ABSTRACT

This paper describes the virtual simulation for the FPSO hookup and addresses their various applications for the mating operation between the FPSO and the SYMS in shallow water. The virtual simulation provides a virtual-reality environment, thus realistically replicating the hookup operation at the STC facility and identifying any deficiencies in key installation personnel, execution plan, or operation procedures. The key issues within this simulation program including the virtual-reality simulation of the offshore field, the numerical modeling of the marine spread and the met-ocean environment, as well as the performance of the key personnel when executing the installation work have been analyzed and measured.

INTRODUCTION

A VLCC class FPSO was successfully hooked up to a rotational Soft Yoke Mooring System (SYMS) at the Penglai 19-3 field in March 2009. The offshore site is located in the northern Chinese waters to the southeast of the Bohai Bay where the water depth is only 27.6 meters while the environment is relatively benign and multidirectional. A virtual simulation was performed at the Rotterdam STC Simulation Facility in June 2008 in order to provide a training and assessment program for the FPSO-SYMS mating operation. The scope of the virtual simulation covers various installation stages including a series of positioning trials, station keeping and temporary mooring to the pre-installed SYMS mooring tower, pendulum mating, and yoke ballasting to storm-safe, etc. The virtual simulation is designed to provide a virtual-reality environment, thus realistically replicating the mating operation at the STC facility and identifying any deficiencies in key installation personnel, communication skill, execution plan, and/or operation procedures. procedures.

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