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Water soluble nano-polysilicon/polymer gel oil-displacing-agent and preparation method thereof

An oil-displacing agent and polymer technology, applied in the field of water-soluble nano-polysilicon/polymer gel oil-displacing agent and its preparation, can solve the problem of threats to economic security and energy security, affecting oil-displacing performance, and poor shear resistance. and other problems, to achieve the effect of high modulus, increased swept volume, and good shear resistance

Active Publication Date: 2017-03-29
河南海博瑞硅材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the average recovery rate is only 28.9%, the average water content of the produced fluid has exceeded 90%, and most oil reservoirs are close to the abandonment period of water flooding. This has led to an increase in my country's dependence on foreign crude oil supply year by year, seriously threatening the country's economic security and energy. Safety
[0003] Polymer flooding is one of the main oil displacement technologies in tertiary oil recovery. Partially hydrolyzed linear polyacrylamide is the most widely used in polymer flooding, mainly because it can increase the viscosity of the aqueous solution to increase the displacement of the displacement fluid. However, linear polyacrylamide has the disadvantages of being easy to degrade, not resistant to temperature and salt, and poor shear resistance in field application, which causes its viscosity to decrease during use and affects the driving force. oil properties

Method used

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  • Water soluble nano-polysilicon/polymer gel oil-displacing-agent and preparation method thereof
  • Water soluble nano-polysilicon/polymer gel oil-displacing-agent and preparation method thereof
  • Water soluble nano-polysilicon/polymer gel oil-displacing-agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] A kind of preparation method of water-soluble nano polysilicon / polymer gel oil displacement agent, it specifically comprises the following steps:

[0030] 1) Dissolve 4 parts of 2-acrylamide-2-methylpropanesulfonic acid in 50 parts of deionized water, add dropwise sodium hydroxide solution to neutralize to pH 8 to obtain solution A;

[0031] 2) Dissolve 5 parts of acrylamide and 0.3 part of sodium dodecylsulfonate in 45 parts of deionized water to obtain solution B;

[0032] 3) After mixing solution A and solution B, add 0.05 parts of reactive nano-polysilicon RNS-D and mix well, then transfer to a four-necked flask; 2 Stir for 30 minutes to allow the 2 Then add 0.15 parts of ammonium persulfate into the four-neck flask, raise the temperature to 85 °C and keep it warm for 8 hours to obtain a viscous gel oil displacement agent.

[0033] figure 1 In order to prepare the optical photograph of the obtained water-soluble nano polysilicon / polymer gel oil displacement agent...

Embodiment 2

[0044] A kind of preparation method of water-soluble nano polysilicon / polymer gel oil displacement agent, it specifically comprises the following steps:

[0045] 1) Dissolve 2 parts of 2-acrylamide-2-methylpropanesulfonic acid in 40 parts of deionized water, add dropwise sodium hydroxide solution to neutralize to pH 6 to obtain solution A;

[0046] 2) Dissolve 5 parts of acrylamide and 0.2 parts of sodium dodecylsulfonate in 30 parts of deionized water to obtain solution B;

[0047] 3) After mixing solution A and solution B, add 0.01 part of reactive nano-polysilicon RNS-D and mix evenly, then transfer it into a four-neck flask; 2 Stir for 30 minutes to allow the 2 Then add 0.05 parts of ammonium persulfate into the four-neck flask, raise the temperature to 70 °C and keep it warm for 8 hours to obtain a viscous gel oil displacement agent.

Embodiment 3

[0049] A kind of preparation method of water-soluble nano polysilicon / polymer gel oil displacement agent, it specifically comprises the following steps:

[0050] 1) Dissolve 2 parts of 2-acrylamide-2-methylpropanesulfonic acid in 45 parts of deionized water, add dropwise sodium hydroxide solution to neutralize to pH 9 to obtain solution A;

[0051] 2) Dissolve 6 parts of acrylamide and 0.2 parts of sodium dodecylsulfonate in 40 parts of deionized water to obtain solution B;

[0052] 3) After mixing solution A and solution B, add 0.15 parts of reactive nano-polysilicon RNS-D and mix well, then transfer to a four-neck flask; 2 Stir for 30 minutes to allow the 2 Then add 0.09 parts of ammonium persulfate into the four-neck flask, raise the temperature to 75 °C and keep it warm for 10 hours to obtain a viscous gel oil displacement agent.

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Abstract

The invention discloses a water soluble nano-polysilicon / polymer gel oil-displacing-agent. The water soluble nano-polysilicon / polymer gel oil-displacing-agent mainly comprises, by weight, 2-5 parts of 2-acrylamide-2-methylpro panesulfonic acid, 5-8 parts of acrylamide, 0.2-0.5 part of sodium dodecylsulphate, 0.01-0.50 part of reactive nano-polysilicon RNS-D, 0.05-0.25 part of ammonium peroxydisulfate and 70-110 parts of deionized water. The water soluble nano-polysilicon / polymer gel oil-displacing-agent has a good rheological property, good temperature resistant and anti-shear properties, can play the function of enlarging a sweep volume in an oil deposit, and improving a mobility ratio. The water soluble nano-polysilicon / polymer gel oil-displacing-agent can greatly enhance the recovery ratio.

Description

technical field [0001] The invention belongs to the technical field of oil displacement agents used in tertiary oil recovery, and in particular relates to a water-soluble nano polysilicon / polymer gel oil displacement agent and a preparation method thereof. Background technique [0002] As an important high-quality energy source and basic chemical raw material, the demand for petroleum is increasing day by day. However, the newly added oil and gas reserves in my country are of low grade and lack of succession, and the main domestic oil fields are already in the development period of high water cut and ultra-high water cut. Although the average recovery rate is only 28.9%, the average water content of the produced fluid has exceeded 90%, and most oil reservoirs are close to the abandonment period of water flooding, which leads to the increasing dependence of my country's crude oil supply on foreign countries, seriously threatening the country's economic security and energy. Sa...

Claims

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Application Information

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IPC IPC(8): C08F283/12C08F220/56C08F220/58C09K8/588
CPCC08F283/124C09K8/588C08F220/585
Inventor 张治军程亚敏李小红
Owner 河南海博瑞硅材料科技有限公司
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