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Pore Structure Characterization and the Controlling Factors of the Bakken Formation

Figure 1. Location of the Williston Basin and study area.

The Bakken Formation develops micropores, mesopores, and macropores. However, the Upper and Lower Bakken shale are dominated by micropores, while the Middle Bakken tight reservoir is dominated by mesopores. The total pore volume and specific surface area of the Middle Bakken are significantly higher than those of the Upper and