Oct 31 (Reuters) - Greenfields Petroleum Corp GNF.V
* Greenfields Petroleum Corp announces restructuring of senior secured debt
* Greenfields Petroleum Corp - has executed a twelfth amending agreement to its loan agreement dated November 25, 2013 with its senior lender
* Greenfields Petroleum Corp - pursuant to amendment, maturity date of loan agreement was extended from March 31, 2018 to January 15, 2020