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Hydrophobic nano silica emulsified water plugging agent and preparation method and application thereof

A technology of nano-silica and hydrophobicity, applied in the field of hydrophobic nano-silica emulsified water-blocking agent and its preparation, hydrophobic nano-silica emulsified water-blocking agent, can solve the problem of difficult implementation and complex composition of water-blocking agent and other problems, to achieve the effect of simple composition and high plugging strength

Inactive Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a hydrophobic nano-silicon dioxide emulsified water-blocking agent in order to obtain a water-blocking agent with good emulsion stability and high viscosity and to overcome the defects of complex composition and difficult implementation of the water-blocking agent in the prior art. Agents and their preparation methods and applications

Method used

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  • Hydrophobic nano silica emulsified water plugging agent and preparation method and application thereof
  • Hydrophobic nano silica emulsified water plugging agent and preparation method and application thereof

Examples

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Embodiment 1

[0030] This example is used to illustrate the hydrophobic nano-silica emulsified water blocking agent and its application provided by the present invention.

[0031] Hydrophobic nano-silica (average particle size of nano-particles is about 10nm, surface modification type is methyl, product of Sigma-Aldrich, USA) is mixed with ester to prepare hydrophobic nano-silica emulsified water blocking agent, in which each group See Table 1 for sub-names and contents.

[0032] The hydrophobic nano-silica emulsified water blocking agent, crude oil (density about 0.91g / mL, viscosity about 60mPa·s at 50°C) and water were vigorously mixed with an oscillating mixer to form an emulsion. The prepared emulsion was placed in an oven at a constant temperature of 80°C and sealed for 48 hours. The results of crude oil weight, water weight, water shutoff agent dosage, emulsion stability observation and viscosity measurement are shown in Table 1.

Embodiment 2

[0034] This example is used to illustrate the hydrophobic nano-silica emulsified water blocking agent and its application provided by the present invention.

[0035] According to the method of Example 1, the specific names and contents of each component, the weight of crude oil, the weight of water, the amount of water blocking agent, and the results of observing the stability of the emulsion and measuring the viscosity are shown in Table 1.

Embodiment 3

[0037] This example is used to illustrate the hydrophobic nano-silica emulsified water blocking agent and its application provided by the present invention.

[0038] According to the method of Example 1, the specific names and contents of each component, the weight of crude oil, the weight of water, the amount of water blocking agent, and the results of observing the stability of the emulsion and measuring the viscosity are shown in Table 1.

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Abstract

The invention discloses a hydrophobic nano silica emulsified water plugging agent and a preparation method and an application thereof. The hydrophobic nano silica emulsified water plugging agent contains hydrophobic nano silica and ester with the structural formula of R1COOR2, with the total weight of the hydrophobic nano silica emulsified water plugging agent as a benchmark, the content of the hydrophobic nano silica is 0.5-20 wt%, and the content of the ester is 80-99.5 wt%, wherein R1 is C1-C20 alkyl group, and R2 is C1-C10 alkyl group. The hydrophobic nano silica emulsified water plugging agent is applied to crude oil, can obtain a uniform and stable emulsion with relatively high viscosity, and has relatively high plugging property; and moreover, the water plugging agent is simple in composition and is easily implemented in an oil field.

Description

technical field [0001] The present invention relates to a hydrophobic nano-silica emulsified water shut-off agent and its preparation method and application, in particular to a hydrophobic nano-silica emulsified water shut-off agent used for water shutoff and profile control in oil well development, and The method for preparing the hydrophobic nano silicon dioxide emulsified water shutoff agent, and the application of the hydrophobic nano silicon dioxide emulsified water shutoff agent in oil wells for water shutoff. Background technique [0002] In the process of oilfield development, water plugging and profile control is an important technical means to "stabilize oil and control water". At present, there are two main types of water plugging agents for oil wells, one is non-selective plugging agents, and the other is selective plugging agents. Since the non-selective plugging agent has no selectivity, it is easy to cause damage to the oil layer in the multi-layer developmen...

Claims

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Application Information

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IPC IPC(8): C09K8/506
Inventor 罗咏涛侯钰
Owner CHINA PETROLEUM & CHEM CORP