1. Sinopec Northwest Oilfield Company, Urumqi 830011, China
2. Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Qingdao 266580, China
3. Tianjin Branch of CNOOC Ltd., Tianjing 300459, China
4. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China