1. Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University (Ministry of Education & Hubei Province), Wuhan, Hubei 430100, PR China
2. Exploration and Development Research Institute, Shengli Oilfield Company, Dongying 257000, PR China
3. Hubei Key Laboratory of Petroleum Geochemistry and Environment, Yangtze University, Wuhan 430100, PR China