En Ping 24–2 oil field is located in the Pearl River Mouth Basin in the South China Sea En Ping Sag, about 200 kilometers south of Hong Kong in water depth of about 86-96 m. The development of En Ping 24–2 oil field includes a newly built eight-legged drilling and production platform (DPP) with drilling rig, living quarters, sewage treatment facility, utility systems etc. and 2.2km apart, a newly build 150,000 DWT FPSO with power plant, oil and gas treatment facilities, utility system and living quarters etc. The FPSO is kept in station by a single point mooring system of internal turret type. The single point mooing system and riser system design for the FPSO become the key issues in the project because both systems have to face new challenges, such as shallow water depth, wild environments and high fluid pressure.

The paper presents the key design parameters of riser system, and addresses the evaluation of riser configurations to suit the Enping development. The evaluation focuses on the technical aspects in terms of system feasibility in the presence of harsh Enping environment. With respect to the suspended dynamic riser, several widely used configurations are evaluated and conduct the dynamic analysis in order to obtain riser responses such as effective tension, bend radius, contact clearance and seabed touch. Finally the key conclusions are reached.

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