Aerial Photograph Of The Pyramid Wells Northwest Of Williston -- Vern Whitten Photography

I believe these are Statoil's Pyramid wells northwest of Williston. At the link go to photograph #12 of 31. If correct, the clues:

a) 4-well pad
b) round-about in the upper left (northwest) corner

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Video update of Williston, North Dakota, posted May 25, 2013:

Update, Williston, ND Would you ever guess this town is the center of the biggest oil play in the United States?