1. Iraqi Drilling Company, Basra 61004, Iraq e-mails: ;
2. Department of Chemical Engineering, University of Al-Qadisiyah, Al-Qadisiyah 58002, Iraq e-mail:
3. Department of Petroleum Engineering, Australian College of Kuwait, Safat 13015, Kuwait e-mail:
4. Department of Petroleum Engineering, Texas A&M International University, Laredo, TX 78041 e-mail: