With oil prices rising and offshore production looking unattractive, we turn our attention to the great frozen north where water is sparse and oil sand abounds.

FORBES: Go Offshore With Canadian Oil Sands

The world's deepest significant sub-sea oil production is currently in the Gulf of Mexico, at water depths of 1, 200 metres.

ECONOMIST: Angolan oil: Drilling down | The

The startup also plans to use the money to develop products for processing wastewater and delivering purified water for industrial operations such as oil and gas or beverage production, Green said.

FORBES: NanoH2O Lines up $60.5M For Water Purification Tech

We are very much interested in responsible but effective oil exploration and recovery, and that is why we have approved 37 shallow-water permits and why overall, as I noted, domestic oil production is at its -- last year was at its highest level since 2003.

WHITEHOUSE: Press Briefing

He has opened more public land and water for safe and responsible energy production, not just gas and oil but also wind and solar, creating thousands of new jobs and nearly doubling our use of renewable energy in this country.

WHITEHOUSE: President Obama Nominates Sally Jewell as Secretary of the Interior | The White House

Deep-water drilling was supposed to hold off the effects of a decline in world oil production that began in 2005 and is forecast to continue unabated through the rest of this century, just as several billion Chinese and Indians go on an energy consumption spree.

FORBES: Investing For A Peak-Oil Future