North Dakota's oil production averaged 660 thousand barrels per day (bbl/d) in June 2012, up 3% from the previous month and 71% over June 2011 volumes. Driving production gains is output from the Bakken formation in the Williston Basin, which averaged 594 thousand bbl/d in June 2012, an increase of 85% over the June 2011 average. The Bakken now accounts for 90% of North Dakota's total oil production.
Production gains in the Bakken formation are the result of accelerated development activity, primarily horizontal drilling combined with hydraulic fracturing. According to the North Dakota Department of Mineral Resources, there were a total of 4,141 producing wells in the North Dakota Bakken in June 2012, up 4% from May 2012 and up 68% from the number of producing wells in June 2011.
Increasing oil rig counts underscore the quickening pace of drilling in the region. Data from Baker Hughes show that in the Williston Basin, the average weekly count of actively drilling horizontal rigs totaled 209 in June 2012, essentially unchanged from the May 2012 average but 26% above the June 2011 average (see below). Most of these rigs are positioned in the Bakken.
The transportation system oil pipelines, truck deliveries, and rail to move crude oil out of the area is being affected by constraints due to growth in crude oil production from the Bakken formation. As a result of these bottlenecks, the difference between spot prices for Bakken crude oil and West Texas Intermediate (WTI) crude oil expanded through much of the first quarter of 2012. The spread has generally narrowed in recent weeks, however, reflecting the addition of rail transport facilities and increased refinery capacity in the Bakken area.
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