Tang, Shizhen (Shandong Key Laboratory of Ocean Engineering, Ocean University of China) | Huang, Weiping (Shandong Key Laboratory of Ocean Engineering, Ocean University of China) | Deng, Yue (Shandong Key Laboratory of Ocean Engineering, Ocean University of China) | Liu, Jianjun (Shandong Key Laboratory of Ocean Engineering, Ocean University of China)
This paper presents a new type of Spar platform named S-Spar. Its midsection is a cylinder with the same diameter as the centre well. And the centre well and midsection is designed as an integrated structure. Heave plates are attached appropriately along the connection section. With the unique midsection, S-Spar is suitable for operating at the special oceanic environment and ultra-deep water depth in South China Sea. The paper will discuss both structural design and hydrodynamic analysis. Detail motion analysis results show that the platform offers excellent motion characteristics, and optimizing to carry large payloads in ultra-deep water. Finally, the effect of potential and viscous damping in different region has been analyzed.
As the offshore oil exploitation activities expending to deep water and even ultra-deep water, many new types of floating structures suitable for this depth are being developed concomitantly. Compared with other floating structures, Spar platform has excellent stability, benign motion behavior and adaptation to wide range of water depth. Besides, the rigid risers and dry tree system can be used in Spar platforms. Due to so many advantages depicted above, Spar platform is then regarded as an attractive design solution for regions of deep water. Since the first generation of Classic Spar has come to use, the Spar platform has been evolved into the second generation of Truss Spar and the latest Cell Spar (Finn, Maher and Gupta, 2003). With the rapid development of deep-water oil industry, many new technologies and innovative Spar concepts are frequently being proposed to adapt to new operation conditions and ultra-deep water depth. Nowadays, the South China Sea has focused the attention due to the rich storage of oil and natural gas. So the exploitation of the South China Sea is a hot and attractive task and has broad prospects.