Another Superb Look At Three Outstanding Oil Fields in the Bakken -- A Mike Filloon Perspective -- SeekingAlpha.com -- Bakken, North Dakota, USA

Link here.

The three fields: Alger, Sanish and Parshall.

The three fields are pretty much "owned" by BEXP, Whiting, and EOG, respectively.

Without going to the GIS map server, one can sort of envision the three fields as forming a "good luck" horseshoe with Stanley at the opening of the horseshoe. Not quite perfect, but close. (A "good luck" horseshoe looks like a "u"; hanging upside down, the "good luck" will run out of a horseshoe.) The Stanley oil field is south of Stanley and in the "cup" of the horseshoe; Stanley, the town, sits in Ross oil field.

At the link Mike Filloon has a nice discussion of the three fields noted above.