Offshore Platform is a comprehensive structure that has no permanent access to the shore or dry land for oil and gas purposes. Generally, fixed and floating platform are two options which could be selected after considering particular requirements criteria. In order to install its structure permanently to the sea-bad, fixed offshore platform use some piles as foundation. Approximately 500 meter is the maximum of sea level that is still acceptable in using this type of platform for oil and gas facilities.
Structural considerations have a lot of analyses to be performed in specific consequences. In general, there are two main attentions that will be used to assess structure for withstanding particular load in different analyses such as in-service and pre-service analysis. In-service analysis can be defined as condition while structural platform is standing for its lifetime. On the other hand, construction and installation condition are involved as pre-service condition.
According to the common practices, those analyses could be broke down below.
• Inplace Analysis
• Seismic/Earthquake Analysis
• Fatigue Analysis
• Collision Impact Analysis
• Lifting Analysis including Rigging Aids Design
• Transportation Analysis including Seafastening Design
• Load-out Analysis
• Launch Analysis
• Up-ending Analysis
• Floating Analysis
• Jacket on Bottom Stability Analysis
• Pile Drive Ability Analysis
• Pile Stick-up Analysis