July 2009

Special Report: Liquefied Natural Gas Developments

Are floating LNG facilities viable options?

Here's how to evaluate technological and commercial issues of these units

Finn, A. J., Costain Oil, Gas & Process Ltd.

Technology developments in offshore liquefied natural gas (LNG) storage and transfer have made offshore LNG production commercially viable, even at plant capacities of 1 million tpy (Mtpy) to 2 Mtpy. Due to rising costs for onshore LNG facilities, floating LNG (FLNG) is cost competitive. Floating plants will use liquefaction processes based on turbo-expanders to generate the refrigeration. This technology has been used onshore for small-scale LNG production and offers important advantages including: • Inherent process safety • Simple design • Ease of operation • Smaller footprint • Low topsides weight. The overall project cost and schedule to first LNG

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