[1] Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
[2] Langfang Branch, PetroChina Research Institute of Petroleum Exploration and Development, Langfang 065007, China
[3] CNPC Key Laboratory of Unconventional Oil and Gas, Langfang 065007, China
[4] National Energy Shale Gas Research and Development (Experimental) Center, Langfang 065007, China