The Motion Response Analysis of Floating Jack-Up Rigs in the Operating Condition

Asri Sawiji

2018

Abstract

Natural gas reservoirs near the seabed (shallow gas) make drilling activities prone to blowout. Using a modified jack-up in a floating state will facilitate evacuation to avoid gas explosion. The floating jack-up is a misuse of the concept of jack-up structure design which must be operated in a fixed structural condition. This issue requires further investigation regarding the feasibility of the drilling operation process. Motion response of the floating structure is revealed in order to explore the feasibility of the operation of the jack-up. In this study, the motion response of the floating bodies will be compared by varying the jack-up leg length immersed in the water. The site reviewed in this analysis is in the Madura Strait, Indonesia. The floating jack-up was modeled and analysed in the MOSES offshore platform design and simulation software. Results show that the response amplitude operator of pitch motion has the most significant response in each variation. From motion validation with rules it can be concluded that the heave motion of this structure exceeded criteria limits for BOP and riser operations but is allowed for drilling activities. The obtained results show that a drilling process in the Madura Strait site using a floating jack-up could possibly be operated by lowering the legs until it reaches five meters above the seabed without running BOP and risers

Paper Citation

in Harvard Style

Sawiji A. (2018). The Motion Response Analysis of Floating Jack-Up Rigs in the Operating Condition. In Proceedings of the Built Environment, Science and Technology International Conference - Volume 1: BEST ICON, ISBN 978-989-758-414-5, pages 191-196. DOI: 10.5220/0008908100002481

in Bibtex Style

@conference{best icon18,
author={Asri Sawiji},
title={The Motion Response Analysis of Floating Jack-Up Rigs in the Operating Condition},
booktitle={Proceedings of the Built Environment, Science and Technology International Conference - Volume 1: BEST ICON,},
year={2018},
pages={191-196},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008908100002481},
isbn={978-989-758-414-5},
}

in EndNote Style

TY - CONF

JO - Proceedings of the Built Environment, Science and Technology International Conference - Volume 1: BEST ICON,
TI - The Motion Response Analysis of Floating Jack-Up Rigs in the Operating Condition
SN - 978-989-758-414-5
AU - Sawiji A.
PY - 2018
SP - 191
EP - 196
DO - 10.5220/0008908100002481