Preparation method of amphiphilic graphene type oil displacement material

A graphene and oil displacement technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems affecting oil displacement effect, poor coalescence stability, affecting graphene interface properties, etc.

Active Publication Date: 2021-08-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong π-π and hydrophobic interactions between graphene particles, the coalescence stability between graphene particles is poor, and graphene particles gradually coalesce under long-term storage or high temperature and high salt conditions. Form larger particles and cause sedimentation, which will significantly affect the interfacial properties of graphene, thereby affecting its oil displacement effect

Method used

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  • Preparation method of amphiphilic graphene type oil displacement material
  • Preparation method of amphiphilic graphene type oil displacement material
  • Preparation method of amphiphilic graphene type oil displacement material

Examples

Experimental program
Comparison scheme
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specific Embodiment approach

[0031] The experimental methods used in the following examples are conventional methods unless otherwise specified.

[0032] The graphene oxide used in the following examples is an industrial sample produced by Shanghai Yaotian New Material Technology Co., Ltd. Other materials, reagents, etc., unless otherwise specified, can be obtained from commercial sources.

[0033] The present invention will be further described below in conjunction with specific examples, but the protection scope of the present invention is not limited thereto.

Embodiment 1

[0035] 5g cetylamine is added in 75g kerosene to obtain oil phase, 1g graphene oxide (particle size is 600nm), 7g hydrophilic modifier A (m is 3) is added in 250g deionized water to obtain water phase, oil phase, The water phase was added to a four-neck glass bottle equipped with a stirrer, a nitrogen pipe, a spherical condenser and a thermometer, the stirring speed was controlled at 700rpm, and nitrogen gas was introduced for 30min, and 0.5g of cerium ammonium nitrate and 0.2g of ethylenediaminetetraacetic acid were added. Disodium, the reaction temperature is controlled at 30°C, and the reaction time is 24 hours. The product is centrifuged, washed with ethanol, dried, and crushed to obtain an amphiphilic graphene oil-displacing agent.

Embodiment 2

[0037] As described in Example 1, the difference is that the hydrophobic modifier is octadecylamine.

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Abstract

The invention relates to a preparation method of an amphiphilic graphene type oil displacement material, and belongs to the technical field of oilfield chemistry. The preparation method comprises the following steps: carrying out asymmetric modification on nano graphene oxide by utilizing an interface reaction method to prepare a Janus amphiphilic nano graphene material; wherein the hydrophobic side modification is realized by utilizing reaction of long-chain organic amine and epoxy groups on the surface of the graphene oxide, and the hydrophilic side modification is realized by utilizing cerium salt as an initiator and a compound containing a polyoxyethylene chain segment as a monomer through a grafting reaction on the surface of the graphene oxide. The nano graphene oil displacement material has the advantages of small dispersion difficulty, good salt and temperature resistance, excellent long-term dispersion stability, small dosage, good oil displacement effect and the like, and can be used as a high-temperature and high-salt oil reservoir oil displacement agent.

Description

technical field [0001] The invention relates to a preparation method of an amphiphilic graphene type oil displacement material, belonging to the technical field of oil field chemistry. Background technique [0002] Petroleum is one of the most important basic energy and raw materials for industrial production and people's life. Its exploitation and utilization play an important role in the development of modern society. At present, due to the limitation of domestic petroleum geological reserves and the difficulty of development, my country's crude oil supply is heavily dependent on imports, which threatens national energy security. Increasing crude oil recovery through innovative technical means is one of the important ways to ensure national energy security. Traditional chemical flooding technologies, including polymer flooding, surfactant flooding, composite flooding, etc., have been widely used and achieved certain results. However, in the application process, various che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F216/18C08F220/28C09K8/58
CPCC08F292/00C09K8/58C09K2208/10C08F216/18C08F220/286
Inventor 王佳吕开河曹杰孙明波陈英鹏徐国彬王新铭石春晓
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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