In the following video, Motley Fool energy analysts Joel South and Taylor Muckerman take a look at the Williston Basin and discuss the Three Forks formation, located beneath the Bakken, that's attracting a lot of attention at the moment. Joel tells us about some of the exploratory wells that companies like EOG Resources (EOG 0.38%), and Continental Resources (CLR) are drilling and how those wells are performing. They also tells investors what the cost/benefit ratio looks like for companies that are drilling wells at increased depths to tap this rock layer.