Design Of Underwater Oil Storage Tank

As the development of exploitation of off-shore oil, a large number of specialists and scholars have more and more focused on the applicable, integrate and simple offshore storage tank. There are many ways to store petroleum under water, displacement between oil and water is special due to economic and efficiency. However, it is inevitable that a small amount of crude oil will be discharged into marine and brings environmental pollution in the course of displacement.Because of the resource crisis and lots of countries'thirst for exploitation of offshore crude oil, techniques to store petroleum under water can simple system of oil development to some extend. The advantages and characters of storage tank under water decide the general trend of advancement.Therefore, this paper comes up an approach to design storage tank under water holding six-hundred thousands cubic meter petroleum and new interlayer for oil and water, which can avoid contact between oil and water, maintain merits to store by means of displacement between oil and water and is friendly to the marine environment. The paper analyses status of the storage tank and fluid structure interaction by the software of Gambit, ANSYS Workbench and ANSYS CFX. Moreover, it simulates the velocity, pressure distribution in flow field nearby tank, stress and stability of tank which locates in certain sea area of Bohai at the depth of twenty meters.After the simulation, tank underwater can meet stability requirement for environment under water and conform to the demands of exploration and storage mode under water. At the same time, it also testifies that the storage oil tank under water is feasible. All in all, the paper gives a brand new mode to explore offshore oil for our country.