Nanofluid for fines migration reduction and enhanced oil recovery, method of preparation and uses

A nanofluid preparation method from a biogenic material, said method comprising steps of:

• (a) Treating the biogenic material with an acid to remove metal impurities thereby forming a treated biogenic material;
• (b) Heating the treated biogenic material at a first temperature between 150° C. and 500° C. to remove organic matter, thereby forming a first heat treated biogenic material;
• (c) Heating the first heat treated biogenic material at a second temperature above 600° C. to pyrolyze the first heat treated biogenic material, thereby forming a pyrolyzed biogenic material;
• (d) Grinding the pyrolyzed biogenic material to obtain nanoparticles of the pyrolyzed biogenic material;
• and
• (e) Mixing said nanoparticles of pyrolyzed biogenic material with an organic solvent to form a nanofluid, said organic solvent comprising a low polarity solvent, wherein the low polarity solvent is miscible with crude oil or is able to solubilize paraffin at a concentration greater than 5 g of the paraffin/100 mL of the low polarity solvent at 38° C.