1. College of Energy Resources, Chengdu University of Technology, Chengdu, People’s Republic of China
2. Schlumberger Chengdu base, Chengdu, People’s Republic of China
3. Sinopec Zhongyuan Oilfield Company, Puyang, People’s Republic of China
4. Sinopec Northwest Oilfield Company, Urumqi, People’s Republic of China