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Novel hydrophobic modified nano-silicon material

A technology of hydrophobic modification and nano-silicon, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of high price, high cost, hidden dangers, etc., and achieve the effect of high transparency and good stability

Inactive Publication Date: 2012-06-20
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This product can increase the water injection volume to meet the injection requirements, but the price of the product is expensive, as high as 4000-5000 yuan per kilogram, and diesel must be used as the carrier fluid to further increase the cost. The product has been tested on 4 water injection wells in China. The effect is better than conventional acidification, and the validity period is more than 1 year
Shengli Oilfield also developed a similar product in 2003, and its carrier fluid also uses diesel oil with a high cost, and there are also potential safety hazards in on-site construction
The cost of field tests of domestic and Russian products is relatively high, and there are safety hazards in field construction, and they have not been applied to polymer injection wells and ASP flooding injection wells

Method used

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  • Novel hydrophobic modified nano-silicon material
  • Novel hydrophobic modified nano-silicon material
  • Novel hydrophobic modified nano-silicon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Add 100 grams of water-dispersed nano-silicon (Jiangsu Yutong Chemical Co., Ltd.) into absolute ethanol to make the concentration of nano-silicon reach 5%, stir for 30 minutes, heat up to 45°C, and add kh550 type silane coupler dropwise at a ratio of 2% of the mass of nano-silicon. Joint agent (Nanjing Aocheng Chemical Co., Ltd.) ethanol solution, the concentration of the solution is 1%, stir for 4 hours, adjust the pH value to 8 with NaOH, continue stirring for 30 minutes, raise the temperature to 45°C, and add 1% dropwise Octadecyltrimethoxysilane (Hangzhou Sloan Materials Co., Ltd.) ethanol solution 20ml, and kept at constant temperature for 45 minutes, then stirred and reacted for 6 hours to obtain a hydrophobically modified nano silicon ethanol aqueous solution product.

[0012] Below by the wetting angle measuring instrument, the product of embodiment 1 is measured on the effect of the core slice at different concentrations, and the wetting effect of the hydrophobi...

Embodiment 2

[0021] Add water-dispersed nano-silicon to absolute ethanol to make the concentration of nano-silicon reach 1%, stir for 30 minutes, heat up to 45°C, add dropwise kh550 silane coupling agent ethanol solution with 0.5% nano-silicon mass, and stir for 4 hours; Adjust the pH value to 8, stir for 30 minutes, heat up to 45°C, add 10ml of 1% hexadecyltrimethoxysilane ethanol solution dropwise, and keep the temperature for 45 minutes, then stir and react for 4 hours to obtain hydrophobic modification Nano silicon ethanol aqueous solution product.

Embodiment 3

[0023] Add water-dispersed nano-silicon to absolute ethanol to make the concentration of nano-silicon reach 3%, stir for 30 minutes, heat up to 45°C, add dropwise kh550 silane coupling agent ethanol solution with 1% nano-silicon mass, and stir for 4 hours; Adjust the pH value to 8, stir for 30 minutes, heat up to 45°C, add 15ml of 1% hexadecyltrimethoxysilane ethanol solution dropwise, and keep the temperature for 45 minutes, then stir and react for 4 hours to obtain hydrophobic modification Nano silicon ethanol aqueous solution product.

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Abstract

The invention discloses a novel hydrophobic modified nano-silicon material, aiming to solve the problem that the oil field injecting nano-silica material can not be applied to the polymer injection well and the alkaline-surfactant-polymer flooding injection well. The novel hydrophobic modified nano-silicon material is prepared according to the following steps: adding absolute alcohol into water-dispersible nano-silicon, dropwise adding the ethanol solution of silane coupling agent, and finally dropwise adding 1% of the ethanol solution of trimethoxyoctadecylsilane, wherein the mass of the ethanol solution of silane coupling agent is 0.5-2% of that of the nano-silicon. The novel hydrophobic modified nano-silicon material can be uniformly dispersed into a variety of solvent media including water, isopropyl alcohol, ethanol, ethylene glycol, xylene and acetone and can form a super-hydrophobic layer on the surface of the rock core.

Description

technical field [0001] The invention relates to a new material for oilfields, which is applied to water injection wells, polymer injection wells and ASP flooding injection wells, so as to achieve the purpose of increasing injection. Background technique [0002] The ASP flooding in domestic oilfields mainly adopts the technical measures of oxidation plugging removal to achieve the purpose of increasing the injection, and the application in some areas has the problems of short effective period and limited injection volume. Russia is the first country to research super-oleophilic nano-silica and use it to improve water injection development in oilfields. Its products are white powders mainly composed of silicon dioxide with a particle size of 5-500nm. The particles of this powder have an extensible surface, which can be changed by using new technology to make it hydrophobic and lipophilic, thus changing its chemical properties, which cannot be achieved with traditional hydrop...

Claims

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Application Information

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IPC IPC(8): C09K8/58
Inventor 李晓东徐方俊刘桂芳沈治波王俊巍
Owner BC P INC CHINA NAT PETROLEUM CORP
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