A kind of amphiphilic montmorillonite and its preparation method and application

Abstract

The present application discloses an amphiphilic montmorillonite and a preparation method and application thereof. The method comprises: adding a hydrophobic monomer and a surfactant to an aqueous dispersion containing montmorillonite and a hydrophilic monomer to obtain an off-white mixed solution ; Add an initiator to the off-white mixed solution to obtain a reaction solution, and carry out a radical polymerization reaction to the reaction solution to obtain amphiphilic montmorillonite. The method obtains the amphiphilic montmorillonite through the free radical micelle method, avoids the use of organic solvents, not only reduces the cost, but also avoids steps such as demulsification, oil-water separation, etc. The method reduces the production difficulty, improves the product yield, and the product has Amphiphilic performance, stable performance and controllable particle size.

Description

technical field [0001] The application relates to an amphiphilic montmorillonite and a preparation method and application thereof, belonging to the technical field of oil displacement. Background technique [0002] In the past two years, my country has continuously become the world's largest crude oil importer. According to the 2018 Development Report of the Oil and Gas Industry at Home and Abroad, China's foreign dependence on crude oil is as high as 69.8%. "National Oil and Gas Resources Dynamic Evaluation 2010": China's petroleum geological resources are 103.7 billion tons, and low-permeability and low-grade heavy oil resources account for about 2 / 3 of the total oil resources. The recovery rate is only 12-14%. [0003] During the development of water flooding, the hydration, scaling and (clay) expansion of the reservoir rock will result in small pores and low permeability in the reservoir, resulting in the failure of water injection and oil recovery, which seriously aff...

AI Technical Summary

Problems solved by technology

This method uses a physical method to compound various substances together, which is cumbersome for industrial production, and when it is actually used in oil fields, it is prone to chromatographic separation effects, resulting in poor results

[0008] The preparation of nano-displacement agents generally involves grafting nanoparticles with monomers with lipophilic groups, usually requiring multiple steps, complex processes and harsh conditions

The prepared product needs to break the emulsion and separate the oil-water mixture. There are problems such as low product yield, poor separation effect, unstable performance, uncontrollable particle size, high production cost, and difficult production.

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