摘要
1 Introduction Many high yield shale gas areas in the World are discovered carbon isotope reversals： Barnett, Fayetteville （Zumberge et al., 2012）, Marcellus （Tilley et al., 2013）, Haynesville （Ferwom et al., 2008）, Albany shale gas （Gao et al., 2014）, Utica shale gas （Xia et al., 1999; Xia et al., 2012; Xia et al., 2013）, the Foothills （Tilley et al., 2011）, Horn River （Tilley et al., 2013） and Ordos basin shale gas （Wang et al., 2015; Dai et al., 2005）.
1 Introduction Many high yield shale gas areas in the World are discovered carbon isotope reversals： Barnett, Fayetteville （Zumberge et al., 2012）, Marcellus （Tilley et al., 2013）, Haynesville （Ferwom et al., 2008）, Albany shale gas （Gao et al., 2014）, Utica shale gas （Xia et al., 1999; Xia et al., 2012; Xia et al., 2013）, the Foothills （Tilley et al., 2011）, Horn River （Tilley et al., 2013） and Ordos basin shale gas （Wang et al., 2015; Dai et al., 2005）.
