4Maurer W C. Advanced drilling technology [ M ]. Tulsa : The Petroleum Publishing Company, 1980 : 19-347.
5Sakmar S L. Shale gas development in North America: an o verview of the regulatory and environmental challenges facing the industry[R]. SPE 144279,2011.
6Aaron Padilla. Social responsibility ~ management systems : el evating performance for shale gas development[R]. SPE 156728,2012.
7Faraj B,Williams H, Addison G, et al. Gas potential of select ed shale formations in the Western Canadian Sedimentary Ba- sin[J]. Canadian Resources,2004,10(1) :21-25.
8Dong Z, Holditch S A, MeVay D A, et al. Global unconven tional gas resource assessments[R]. SPE 148365,2011.
9Gupta J K, Zielonka M G, Albert R A, et al. Integrated meth odology for optimizing development of unconventional gas re sources[R]. SPE 152224,2012.
