Submarine Pipeline Foundation Scour Risk Assessment&Countermeasures Study For Maoming Single Point Mooring System

Submarine pipeline is a very important facility for exploitation submarine resources as it is used for transportation of oil and gas from offshore platform and terminal to shore or islands, and it is widely applied in offshore project for advantages such as continuous and faster discharging, easily management, etc. people is paying more and more attentions on the research of submarine pipeline followed the increase offshore exploitation in the recent years.Sand and foundation surround Submarine pipeline is easily moved by the dynamic impaction of waves and current for the tough marine circumstances, thus it will bring on huge economic loses and serious environment pollution by the accidents such as pipeline broken because of the scour of the pipeline foundation. the scour of the seabed around pipeline is very complicated by the joint-function between waves, pipeline and the seabed for the effects of landform, terrene and current. By the side of Hydrodynamics, the scour subjected to pipeline involve the non-routine movement and separation of swirl repeatedly, and the surface of seabed is changing dynamically by the scour and thus making the different movement and separation of swirl between the surrounding with pipeline and the flat seabed without pipeline.It will be more complicated when we put effect to the movement of sand by the tremble of the pipeline which hanging in the air. For the intersection effects of all kind of factors during the happening of scour, it is usually to study the normal rules and principle of scour by some reasonable solutions simplified.The article is to analyze and evaluate the scour of pipeline foundation by studying the fact of foundation scour on submarine pipeline at Maoming SPM base on the theory of risk assessment, especially, more detailed research were carried out on the key issue__risk of naked pipeline, and conclusion assessment was made to show the real situation of scour at Maoming SPM, then carried out discussion on solutions to prevent the scour, at last, the article put forward some optimize ways base on the contradistinctive analysis.