In this video, Motley Fool energy analyst Joel South gives us two interesting plays for energy investors to keep their eye on. He talks about Denbury Resources (NYSE:DNR) and its $1 billion oil deal in the Williston Basin, and he also discusses who the low-cost natural gas producers are at the moment. With natural gas prices remaining painfully low, slashing costs is vital to maintaining profitable margins. He discusses the following graph to tell us which companies are staying in the black today.

Joel South and Taylor Muckerman have no position in any stocks mentioned. The Motley Fool recommends Ultra Petroleum, owns shares of Denbury Resources and Ultra Petroleum, and has options on Ultra Petroleum. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.