The Influence of Topside on Installation Design in Ultra-shallow Sea Water

摘要

As platforms become larger and heavier, the weight of topside alsoincreases. Due to the limit of water depth, the large crane cannot operatein ultra-shallow water areas. Based on the new platform of Jinzhou 9-3adjusted project in the Bohai Sea, the authors analyzed the large topsideinstallation mode, choose two four-legs jacket for the platform support,use special deck supporting unit (DSU) and optimize the operation draft,and reviewed the effect of topside float-over installation design onoperations in ultra-shallow water areas. The report will bring forwardnew ideas for the marginal oilfield development, and summarize lessonslearnt from the platform design, construction and installation in ultrashallowsea water.