Dear Ammour Hadjer Ibtissam, nanofluids for example are interesting for EOR. Are you looking for something specific? Please check the following documents. My Regards

https://doi.org/10.1021/acs.energyfuels.9b03501

https://www.routledge.com/Chemical-Nanofluids-in-Enhanced-Oil-Recovery-Fundamentals-and-Applications/Saha-Tiwari-Uppaluri/p/book/9780367425241

https://doi.org/10.1039/C7RA05592G

https://www.researchgate.net/publication/251604798_Nanofluid_for_enhanced_oil_recovery

https://doi.org/10.1016/j.ptlrs.2021.03.003

Abdelkader BOUAZIZ Thanks dear for your answers. Best regards

Ammour Hadjer Ibtissam

In my opinion, the idea of ​​polymer flooding in tertiary oil recovery is an expensive technology. Water-soluble polymers and nanoparticles are expensive.

We have developed a technology for flooding with coke-chemical waste with a mixture of hydrotrope salts: toluene-, xylene-, benzenesulfonates.

When in contact with oil, due to the cooperative effect we have discovered, they behave like surfactants, i.e. reduce the interfacial tension between the aqueous solution and oil in the capillaries of the earth rock.

At a high temperature of the oil reservoir, arylsulfonates react to remove the sulfonate group and convert to hydrocarbons benzene, toluene, xylene. This dual effect leads to a significant reduction in the cost of tertiary oil production. You can read about the flooding method in our patent.

Patent COMPOSITION FOR TERTIARY OIL PRODUCTION

Dear Yuri Mirgorod

Thank you for your answer and your opinion.

My regards

Dear Ammour Hadjer Ibtissam

The concentration of nanoparticles if much can agglomerate easily in reservoir conditions, if less, it will be less effective. There is the need to strike a balance. Injection salinity is vital too, because as salinity reduces, reservoir rocks become more hydrophlic.

doi: 10.11648/j.ajasr.20200603.11