Move over, Permian Basin. Step aside, Bakken Shale. The Eagle Ford means business.

Crude oil production in the shale topped 300,000 barrels per day this summer, compared with just 358 bpd in 2008. Yes, oil production is up in southeast Texas, and it's time to get to know a few of the companies in this shale play that are making the most of it. In the following video, energy analyst Aimee Duffy gives investors the name of one shale stalwart, one up-and-comer, and one tangential play to start their research.