Abstract
As part of theMallik 2002 GasHydrate Production Research Well Program, the JAPEX/JNOC/GSC et al. Mallik 5L-38 gas hydrate production research well was the focus of an advanced, downhole geophysical-logging program. Gas volumes that may be attributed to a gas hydrate accumulation within a given geological setting are dependent on a number of reservoir parameters. Two of these parameters, sediment porosity and gas hydrate saturation, have been assessed with data obtained from downhole well-logging devices deployed in Mallik 5L-38 well. Downhole logs confirm the occurrence of a relatively thick gas-hydrate-bearing stratigraphic section in the depth interval fromapproximately 891 to 1109m in the Mallik 5L-38 well. Porosities of the gas-hydrate-bearing reservoir rocks, derived from density well logs, range from 25 to 40%. Gas hydrate saturations within the gas-hydrate-bearing units of the Mallik 5L-38 well, calculated from the downhole resistivity-log data, were very high, with peak gas hydrate saturations exceeding 90%.
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