O'Brien Energy Resources, a privately owned oil and natural gas exploration company, completed the acquisition of production assets of oil exploration companies Keith F. Walker Oil & Gas and Oolite Energy. Financial terms were not disclosed. "The production fund model provides the company with a great balance for our exploration activity, and also allows us the opportunity to apply our expertise to maximize the production of these added wells and potentially continue to explore the associated mineral leaseholds," Mark Eddinger, O'Brien Energy Resources Executive Vice President.