The playbook focuses on the Duvernay, Alberta Bakken/Exshaw, Montney and Cardium-- leading resource plays that are revolutionizing Western Canada's oil business. Companies employing horizontal drilling and multi-stage fracturing technology are delivering fresh volumes of rich natural gas and light oils to market. The most prolific plays are the Montney, a rich-gas powerhouse, and the Cardium, a prodigious light-oil producer. Shale plays that show considerable promise, but that are still in early days of development, are the Duvernay and Alberta Bakken/Exshaw.