...+ We are updating our recovery analysis for U.S.-based oil and gas exploration and production company Northern Oil and Gas Inc. based on its year-end 2015 PV-10, which uses Standard & Poor's recovery price assumptions. + We are revising the recovery rating on the company's unsecured debt to '6' from '5'. As a result, we are also lowering the issue-level rating on the senior unsecured debt to '###' from '###+' and removing it from CreditWatch with negative implications. + The corporate credit rating remains 'B-', with a negative outlook. BOSTON (Standard & Poor's) April 8, 2016--Standard & Poor's Ratings Services today revised its recovery rating on Wayzata, Minn.-based Northern Oil and Gas Inc.'s senior unsecured debt to '6' from '5'. The '6' recovery rating indicates our expectation of negligible (0% to 10%) recovery in the event of a payment default. As a result, we also lowered the issue-level rating on the company's senior unsecured debt to '###' from '###+' and removed it from CreditWatch,...