Exploring Monoethylene Glycol-Based Magnetic Carbon Quantum Dots for Enhanced Rheology and Lubricity in Geothermal Drilling Operations | ||
| Journal of Basic and Environmental Sciences | ||
| Articles in Press, Accepted Manuscript, Available Online from 17 September 2025 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jbes.2025.417404.1025 | ||
| Authors | ||
| Anwaar O. Ali* 1; Amany A. Aboulrous2; Mahmoud F. Mubarak3; Mahmoud Ibrahim Abdou2; A M. Fadl2; Wagdy O I.El-Dougdoug4; Aly maboud5 | ||
| 1Production Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt Faculty of Science, Benha University, Benha, Egypt | ||
| 2Production Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt | ||
| 3Petroleum Application Department, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt | ||
| 4Faculty of Science, Benha University, Benha, Egypt | ||
| 5Benha University | ||
| Abstract | ||
| This study investigates the incorporation of monoethylene glycol-based magnetic carbon quantum dots (MEG-MCQDs) into geothermal drilling fluids to enhance their rheological properties, torque reduction, and frictional performance under high-pressure, high-temperature (HPHT) conditions. Various concentrations of MEG-MCQDs, ranging from 0.01% to 0.1%, were added to water based mud (WBM) to assess their impact on drilling fluid behavior. The MEG-MCQDs were thoroughly characterized using IR, BET analysis, Zeta potential, DLS, SEM, and TGA to confirm their stability, size, surface characteristics, and thermal properties. The results demonstrated significant improvements in key rheological properties, including an increase in plastic viscosity and yield point, essential for wellbore stability. The torque reduction was notably enhanced, with values reaching up to 52.4% at the highest concentration (0.1%), compared to the blank mud. Additionally, the friction coefficient decreased across all concentrations, with the highest reduction observed at 0.1% MEG-MCQD, showing a clear correlation between nanomaterial concentration and improved lubricity. The MEG-MCQDs nanocomposite also showed excellent thermal stability at 150°C, drastically reducing friction and torque as well as improving fluid loss control and overall drilling efficiency. Such findings open the door to the utilization of MEG-MCQDs for making geothermal drilling more efficient and sustainable. | ||
| Keywords | ||
| Monoethylene glycol magnetic carbon quantum dots (MEG-MCQDs); geothermal drilling fluids; rheological properties; torque reduction; friction coefficient | ||
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