Updated from 12:24 p.m. EST

Over the next 25 years, the demand for energy and energy-related products will likely increase by as much as 50%, to 160 million barrels of oil per year.

As the world's largest company by revenue, at $404.5 billion for the fiscal year of 2007, Exxon Mobil ( XOM - Get Report) could be poised for upside appreciation if management starts buying up beaten-down oil and natural gas assets in the near future.

Exxon, which has not done a major deal in the oil and natural gas space in years, should use the company's $40 billion in cash and AAA rating to float a multi-billion-dollar bond offering to help finance accretive buys in the space.

Here are some companies Exxon should take a look at.

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Exxon Mobil closed Tuesday down 1.76%, at $78.20 per share.

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