1. School of Petroleum EngineeringSouthwest Petroleum University Chengdu 610500 People's Republic of China
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University) Chengdu 610500 People's Republic of China
3. Shunan Gas Mine, PetroChina Southwest Oil & Gasfield Company Luzhou 646000 People's Republic of China
4. Experimental Detection Research Institute, Xinjiang Oilfield Branch Company, PetroChina Karamay Xinjiang 834000 People's Republic of China
5. Exploration and Development Research Institute of Tarim Oilfield Company, PetroChina Korla 841000 People's Republic of China