Motion Response Analysis of Non-Ship Shaped FPSO for Deepwater

The offshore energy resources of shallow and intermediate deepwater fields have been exploited well in the past years. Due to the demand for oil and gas resources to survive humankind, deep and ultra-deepwater production systems have increased significantly. A Non-Ship shaped FPSO's are invented to subjugate the limitations. It brings the platform under control, defeats an accidental load like Snow& Ice loads, and is used for the open sea and arctic environments. Primarily Non-ship shaped FPSO has been adopted for shallow water depths only. The investigation of their response in deep water depth is required to implement the platform in deepwater production fields. In the present study, the numerical model of non-ship shaped FPSO with turret arrangement has been modeled using commercial software. This paper aims to conduct the motion response study of non-ship shaped FPSO in India's Krishna-Godavari (KG) basin with varying water depths of 135m, 500m, and 1000m. The numerical analysis of motion response of the non-ship shaped FPSO in the surge, heave, and pitch mode under the regular wave of operation condition (H
s
= 9.77 m and T
p
= 10.30 s) and survival condition (H
s
= 20.7 m and T
p
= 14 s) has been done using Ansys Aqwa. The 135m water depth study results have been validated with the experimental results of Vijayalakshmi and Panneerselvam [1]. The comparison of the results of three different water depths has been presented in the paper.