1. College of Geosciences, China University of Petroleum-Beijing, Beijing 102249, China
2. CNPC Xibu Drilling Engineering Co., Ltd., Wushenqi 017300, China
3. Research Institute of Exploration and Development, CNPC Changqing Oil Field, Xi’an 710000, China
4. PetroChina Tarim Oilfield Company, Korla 841000, China
5. Exploration Research Institute, Anhui Provincial Bureau of Coal Geology, Hefei 230000, China
6. Shenzhen Branch of CNOOC Ltd., Shenzhen 518000, China