MOORING SYSTEM DESIGN FOR SPAR IN MAKASSAR STRAIT

• Main Author: Jaya Narendra (NIM : 15513060), Ikha
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22518
• Institution: Institut Teknologi Bandung

Oil and Gas Energy needs in Indonesia is increasing every year, it is necessary to explore and exploit oil and gas reserves at deep water in Indonesia as one way to meet those needs. One of the deep wells in Indonesia is the Kutai Basin, with a depth of >1000 m from still water level, required a floating structure to exploit the oil and gas from the area. One type of floating structure that can be used is Spar. <br /> <br /> <br /> Spar is a long vertical cylindrical floating structure, formed from several small cylinders connected into one large structure. In the offshore Spars will experience movements caused by environmental forces such as waves, winds and currents and are influenced by the size of the hull, mooring system and riser configuration. <br /> <br /> <br /> In this paper will be designed the size of the hole Spar diameter, length, draft and thickness of the hull then analyzed it balance and stability. There also be a mooring system with 12 catenary mooring line configurations moored to the seabed and will be subjected to a wave force from 12 directions according to DNV-OS E301 using two wave types regular and random wave (JONSWAP) will be modeled on a software. There will be analyzed for Spar transfer response arranged in API RP 2SK of 8% of water depth, and tension on mooring in accordance with API RP 2SK with 50% security actors from MBL for intact static analysis, 60% for intact dynamic analysis, 70% for static damage analysis, and 75% for dynamic damage analysis. With maximum tension recorded 48.3% of MBL and maximum displacement of 3.5% of water depth, where both parameters meet the standard API RP 2SK.