Riverstone Holdings LLC has committed to invest as much as $200 million in Kerogen Energy Holdings LLC, which is focused on US and Canada onshore unconventional oil and liquids exploration and production.

Kerogen is led by Chairman Alexander Kulpecz and President and Chief Executive Officer Murray Grigg, both of whom have technical expertise and management track records specific to shale oil reservoirs.

Having identified and completed technical evaluations of proprietary liquids-rich shale plays in the US and Canada, Kerogen executives said they acquired initial leaseholds and are prepared to expand leasehold interests and drill key projects.

Kerogen, founded in 2010 with the financial support of private investors, has offices in Houston and Calgary.