This website is a very comprehensive source of information on the Canadian oil and natural gas industries. Provides industry information, statistical handbook, prices and data, energy supply, innovation, environmental and climate issues and much more.
"The U.S. Energy Information Administration is committed to enhancing the value of its free and open data by making it available through an Application Programming Interface (API) and open data tools to better serve our customers. The data in the API is also available in bulk file, in Excel via the add-in, and via widgets that embed interactive data vizualizations of EIA data on any website."
Published annually, this is an extensive collection of statistics on the world energy picture - find the data you need on oil, natural gas, coal, nuclear energy, hydroelectricity, and primary energy. Data is provided in graph and tabular formats.