A kind of flake nanomaterial for oil displacement

A nano-material and oil displacement technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as difficult production fluid treatment, mechanical and chemical degradation, and concentration drop, and achieve excellent water solubility and easy storage , the effect of reducing viscosity

Active Publication Date: 2022-04-12
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many defects in the use of these two types of oil displacement agents. For surfactants, it is easy to be absorbed by rock formations, resulting in a decrease in concentration, and the strong emulsification effect makes it difficult to treat the produced fluid; for polymers, Its viscosity decreases significantly under high temperature and high salt conditions, and it undergoes mechanical and chemical degradation during injection and migration

Method used

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  • A kind of flake nanomaterial for oil displacement
  • A kind of flake nanomaterial for oil displacement
  • A kind of flake nanomaterial for oil displacement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) Preparation of hydrophobic compounds

[0067] 3g (0.018mol) azobisisobutyronitrile, 1g (0.013mol) mercaptoethylamine, 4.5g (0.052mol) monomer A, 20g (0.108mol) monomer B (R 1 for H, R 2 is n-octyl), 3.5g (0.006mol) monomer C (C-1, a is 3), 1.5g (0.012mol) monomer D (R 4 N-propyl), 180g of dimethylformamide, were added to a four-neck glass bottle equipped with a stirrer, a nitrogen pipe, a spherical condenser and a thermometer, and stirred until all the raw materials were dissolved, then nitrogen gas was introduced for 30 minutes, and the polymerization temperature Control at 65°C, polymerize for 5 hours, wash the product with ethanol / water mixed solution, and distill off volatile components under reduced pressure at 50°C to obtain a hydrophobic compound;

[0068] The structural confirmation data of this compound are as follows figure 1 shown.

[0069] It can be seen from the figure that the product has a correct structure and is the target product.

[0070] (2)...

Embodiment 2

[0075] As described in Example 1, the difference is that the amount of azobisisobutyronitrile added in step (1) is 4 g.

Embodiment 3

[0077] As described in Example 1, the difference is that the addition of monomer A in step (1) is 7 g.

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Abstract

The invention discloses a flake nano material for oil displacement. The present invention selects 3-glycidyl etheroxypropyl trimethoxysilane to modify hectorite nanoparticles to prepare sheet-shaped nanoparticles with epoxy groups on both sides, and then disperses the particles on the oil / water interface, using A hydrophobic compound with amino groups is used to modify one side of the particle hydrophobically, and sodium bisulfite is used to modify the other side of the particle hydrophilically to prepare an asymmetric sheet-shaped nanomaterial. After testing, the product has good dispersibility in simulated mineralized water; adding the product to the oil / water system can form an interfacial film with a certain strength, inhibit the fingering phenomenon during the displacement process, and improve the oil displacement effect; the product It has obvious viscosity-reducing effect on crude oil, and does not increase the difficulty of production fluid treatment.

Description

technical field [0001] The invention relates to a sheet-shaped nanometer material for oil displacement, which belongs to the technical field of oil field chemistry. Background technique [0002] Petroleum is one of the indispensable non-renewable resources in modern society, and its exploitation and utilization play an important role in the development of national economy. With the continuous development of oil extraction, most of the developed oil fields in our country have entered the high water cut period at present. Only through the tertiary oil recovery technology can the output be stabilized and the oil recovery rate increased. Chemical flooding is one of the main tertiary oil recovery technologies in my country. During the implementation of chemical flooding, the main chemical agents used are surfactants or polymers. However, there are still many defects in the use of these two types of oil displacement agents. For surfactants, it is easy to be absorbed by rock forma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/588C09K8/58C08F218/08C08F220/18C08F226/06C08F220/30
CPCC09K8/588C09K8/58C08F218/08C08F220/18C08F2/38C08F226/06C08F220/306
Inventor 张健王秀军张世仑康晓东王姗姗靖波
Owner CHINA NAT OFFSHORE OIL CORP
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