Risk behind prosperity rnRisk threatens the safety of offshore oil-gas operation at all times.Mr.Zhou Bin,Deputy Director of the No.1 Department of National Administration of Work Safety(offshore exploration of oil and gas safety officejintroduced that rnoffshore oil operations are high-risk specialized operations with bad environment,limited space and hightechnical content.The density of installations,equipment and facilities is high,and there are various kinds of dangers and dangerous factors in the operating places where large amounts of inflammable and explosive materials are stored:The natural disasters like typhoon,tropical cyclone,storm surge,tsunami,earthquake and sea ice are also seriously threatening the safety of offshore oil operation.In particular,where the offshore oil operation is far away from land,it would be difficult for workers to escape and for rescue when accidents happen.