Table 1: Economics of gas production from hydrates (modified from [19]).

Gas extraction methods
Thermal stimulationDepressurizationConventional gas production

Investment in millions of *254200166000157500
Annual cost in millions of 160000125500100000
Total production (million m3/year)1274.261557.431557.43
Production cost (/million m3)6356.64025.93213.6
Break-even wellhead price (/million m3)7945.85032.33972.9

*Calculated for currency rates at 2004 levels.