Newly re-formed Rock Oil Holdings LLC has secured a private equity commitment of up to $250 million from Riverstone Holdings LLC subsidiaries to secure acreage in the Eagle Ford and Utica shales, and the Permian Basin. Company executives previously built a leasehold and associated production in the Eagle Ford, which were sold in separate transactions in 2012 and 2013 to Sabine Oil & Gas LLC and Sanchez Energy Corp. Abraxas Petroleum Corp. in 2010 had partnered in the play with predecessor Blue Stone Oil & Gas LLC (see Shale Daily, Aug. 30, 2010). Affiliate Riverstone Energy Ltd. also has committed $82 million to privately held Fieldwood Energy LLC, which it formed and which is the largest producer in the Outer Continental Shelf of the Gulf of Mexico (see Daily GPI, March 12).