CO2 /N2 -Responsive Nanoparticles for Enhanced Oil Recovery During CO2 Flooding

Frontiers in Chemistry
Nanjun LaiGang Chen

Abstract

During CO2 flooding, serious gas channeling occurs in ultra-low permeability reservoirs due to the high mobility of CO2. The chief end of this work was to research the application of responsive nanoparticles for mobility control to enhance oil recovery. Responsive nanoparticles were developed based on the modification of nano-silica (SiO2) by 3-aminopropyltrimethoxysilane (KH540) via the Eschweiler-Clark reaction. The proof of concept for responsive nanoparticles was investigated by FT-IR, 1H-NMR, TEM, DLS, CO2/N2 response, wettability, plugging performance, and core flooding experiments. The results indicated that responsive nanoparticles exhibited a good response to control nanoparticle dispersity due to electrostatic interaction. Subsequently, responsive nanoparticles showed a better plugging capacity of 93.3% to control CO2 mobility, and more than 26% of the original oil was recovered. Moreover, the proposed responsive nanoparticles could revert oil-wet surfaces to water-wet, depending on surface adsorption to remove the oil from the surface of the rocks. The results of this work indicated that responsive nanoparticles might have potential applications for improved oil recovery in ultra-low permeability reservoirs.

References

May 9, 2003·Nature·Darsh T Wasan, Alex D Nikolov
Mar 15, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Kirti KondipartyDarsh Wasan
Aug 2, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Jianzhong JiangBernard P Binks
Nov 5, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Yongmin ZhangXuefeng Liu
Sep 27, 2018·Journal of Agricultural and Food Chemistry·Xinyan YanXiaoping Rao

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Methods Mentioned

BETA
amidation
dynamic light scattering

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