Various types of nanoparticles are utilized in EOR, each offering unique benefits:
1. Silica Nanoparticles: These are used to change the wettability of the reservoir rocks from oil-wet to water-wet, making it easier to displace the trapped oil. 2. Alumina Nanoparticles: These help in reducing the interfacial tension between oil and water, enhancing the oil's mobility. 3. Carbon Nanotubes: Known for their high surface area and conductivity, they are used to improve the thermal properties of the reservoir. 4. Magnetic Nanoparticles: These can be directed to specific locations in the reservoir using magnetic fields, making targeted EOR processes more efficient.
