas reservoirs account for more than 2 / 3 of the total oil and gas reserves in the country. As my country's major oil fields have entered the middle and late stages of development and energy is in short supply, it is of key strategic significance to vigorously develop low-permeability oil and gas 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 Applications(China)
IPC IPC(8): C09K8/584C09K8/594
CPCC09K8/584C09K8/594
Inventor 王彦玲金家锋刘飞任金恒王坤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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