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| Content Provider | frontiers |
|---|---|
| Author | Lai, Nanjun Zhu, Qingru Qiao, Dongyu Chen, Ke Wang, Dongdong Tang, Lei Chen, Gang |
| Description | 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. |
| Abstract | High mobility of CO2 relative to crude oil and formation water lead to low sweep efficiency or serious gas channeling in ultra-low permeability reservoirs. The primary objective of this work was to investigate responsive nanoparticles to apply for mobility control to enhanced oil recovery. Responsive nanoparticles were developed based on the 3-aminopropyltrimethoxysilane (KH540) modified nano-silica (SiO2) via Eschweiler-Clark reaction. The prove to concept for responsive nanoparticles was investigated by FT-IR, 1H-NMR, TEM, DLS, CO2/N2 response, wettability, plugging performance and core flooding experiments. Results indicated that responsive nanoparticles exhibited a good response to control nanoparticles dispersity due to electrostatic interaction. Subsequently, responsive nanoparticles shown fascinating plugging capacity gas channeling with a plugging efficiency of 93.3% to control CO2 mobility, and more than 26% of original oil was recovered. Moreover, the proposed responsive nanoparticles could reverse oil-wet surfaces to water-wet state relying on surface adsorption to assist the oil displacement. The results of this work indicated that responsive nanoparticles might have potential application for enhanced oil recovery during CO2 flooding in ultra-low permeability reservoirs. |
| ISSN | 22962646 |
| DOI | 10.3389/fchem.2020.00393 |
| Volume Number | 8 |
| Journal | Frontiers in Chemistry |
| Language | English |
| Publisher Date | 2020-05-21 |
| Access Restriction | Open |
| Subject Keyword | Pluging CO2 flooding Responsive nano-SiO2 Enhanced Oil Recovery Mobility control |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |
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