In 2011, a senior manager at
Continental Resources Inc. (CRI) declared that the "Bakken play in the Williston basin could become the world’s largest discovery in the last 30-40 years", as ultimate recovery from the overall play is now estimated at 24 billion bbls.
[17] (Note : the recent discoveries off the coast of Brazil should be greater, with proven reserves of 30 billion,
[18] and a potential for 50 to 80.
[19]) This considerable increase has been made possible by the combined use of
horizontal drilling,
fracking, and a large number of wells drilled. While these technologies have been consistently in use since the 1980s, Bakken is the place where they are being most heavily used : 150 active rigs in the play and a rate of 1,800 added wells per year. CRI developed a technology allowing its rigs to move a few hundred yards on hydraulic "feet", increasing the rate of well completion.