In his latest research on shale oil French oil geologist Jean Laherrere from ASPO France

http://aspofrance.viabloga.com/texts/documents estimates a Bakken shale oil peak in 2014.
 
 
He uses a Hubbert linearization to calculate a total of 2,500 mb to be produced
 
 
In global terms, a total cumulative of 2.5 Gb is just around 10% of annual crude production and 1.3% of daily production.
 
 
Well productivity in Bakken is stagnant at around 130 b/d for a couple of years now.
 
 
There has been a peak in the number of drilling rigs. A shift of the rigs curve by 2 years suggests a production peak in 2014.
Jean’s research is in line with that published by David Hughes in November 2013: