The Bakken formation has emerged as one of the most important sources of oil in North America. Thanks to advances in horizontal directional drilling and hydraulic fracturing, the Bakken, which occupies some 200,000 square miles under the Williston Basin joining parts of Montana, North Dakota, Saskatchewan and Manitoba, produces over 10 percent of U.S. oil. North Dakota is now the second most productive oil state, behind only Texas.
Saskatchewan Research Council
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