CN102504787A - Novel hydrophobic modified nano-silicon material - Google Patents
Novel hydrophobic modified nano-silicon material Download PDFInfo
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- CN102504787A CN102504787A CN2011103113012A CN201110311301A CN102504787A CN 102504787 A CN102504787 A CN 102504787A CN 2011103113012 A CN2011103113012 A CN 2011103113012A CN 201110311301 A CN201110311301 A CN 201110311301A CN 102504787 A CN102504787 A CN 102504787A
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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
The present invention relates to a kind of oil field and use novel material, this novel material is applied to WIW, injection well, ternary composite driving injection well, thereby realizes the purpose of augmented injection.
Background technology
The ternary composite driving in domestic oil field mainly adopts the measure of oxidation block releasing technique to realize the augmented injection purpose, and some regional application exists validity period weak point, the limited problem of augmented injection amount.Russia is the country of studying excess of export oleophylic nano silicon the earliest and being used to improve water flooding.Its product is white powder main, particle diameter 5-500nm with silicon-dioxide.This particles of powder has the surface that can extend, makes it obtain the hydrophobic oleophilicity through using new technology, thereby changes its chemical property, and this is to be beyond one's reach with traditional hydrophobic lipophilic material.This product can improve water injection rate and reach the injection allocation requirement; But costing an arm and a leg of product; Per kilogram is first up to 4000-5000, and must use diesel oil further to increase cost as transport fluid, and its product has carried out 4 mouthfuls of WIW test in places at home; Effect is more effective than conventional acidifying, is valid up to more than 1 year.Shengli Oil Field was also developed like product in 2003, its transport fluid also adopts the higher diesel oil of cost, and also there is potential safety hazard in site operation.The cost of domestic and Muscovite product test in place is higher, and there is potential safety hazard in site operation, and is not applied to injection well and ternary composite driving injection well.
Summary of the invention
The purpose of this invention is to provide a kind of novel hydrophobically modified nano silicon material, can realize effectively that ternary composite driving injects the step-down augmented injection of well, injection well and WIW.
For realizing the foregoing invention purpose, the technical scheme that the application adopts is: a kind of novel hydrophobically modified nano silicon material, and its preparation method is: in the aqueous dispersion type nano-silicon, add absolute ethyl alcohol; Make the concentration of nano-silicon reach 1%-5%; Stirred 30 minutes, and be warming up to 45 ℃, drip the silane coupling agent ethanolic soln of nano-silicon quality 0.5%-2%; The concentration of this silane coupling agent ethanolic soln is 1%, stirring reaction 4 hours; The pH value is transferred to 8, stirs 30 minutes, is warming up to 45 ℃, and dropping content is 1% octadecyl Trimethoxy silane ethanolic soln 10-20ml, and keeps constant temperature 45 minutes, stirring reaction 4-6 hour then, obtains hydrophobically modified nano-silicon aqueous ethanolic solution product.
Beneficial effect of the present invention: novel hydrophobically modified nano silicon material of the present invention; Be to be unit with the single nanoparticle; Evenly spread in the multiple solvent mediums such as water, Virahol, ethanol, terepthaloyl moietie, YLENE, acetone the dispersion liquid that in solvent, is uniformly dispersed and obtains.Good stability, transparency height only need simple the mixing, just can fully disperse, and can be at the surperficial film relatively uniformly that forms of core.The hydrophobic grouping of outside stretching, extension to be arranged behind the core surface filming, make it have super-hydrophobicity.Use this product that ternary composite driving is injected well and handle, after the injection well carries out the anti-row of de-plugging, nano silicon material is injected.The nano silicon material of annotating the stratum affacts rock surface, forms super-hydrophobic layer, thereby plays step-down augmented injection effect.
Description of drawings
Fig. 1 annotates ternary hydraulic coupling curve.
Fig. 2 is that the hydrophobically modified nano silicon material is handled rock core ternary hydraulic coupling curve.
Embodiment
Below in conjunction with specific embodiment the present invention is further described.
Embodiment 1
100 gram aqueous dispersion type nano-silicons (space Tonghua, Jiangsu worker company) are added absolute ethyl alcohol, make nano-silicon concentration reach 5%, stirred 30 minutes; Be warming up to 45 ℃, in ratio dropping kh550 type silane coupling agent (the Nanjing really chemical company difficult to understand) ethanolic soln of nano-silicon quality 2%, the concentration of this solution is 1%; Stirring reaction 4 hours is transferred to 8 continued with NaOH with the pH value and was stirred 30 minutes, is warming up to 45 ℃; Dropping content is 1% octadecyl Trimethoxy silane (Hangzhou Si Long Materials Co., Ltd) ethanolic soln 20ml; And keeping constant temperature 45 minutes, stirring reaction is 6 hours then, obtains hydrophobically modified nano-silicon aqueous ethanolic solution product.
Through the measurement and determination of humidifying angle appearance product of embodiment 1 is measured the effect of rock core sheet when the different concns below; Confirm the wetting effect of hydrophobically modified nano silicon material; Concrete outcome is seen table 1, and wherein the big more explanation hydrophobically modified of wetting angle nano silicon material is good more to core sheet hydrophobically modified effect.
Concrete condition determination: the core sheet is taken from the natural core of southern 6-31-inspection P52; Determining instrument is a SL200 standard type contact angle instrument system.
Determination step:
1, print is prepared: get natural core and process 2 * 1 * 0.5cm print, 1 grade of polishing;
2, print is handled: print is immersed in the hydrophobically modified nano-silicon ethanolic soln of 0.05%-0.4% 1 minute, takes out water flushing 5 minutes, put into 50 ℃ of thermostat containers dry 2 hours, and subsequent use;
3, contact angle determination: print is placed on MODEL C201A contact angle and the interfacial tensimeter, drips 0.5 μ l behind the level-off, measure wetting angle.
The nano silicon material of table 1 embodiment 1 adopts the wetting angle effect after different concns is handled the core sheet
| Nm-Si concentration | 0.1% | 0.15% | 0.2% | 0.25% | 0.3% | 0.4% |
| Wetting angle (°) | 137.29 | 138.63 | 140.39 | 148.65 | 145.99 | 142.22 |
Embodiment 2
The aqueous dispersion type nano-silicon is added absolute ethyl alcohol, make nano-silicon concentration reach 1%, stirred 30 minutes, be warming up to 45 ℃, drip the kh550 type silane coupling agent ethanolic soln of nano-silicon quality 0.5%, stirring reaction 4 hours; The pH value is transferred to 8, stirred 30 minutes, be warming up to 45 ℃, drip the hexadecyl Trimethoxy silane ethanolic soln 10ml of 1% content, and kept constant temperature 45 minutes, stirring reaction is 4 hours then, obtains hydrophobically modified nano-silicon aqueous ethanolic solution product.
Embodiment 3
The aqueous dispersion type nano-silicon is added absolute ethyl alcohol, make nano-silicon concentration reach 3%, stirred 30 minutes, be warming up to 45 ℃, drip the kh550 type silane coupling agent ethanolic soln of nano-silicon quality 1%, stirring reaction 4 hours; The pH value is transferred to 8, stirred 30 minutes, be warming up to 45 ℃, drip the hexadecyl Trimethoxy silane ethanolic soln 15ml of 1% content, and kept constant temperature 45 minutes, stirring reaction is 4 hours then, obtains hydrophobically modified nano-silicon aqueous ethanolic solution product.
Embodiment 4
Hydrophobically modified nano-silicon antihypertensive effect is estimated: hydrophobically modified nano-silicon antihypertensive effect, see Fig. 1, Fig. 2 and table 2.
The measuring method of estimating: in the core driving device, core is packed in the rock core fastener, under the 0.2ml/min constant current conditions, measure the water phase permeability and the injection pressure of core with deionized water.Inject the ternary for preparing with the speed of 0.2ml/min then and drive solution (viscosity is between 30-40mPa.s) 10PV, measure injection pressure.After the de-plugging of Youxiaolin unblocking agent, carry out displacement to pH value between 7-8 with deionized water with the speed of 0.2ml/min.Inject the aqueous ethanolic solution of 0.5PV with the speed of 0.2ml/min; Again with the hydrophobically modified nano-silicon aqueous ethanolic solution 0.5PV of the speed implantation concentration 0.05%-0.3% of 0.2ml/min; Re-inject the aqueous ethanolic solution of 0.5PV with the speed of 0.2ml/min, and inject the deionized water of 1PV.Re-inject the ternary for preparing with the speed of 0.2ml/min and drive solution (viscosity is between 30-40mPa.s) 10PV; Measure hydrophobically modified nano-silicon aqueous ethanolic solution processing back core and annotate the injection pressure that ternary is driven solution once more, to confirm the antihypertensive effect of hydrophobically modified nano-silicon.
Natural core hydrophobically modified nano-silicon antihypertensive effect condition determination: the core sheet is taken from the natural core of southern 6-31-inspection P52; Wherein that 1 injection is ASP flooding solution (viscosity 34.8mPa.s); 2 that inject is polymers soln (viscosity 48.2mPa.s).
Combine Fig. 2 to find out by Fig. 1: carry out under the condition of equivalent contrasting before and after the nano-silicon modification, nano-silicon is handled the pressure that injects ternary liquid in the back and is reduced by 25%, and the effect of nano-silicon step-down is remarkable.
The natural core hydrophobically modified of table 2 nano-silicon antihypertensive effect
Can find out by table 2: be used for oil field injection well reduction injection pressure more than 20% from natural core injection ASP flooding solution or the hydrophobically modified nano-silicon of polymers soln evaluation result proof the present invention.
Claims (1)
1. novel hydrophobically modified nano silicon material; Its preparation method is: in the aqueous dispersion type nano-silicon, add absolute ethyl alcohol, make the concentration of nano-silicon reach 1%-5%, stirred 30 minutes; Be warming up to 45 ℃; Drip the silane coupling agent ethanolic soln of nano-silicon quality 0.5%-2%, the concentration of this silane coupling agent ethanolic soln is 1%, stirring reaction 4 hours; The pH value is transferred to 8, stirs 30 minutes, is warming up to 45 ℃, and dropping content is 1% octadecyl Trimethoxy silane ethanolic soln 10-20ml, and keeps constant temperature 45 minutes, makes in stirring reaction 4-6 hour then.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105001846A (en) * | 2015-07-01 | 2015-10-28 | 中国石油大学(华东) | Nano liquid for decompression and augmented injection of tight oil water-flooding and preparation method and application thereof |
| CN110066650A (en) * | 2018-01-23 | 2019-07-30 | 陕西一诺油气工程技术服务有限公司 | A kind of nano polysilicon lotion and its preparation method and application |
| CN113680137A (en) * | 2021-08-12 | 2021-11-23 | 安徽工业大学 | SiO with bionic micro/nano hierarchical structure2Super-hydrophobic filter material, preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1696240A (en) * | 2005-05-27 | 2005-11-16 | 北京交通大学 | Chemical oil displacement agent |
| CN101249963A (en) * | 2008-03-07 | 2008-08-27 | 南京工业大学 | Method for preparing super-hydrophobic silica by one-step process |
| CN101575478A (en) * | 2008-05-05 | 2009-11-11 | 中国科学院宁波材料技术与工程研究所 | Method for preparing epoxy resin super-hydrophobic coat |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1696240A (en) * | 2005-05-27 | 2005-11-16 | 北京交通大学 | Chemical oil displacement agent |
| CN101249963A (en) * | 2008-03-07 | 2008-08-27 | 南京工业大学 | Method for preparing super-hydrophobic silica by one-step process |
| CN101575478A (en) * | 2008-05-05 | 2009-11-11 | 中国科学院宁波材料技术与工程研究所 | Method for preparing epoxy resin super-hydrophobic coat |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105001846A (en) * | 2015-07-01 | 2015-10-28 | 中国石油大学(华东) | Nano liquid for decompression and augmented injection of tight oil water-flooding and preparation method and application thereof |
| CN105001846B (en) * | 2015-07-01 | 2018-06-19 | 中国石油大学(华东) | A kind of fine and close oily waterflooding extraction increasing injection nano fluid and preparation method and application |
| CN110066650A (en) * | 2018-01-23 | 2019-07-30 | 陕西一诺油气工程技术服务有限公司 | A kind of nano polysilicon lotion and its preparation method and application |
| CN113680137A (en) * | 2021-08-12 | 2021-11-23 | 安徽工业大学 | SiO with bionic micro/nano hierarchical structure2Super-hydrophobic filter material, preparation method and application thereof |
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Application publication date: 20120620 |