New sour gas field exploitation is focused on but not limited to the Middle East given the many interesting activities taking place in North and South America, Russia, Central Asia and the Far East. Thus with so many international sour hydrocarbon projects there is a real need for operators to work closely with partners and service companies to ensure that project management, risks and costs are properly controlled for successful field development given the range of contaminants that need removing in order to sweeten the gas for industrial use.