an . ▁Natural ▁gas ▁is ▁extracted ▁from ▁the ▁Ost rac od ▁and ▁Gla u con ite ▁b eds ▁in ▁southern ▁Al berta , ▁and ▁light ▁oil ▁is ▁extracted ▁from ▁the ▁Ell ers lie ▁Member ▁in ▁central ▁and ▁southern ▁Al berta . ▁Multiple ▁oil ▁fields ▁and ▁gas ▁fields ▁tap ▁into ▁the ▁Man ville ▁Group . ▁▁ ▁Total ▁gas ▁res erves ▁amount ▁to ▁ 3 1 6 , 7 9 9 ▁x ▁ 1 0 6 m ³ ▁in ▁the ▁Lower ▁Mann ville ▁and ▁ 6 4 4 , 7 7 4 ▁x ▁ 1 0 6 m ³ ▁in ▁the ▁Upper ▁Mann ville . ▁Rec over able ▁oil ▁res erves ▁amount ▁to ▁ 1 0 5 . 6 4 ▁x ▁ 1 0 6 m ³ ▁in ▁the ▁Lower ▁Mann ville ▁and ▁ 1 9 9 . 2 0 ▁x ▁ 1 0 6 m ³ ▁in ▁the ▁Upper ▁Mann ville . ▁ ▁Distribution ▁The ▁Mann ville ▁Group ▁reaches ▁a ▁thick ness ▁of ▁ ▁in ▁its ▁type ▁local ity . ▁It ▁occurs ▁in ▁the ▁sub - sur face ▁in ▁central ▁Al berta , ▁extending ▁east - west ▁from ▁Ed mont on ▁to ▁Lloyd min ster ▁and ▁north - s outh ▁from ▁the ▁Deep ▁Bas in ▁to ▁the ▁United ▁States ▁border . ▁It ▁is ▁present ▁in ▁the ▁sub - sur face ▁in ▁west - central ▁and ▁southern ▁S ask atch ew an . ▁ ▁Rel ations hip ▁to ▁other ▁units ▁ ▁The ▁Mann ville ▁Group ▁is ▁dis com form ably ▁over lain ▁by ▁the ▁J