[1] China Univ Geosci, Sch Energy Resources, Beijing 100083, Peoples R China
[2] China Univ Geosci, Key Lab Strategy Evaluat Shale Gas, Minist Land & Resources, Beijing 100083, Peoples R China
[3] China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing 102249, Peoples R China
[4] Henan Inst Geol Survey, Zhengzhou 450000, Henan, Peoples R China