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Nanometer titanium dioxide solid particle emulsifier and preparation method thereof

A nano-titanium dioxide, solid particle technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of narrow application range, low emulsion phase transition point, etc., and achieve the effect of strong industrializability and simple synthesis method.

Active Publication Date: 2022-07-12
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on the formation of emulsions with single nanoparticles, and most of them use the synergistic effect of surfactants and nanoparticles to generate emulsions
At the same time, the phase transition point of the final emulsion formed is relatively low, and the scope of application is relatively narrow

Method used

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  • Nanometer titanium dioxide solid particle emulsifier and preparation method thereof
  • Nanometer titanium dioxide solid particle emulsifier and preparation method thereof
  • Nanometer titanium dioxide solid particle emulsifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 100 g of absolute ethanol and 3 g of hydrophilic titanium dioxide to the reagent bottle, and ultrasonically prepare the dispersion for 30 minutes.

[0024] (2) Add 0.3 g of isopropyl tris (dioctyl pyrophosphate acyloxy) titanate (purchased by Nanjing Nengde New Material Technology Co., Ltd.) into the dispersion, and put it into an oil bath at 65°C Heat and stir for 12 hours.

[0025] (3) in the dispersion liquid in the step 2, drip 3g bromododecan, shake the reagent bottle in the dripping process, ensure that the reaction system is mixed evenly; After the end, the product is subjected to suction filtration, washing treatment, drying and grinding to obtain the nano solid particle emulsifier S1.

Embodiment 2

[0027] (1) Add 100 g of absolute ethanol and 3 g of hydrophilic titanium dioxide to the reagent bottle, and ultrasonically prepare the dispersion for 30 minutes.

[0028] (2) 0.3 g of bis(dioctyl pyrophosphate acyloxy) ethylene titanate (purchased by Nanjing Nengde New Material Technology Co., Ltd.) was added to the dispersion, and heated in an oil bath at 65°C and stirred for 12 hours.

[0029] (3) 3g of bromododecan was added dropwise to the dispersion in step 2, and the reagent bottle was shaken during the dropwise addition to ensure that the reaction system was evenly mixed; put into an oil bath at 65°C and heated and stirred for 12 hours. After the reaction, the product is subjected to suction filtration, washing treatment, drying and grinding to obtain nano solid particle emulsifier S2.

Embodiment 3

[0031] (1) Add 100 g of absolute ethanol and 3 g of hydrophilic titanium dioxide to the reagent bottle, and ultrasonically prepare the dispersion for 30 minutes.

[0032] (2) 0.3 g of isopropoxydioleic acid acyloxy (dioctyl phosphoric acid acyloxy) titanate (purchased by Nanjing Nengde New Material Technology Co., Ltd.) was added to the dispersion liquid, and put into 65°C Heat and stir in an oil bath for 12 hours.

[0033] (3) 3g of bromohexadecane was added dropwise to the dispersion in step 2, and the reagent bottle was shaken during the dropwise addition to ensure that the reaction system was evenly mixed; put into an oil bath at 65°C and heated and stirred for 12 hours. After the reaction, the product is subjected to suction filtration, washing treatment, drying and grinding to obtain nano solid particle emulsifier S3.

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Abstract

The invention provides a nano titanium dioxide solid particle emulsifier and a preparation method thereof. The nano titanium dioxide solid particle emulsifier is prepared by the method comprising the following steps: dissolving titanium dioxide in absolute ethyl alcohol, and performing ultrasonic treatment to obtain dispersion liquid; adding a phthalic ester coupling agent into the dispersion liquid for chemical grafting; adding a certain amount of brominated alkane after heating and stirring for a period of time, and heating and stirring for a period of time; and after heating and stirring, carrying out suction filtration and drying to obtain the nano oleophylic titanium dioxide solid particle emulsifier. The nano emulsifier can form a stable water-in-oil emulsion under the condition that the water saturation of an oil reservoir is 10-80% through the shearing action of a stratum, the viscosity of the emulsion is 1.5-22 times that of crude oil, and the viscosity of the emulsion is in direct proportion to the water saturation of the oil reservoir within the range of the water saturation of the oil reservoir; the high-viscosity emulsion formed under the condition of high water content can block a dominant channel so as to achieve the purposes of controlling the fluidity and stabilizing the displacement front edge, and the crude oil recovery rate is improved.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to a nano titanium dioxide solid particle emulsifier capable of forming a high internal phase and high viscosity emulsion in a high permeability zone of an oil reservoir and a preparation method thereof. Background technique [0002] In heterogeneous oil reservoirs, water flooding will lead to severe fingering, that is, affected by the heterogeneity within the layer and the difference in oil-water viscosity, the seepage rate of injected water is much faster than that of crude oil. A dominant channel is formed between the two parts, which eventually results in that most areas of the reservoir are not swept by water after water flooding [ALMANSOUR A O, ALQURAISHI A A, ALHUSSINAN SN, et al. Efficiency pf Enhanced Oil Recovery Using Polymer-ugmented LowSalinity Flooding [J]. Journal of Petroleum Exploration & Production Technology, 2017, 7(1):1149-1158.]. Conventional polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 李思颖蒲万芬田开平邹滨阳贺伟王红州
Owner SOUTHWEST PETROLEUM UNIV
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