1. Oilfield Development Division, PetroChina Changqing Oilfield Company, Xi’an 710018, China
2. Oil & Gas Technology Research Institute, PetroChina Changqing Oilfield Company, Xi’an 710018, China
3. National Engineering Laboratory of Low Permeability Oil and Gas Field Exploration and Development, Xi’an 710018, China
4. State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China