Riverstone Holdings LLC announced that it has committed to invest up to $200 million in Kerogen Energy Holdings LLC. With offices in Houston and Calgary, Alberta, Kerogen is focused on onshore unconventional oil and liquids exploration and production in the U.S. and Canada.

Kerogen is led by chairman Alexander Kulpecz and president and CEO Murray Grigg, both of whom have exceptional technical expertise and management track records specific to the exploration and development of hydrocarbons from shale oil reservoirs.  

Since its formation in late 2010, the company has identified and completed the technical evaluations of proprietary liquids-rich shale plays in both the U.S. and Canada, has acquired initial leaseholds and is now positioned to expand its leasehold interests and drill key projects.