The gas-hydrate studies led by Central Geological Survey,Taiwan,since 2004,have shown the highly likely existence of a huge amount of gas hydrates,offshore SW Taiwan.The gas in-place is estimated to be around 2.7 trillion cubic meters.The National Science Council of Taiwan therefore expects to conduct exploratory drilling and logging campaign both in the Kaoping accretionary wedge and the northern rifted-margin of the South China Sea,off SW Taiwan,to better understand gas hydrate systems and evaluating gas-hydrate resource potential.