Method and a device for preparing nano-coated oil displacement agent by adopting micro-flow field reaction technology

Abstract

The invention belongs to the field of nano-coated oil displacement agent synthesis, and discloses a method and a device for preparing a nano-coated oil displacement agent by adopting a micro-flow field reaction technology. The preparation method comprises the following steps: (1) dissolving calcium chloride in ethanol, mixing with a coating material, and completely volatilizing ethanol to obtain an optimized coating material; (2) respectively dissolving an oil-displacing agent and the optimized coating material obtained in the step (1) with a solvent to obtain a first reaction solution and a second reaction solution, wherein a dispersing agent is used as a third reaction solution; (3) respectively and simultaneously introducing the first reaction liquid and the second reaction liquid intoa shearing device in a micro-channel reaction device for mixing; (4) while the step (3) is carried out, respectively and simultaneously introducing the effluent of the shearing device and the third reaction liquid into a micro-mixer for mixing, and introducing the mixed effluent into a microstructure reactor in a micro-channel reaction device for reaction to obtain an effluent, namely the nano-coated oil displacement agent. The particle size of the nano-coated oil displacement agent is 1-100 nm.

Description

technical field [0001] The invention belongs to the field of synthesis of nano-coated oil-displacing agent, in particular to a method and device for preparing nano-coated oil-displacing agent by adopting micro-flow field reaction technology. Background technique [0002] With the continuous development of oilfields, the problem of low residual oil saturation and dispersion of remaining oil near the wellbore caused by long-term water flooding will become an important problem encountered in oilfield development. However, polymers and surfactants, the main two types of oil displacement agents in chemical flooding, have the problem of ineffective consumption near the wellbore. The shear and adsorption at the initial stage of injection cause a large amount of oil displacement agents to be consumed in the invalid area with low crude oil saturation, which cannot be achieved. Effectively reaching the target contains oil displacement, which is less efficient. [0003] Nano-encapsula...

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Problems solved by technology

In terms of coating process, the coating of oilfield chemicals is mainly realized by some dispersion polymerization or interfacial polymerization. The process is complex and the particle size distribution of the product is wide.

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