A new adaptation of a proven flow simulator is aiding blowout contingency planning. Most important wells require a blowout contingency plan. Part of that plan includes relief well intervention. Tbe flow simulator distinguisbes between workable and difficult intervention scbemes. It suggests any needed modifications in original well design. And it makes crisis management quicker, cbeaper, and more effective. Tbis paper describes the power of using this simulator for both surface and relief well bydraulic kill planning.