1. Petroleum Engineering Department, China University of Geosciences, Ministry of Education, Wuhan, Hubei 430074, People’s Republic of China
2. Department of Applied Sciences and Social Studies, Arusha Technical College, Post Office
Box 296, Arusha, Tanzania
3. Laboratory Center of Exploration and Development Research Institute, Daqing Oilfield, Daqing, Heilongjiang 163712, People’s Republic of China
4. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, People’s Republic of China
5. Department of Chemistry, College of Natural and Applied Sciences, University of Dar es Salaam, Post Office Box 35061, Dar es Salaam, Tanzania