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Nano SiO2 composite material thickened oil viscosity reducer and preparation method thereof

A thick oil viscosity reducer and composite material technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of waste of thin oil resources, strong selectivity, and low viscosity reduction rate of oil-soluble viscosity reducers , to achieve the effect of convenient storage and transportation, clean and pollution-free process, and easy mass production

Inactive Publication Date: 2015-02-04
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the remarkable characteristics of heavy oil, such as high viscosity, high freezing point and poor fluidity, severely limit the production and transportation of heavy oil.
[0003] At present, in the heavy oil viscosity reduction method applied or being studied at home and abroad, the heating viscosity reduction technology consumes a lot of electricity and costs high; The post-processing of the method is cumbersome and complicated, and the viscosity reduction rate of the oil-soluble viscosity reducer is low and the selectivity is strong
However, there is no nano-SiO 2 A report on the application of composite materials in viscous reduction of heavy oil

Method used

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  • Nano SiO2 composite material thickened oil viscosity reducer and preparation method thereof
  • Nano SiO2 composite material thickened oil viscosity reducer and preparation method thereof
  • Nano SiO2 composite material thickened oil viscosity reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Nano (polyoctadecyl methacrylate-acrylamide) / SiO 2 The preparation method, the steps are as follows:

[0028] (1) Silane coupling agent KH570 on nano-SiO 2 Surface premodification of

[0029] Add 50ml absolute ethanol, 1ml acetic acid, 1ml distilled water, 1ml γ -Methacryloxypropyltrimethoxysilane (KH570), under stirring at room temperature, hydrolyzed for 2h. Add 2.5g nano-SiO 2 , heated to 50°C, and reacted for 3h under vigorous stirring. The reaction product was centrifuged (4000rpm), washed several times with absolute ethanol, and dried in vacuum at 30°C for 10 hours to obtain the pre-modified product nano KH570 / SiO 2 .

[0030] (2) Octadecyl methacrylate and acrylamide in nano-SiO 2 surface graft copolymerization

[0031] Disperse 2 g of the pre-modified product evenly in absolute ethanol, add a certain amount of stearyl methacrylate and acrylamide (the molar ratio is 1:1, the total amount is 1 / 5 of the pre-modified product), stir to dissolve ...

Embodiment 2

[0039] Embodiment 2: Nano (polyoctadecyl methacrylate-acrylamide) / SiO 2 The preparation method, step is the same as example 1, and difference is in (2) step, and the mol ratio of stearyl methacrylate and acrylamide is 3:1. Test method and dosage are the same as example 1.

[0040] The results are shown in Table 1. At 40°C, add nano-SiO 2 After the composite material viscosity reducer, the kinematic viscosity of heavy oil is changed from 198.88mm 2 the s -1 down to 62.19mm 2 the s -1 , The viscosity reduction rate is 68.73%, which is slightly lower than the viscosity reduction effect of the viscosity reduction agent synthesized in Example 1.

[0041] Table 1 Nano-SiO 2 Viscosity reduction test results of composite material viscosity reducer

[0042]

[0043]

[0044] The commercially available viscosity reducer EVA in the table is ethylene-vinyl acetate copolymer, nano viscosity reducer 1 is the nanocomposite material viscosity reducer synthesized in Example 1, an...

Embodiment 3

[0045] Embodiment 3: Nano (polyhexadecyl methacrylate-acrylamide) / SiO 2 The preparation method, step is the same as embodiment 1, and difference is in (2) step, replaces stearyl methacrylate with hexadecyl methacrylate.

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Abstract

The invention discloses a nano SiO2 composite material thickened oil viscosity reducer and a preparation method thereof, which belongs to the technical field of nano SiO2 composite material preparation and application thereof. The viscosity reducer is nano (polymethacrylate higher alcohol-acrylamide) / SiO2 composite material. The preparation method comprises the following steps: 1)pre-modifying the surface of the nano SiO2 by a silane coupling agent; and 2)performing graft copolymerization of (methyl)acrylate higher alcohol and acrylamide on the surface of nano SiO2 to obtain the (polymethacrylate higher alcohol-acrylamide) / SiO2 composite material powder. The nano viscosity reducer has the advantages of good viscosity reducing effect, low cost, simple production and no pollution during a cleaning process. Through the experiment, the viscosity reducing rate of the nano viscosity reducer to the high wax thickened oil at Daqing dandong station is 72.10% at 40 DEG C.

Description

technical field [0001] The invention belongs to nano SiO 2 Composite material preparation technology and application field, especially related to a kind of nano-SiO 2 Composite heavy oil viscosity reducer and preparation method thereof. Background technique [0002] Heavy oil is an important part of the world's oil and gas resources. According to statistics, the reserves of heavy oil (including bitumen) in the world are about 10 11 tons, which is about six times that of proven light crude oil. With the less and less recoverable light crude oil and the continuous improvement of extraction technology, the exploitation of heavy oil resources has attracted more and more attention from all over the world. However, the significant characteristics of heavy oil, such as high viscosity, high freezing point and poor fluidity, severely limit the production and transportation of heavy oil. [0003] At present, in the heavy oil viscosity reduction method applied or being studied at h...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/18C08F220/56C09K8/588C09K8/524
Inventor 张长桥张宏民于帅于萍魏云鹤
Owner SHANDONG UNIV
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