Experimental investigation into the applicability of depressurization to dissociate methane hydrate in an unconsolidated sedimentary sample

초록

The gas production behavior of a methane hydrate-bearing sedimentary sample was experimentally investigated during the dissociation process by depressurization. A unique apparatus of 10 meter-scale was developed to expand the in-situ applicability of depressurization. An unconsolidated sedimentary sample was prepared using artificial particles that have a similar grain-size distribution of sandy layers to that in real hydrate fields. In the experiments, pressure, temperature, and gas production volume were measured. The results showed that the gas production behavior was dominated by the fluid flow, which is unlike previous experimental results performed using centimeter-scale samples. Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE).

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