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Modified MoS2 nano material and preparation method thereof

A nano-material and modification technology, applied in the field of modified MoS2 nano-material and its preparation, can solve the problems of low oil recovery, high cost, environmental pollution, etc.

Active Publication Date: 2019-06-28
侯吉瑞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tertiary oil recovery is an important stage to slow down the aging speed of most oil fields, maintain crude oil production, and increase oil recovery rate. However, problems such as environmental pollution and high cost in the extraction process have always been important obstacles restricting the development of tertiary oil recovery.
However, in order to obtain high oil recovery (for example, about 20%), these reagents need to be used in a relatively high amount, and the adsorption on the rock after use may change the reservoir properties. Therefore, the existing surfactants and polymers There are problems such as high cost and environmental pollution in the oil recovery process of nanofluids
[0005] Also disclosed in the prior art is the use of metal oxide-based nanoparticles in the tertiary oil recovery stage to carry out the remaining oil recovery scheme (Hendraningrat L, Li S, Torscter O.A coreflood investigation ofnanofluid enhanced oil recovery.J.Pet.Sci.Eng., 2013, 111:128-138), however its oil recovery rate is less than 5%

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  • Modified MoS2 nano material and preparation method thereof
  • Modified MoS2 nano material and preparation method thereof
  • Modified MoS2 nano material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] This embodiment provides a kind of hydrophilic MoS 2 Nanosheets, the specific preparation method is as follows:

[0081] 1) ammonium molybdate, potassium thiocyanate and potassium borohydride are added in water to obtain a reaction mixture, wherein, in every 100mL of water, the amount of ammonium molybdate is 70mmol, the amount of potassium thiocyanate is 140mmol, and the amount of potassium borohydride is 1mol;

[0082] 2) Put the reaction mixture into a hydrothermal reaction kettle, heat the hydrothermal reaction kettle with an oil bath, and stir the above reaction mixture at a speed of 450 rpm for 1-3 hours at a pressure of 3 bar and a temperature of 200°C;

[0083] 3) Then the above reaction mixture was continued to react at 180°C for 12 hours under 3 bar pressure, the obtained precipitate was cooled to room temperature, washed with water and ethanol, and then dried at 80°C to obtain hydrophilic MoS 2 Nanosheets.

[0084] This embodiment further provides a modifi...

Embodiment 2

[0096] Preparation of nanofluid a: the obtained modified MoS 2 The nanomaterials were mixed with the stabilizer polyvinylpyrrolidone in deionized water; among them, every 100mL of deionized water, the modified MoS 2 The quality of the nanomaterial is 500ppm (ie 0.05wt.%), the quality of the stabilizer is 1000ppm, and the nanofluid is named as a.

[0097] Preparation of nanofluid b: The steps for preparing nanofluid b are the same as those for nanofluid a, except that the modified MoS 2 The quality of the nanometer material is 1000ppm (ie 0.1wt.%), the quality of the stabilizer is 100ppm, and the stabilizer is sodium polystyrene sulfonate.

[0098] Preparation of nanofluid c: The steps for preparing nanofluid c are the same as those for nanofluid a, except that the modified MoS 2 The quality of the nanometer material is 50ppm (ie 0.005wt.%), the quality of the stabilizer is 50ppm, and the stabilizer is an alkyl polyoxyethylene ether.

[0099] Preparation of nanofluid c-1: Th...

Embodiment 3

[0129] This example provides a modified MoS 2 Nanomaterials, the specific preparation method is as follows:

[0130] 1) the hydrophilic MoS provided by embodiment 1 2 The nanosheets were added to the absolute ethanol solution of butylamine, and stirred at 60 rpm for 15 hours at 25°C to obtain precipitation; among them, in every 100mL of absolute ethanol, the hydrophilic MoS 2 The amount of nanosheets is 5g, and the amount of butylamine is 1g;

[0131] 2) Wash the precipitate obtained in step 1) with water and ethanol, and then dry it at 80°C for about 6 hours to obtain modified MoS 2 nanomaterials.

[0132] Table 4 Analysis and summary of core displacement experiments under various core permeability and oil viscosity

[0133]

[0134] Test the modified MoS of this example 2 The performance of nanomaterials to enhance oil recovery, the specific process is as follows: Figure 12 The displacement experiments were carried out in the displacement equipment shown. The core...

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Abstract

The invention provides a modified MoS2 nano material and a preparation method thereof. The modified MoS2 nano material is obtained by making an alkyl amine chain grafted onto the surface of a hydrophilic MoS2 nanosheet. The preparation method comprises the steps that a hydrophilic MoS2 nanosheet is added in an organic solution of an alkylamine compound to be stirred, and the obtained precipitationis the modified MoS2 nano material; in every 100 mL of organic solution, the amount of the hydrophilic MoS2 nanosheet is 1-10 g, and the amount of alkylamine compounds is 0.1-5 g. The invention further provides a nanofluid containing the modified MoS2 nanosheet, the hydrophilic MoS2 nanosheet used for preparing the modified MoS2 nanomaterial and a preparation method thereof. The modified MoS2 nano material can be applied to tertiary oil recovery in the oil industry by preparing the nanofluid which is an oil displacement agent solution at the low concentration, the environmental pollution in the tertiary process is greatly reduced, the production cost is lowered, and the oil recovery is increased.

Description

technical field [0001] The present invention relates to a nanomaterial and its preparation method, in particular to a modified MoS 2 (Molybdenum disulfide) nanomaterial and preparation method thereof. Background technique [0002] According to the forecast of the International Energy Agency, the future growth of global oil demand will remain strong. The current oil price keeps rising, and it is urgent to find a feasible way to improve the feasibility and economy of oil production. [0003] The oil extraction process is generally divided into three stages. The primary oil recovery stage mainly relies on the energy of the formation itself to drive the flow of oil underground; as the energy of the formation decreases, it is necessary to inject an aqueous solution (or gas, etc.) of salt into the oil layer on the ground to drive the oil out. , called secondary oil recovery, about 40% of the oil can be recovered in the primary oil recovery stage and the secondary oil recovery st...

Claims

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Application Information

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IPC IPC(8): C09K8/58C09K8/584B82Y30/00B82Y40/00C07C209/00C07C211/07C07F13/00
Inventor 不公告发明人
Owner 侯吉瑞
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