1. School of Petroleum Engineering Chongqing University of Science and Technology Chongqing China
2. State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum (Beijing) Beijing China
3. College of Geosciences China University of Petroleum (Beijing) Beijing China
4. Energy & Geoscience Institute University of Utah Salt Lake City Utah
5. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, Faculty of Earth Resources China University of Geosciences Wuhan China
6. Drilling Technology Department, CNPC Engineering Technology R&D Co., Ltd. Beijing China
7. Coal Mining Research Branch China Coal Research Institute Beijing China
8. Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China