1. Key Laboratory of Theory and Technology of Petroleum Exploration and Development in Hubei Province, China University of Geosciences, Wuhan, Hubei 430074, People’s Republic of China
2. Department of Petroleum Chemistry, American University of Nigeria, Private Mail
Box 2250, Yola, Adamawa 640231, Nigeria
3. Mbeya University of Science and Technology, Post Office Box 131, Mbeya, Tanzania
4. Arusha Technical College, Post Office Box 296, Arusha, Tanzania
5. Department of Petroleum and Energy Engineering, School of Mines and Petroleum Engineering, The University of Dodoma, Post Office Box 259, Dodoma, Tanzania
6. Mineral Resources Institute, School of Mines and Geosciences, University of Dar es Salaam, Post Office
Box 35052, Dar es Salaam, Tanzania