1. National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields, Xi’an, China
2. School of Earth Sciences and Engineering, Xi’an Shiyou University, Xi’an, China
3. Exploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi’an, China
4. No. 2 Gas Production Plant, PetroChina Changqing Oilfield Company, Xi’an, China