Research On The Safe Distance Between Passing Ship And Offshore Platform

With the increasing scarcity of land resources,the world has gradually increased the development and utilization of marine resources.Ocean,especially in the offshore waters is rich in oil and gas resources,so the offshore oil and gas industry has developed rapidly.The offshore drilling platform is the main equipment for oil and gas exploration.The increase of offshore drilling platform makes the contradiction between oilfield exploitation and safe navigation of ships increasing apparently.In order to ensure the safe navigation and the normal exploitation of oil and gas fields in a limited space,it is necessary to quantify the distance between ships and coastal drilling platforms.In this thesis,the relevant theoretical calculation model is summarized through the study of relevant documents at home and abroad,including thermal radiation hazard model for platform leakage fire disaster,drift model for ship out of control,ship veering braking model and ship astern stopping model.By selecting appropriate ship and test conditions,the recommended distance under different models is obtained.Then based on statistical correlation theory and use the ship AIS data,statistics the distance between the passing ship and platform according to sailing area,ship tonnage,speed and traffic density in the vicinity of the platform.The influence of the navigation area,the ship type and the tonnage on the distance is analyzed and obtain the regression equation of distance value.Finally,the model calculation results and data statistics were compared,and analyzed the rules from the point of the theoretical basis of the model and the characteristics of the ship type.In this thesis,motion model and data statistics are used to provide the appropriate recommended distance value for the safe operation of the ship and the safe operation of the platform,hoping to provide reference for the revision of relevant normsand standards.