1. Safety, Environment and Technology Supervision Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu, China;
2. Sichuan Key Laboratory of Evaluation and Exploitation of Shale Gas, Chengdu, China;
3. Postdoctoral Research Station, Southwest Jiaotong University, Chengdu, China;
4. Sichuan Changning Natural Gas Development Co., Ltd, Chengdu, China