1. Petroleum Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak 32610, Malaysia
2. Research Centre for Shale Gas (RCSG), Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak 32610, Malaysia
3. Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak 32610, Malaysia
4. Department of Chemical and Engineering Sciences, Karlstad University, 651 88 Karlstad, Sweden
5. Centralized Analytical Laboratory, CAL/LMG, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak 32610, Malaysia