There are 32 arctic offshore oil/gas projects already in operation or having confirmed development plan. Seven offshore engineering patterns have been applied, including "gravity based structure (GBS) + shipping pipeline", "subsea production system + onshore terminal", "artificial island + shipping pipeline", "jacket platform +shipping pipeline + onshore terminal", "floating platform + subsea system", "FPSO + subsea system" and "offshore oil produced from land". Gravity based structure is the most widely used production platform, followed by FPSO/FSO, subsea production system, floating platforms and artificial islands. Arctic offshore wells have been mainly drilled from anti-ice floating drilling platform, ice-resistant fixed drilling platform and artificial island. In future, arctic petroleum exploration & production will move to deeper water area; natural gas development will play more important role. In arctic offshore E&P area Tremendous facilities and technologies will be developed and applied, including anti-ice floating concrete Spar, fully enclosed production platform, "subsea factory", round semi-submersible drilling platform, seafloor drilling rig, GBS LNG facility, free hanging solid ballast semi (FHSB Semi) platform and so on. Advantages & disadvantages, application conditions of main arctic offshore engineering patterns, facilities & technologies are described, which shall be helpful for arctic project investment opportunity study, screening and evaluation.

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