Over 600 tcf of offshore gas reserves are estimated to reside in approximately 600 stranded gas fields worldwide. Producers have been seeking a flexible means to extend their transport reach and unlock these reserves. The commercial availability of Compressed Natural Gas (CNG) ships combined with Floating LNG allows the rethinking of offshore development. Fields previously considered stranded, can now be monetised by using CNG ships for regional distribution and LNG for global markets. Subsea pipelines are the accepted method of delivering offshore gas to local markets. In cases where the distance is too long, the seabed too difficult, or the water depth too deep, a subsea pipeline can quickly become uneconomic. Pipeline economics can be further exacerbated by a relatively short field life – since they cannot be relocated. Floating CNG overcomes these difficulties and effectively reaches many local and regional markets that cannot be supplied by pipeline. Marine CNG floats above water depth and seabed concerns and is economic for shipping distances up to 2000 km. CNG ships, unlike pipelines, can be relocated to new fields as the original field declines. This allows a series of smaller offshore fields to be developed in sequence, effectively increasing the total project life and minimize stranded assets. With the advent of the American Bureau of Shipping (ABS) approved Coselle® CNG ship, CNG shipping has become a viable and flexible option for the transportation of natural gas over water. The patented Coselle technology uses very large pressure vessels made with inexpensive, small diameter steel pipe. One of the advantages of conventional construction is that CNG ships can be produced in shipyards with known costs and schedules. Given that the majority of project CAPEX is in the fleet, the risk for significant cost and schedule overruns on a marine CNG project is thus very limited. This innovative technology significantly reduces the cost of CNG shipping while offering exceptional safety and simplicity. Offshore monetization with CNG and FLNG by David Stenning and Lyndon Ward Sea NG Corporation Figure 1: C112 Coselle CNG ship structure reveal