1. China University of Petroleum (Beijing), State Key Laboratory of Petroleum Resources and Prospecting, Beijing, China; China University of Petroleum (Beijing), College of Geosciences, Beijing, China; and Sinopec Jiangsu Oilfield Company, Research Institute of Petroleum Exploration and Development, Yangzhou, China.
2. China University of Petroleum (Beijing), State Key Laboratory of Petroleum Resources and Prospecting, Beijing, China and China University of Petroleum (Beijing), College of Geosciences, Beijing, China. (corresponding author)
3. Sinopec Jiangsu Oilfield Company, Research Institute of Petroleum Exploration and Development, Yangzhou, China.