Taewoong Ahn

Experimental Study on Two-phase Flow in Artificial Hydrate-bearing Sediments

ABSTRACT It is important to investigate gas-water multiphase flow in methane hydrate-bearing sediment. In this work, we measured relative permeability of gas and water in artificial methane hydrate bearing sediment by the unsteady state method, and determined the effects of hydrate saturation on relative permeability curves. The results show that the relative permeability shifted left with increasing hydrate saturation.

Effect of Hot-brine Temperature on Hydrate Dissociation Behavior in Methane Hydrate-bearing Sediments

ABSTRACT The dissociation behavior in methane hydrate-bearing sediments was experimentally analyzed by changing temperature of hot-brine ranged from 16.3 to 42.0 Celsius. The experimental apparatus was designed to demonstrate an idealized one-dimensional dissociation phenomenon. The movement of dissociation front was directly measured from the temperature distribution during dissociation. The dissociation front advanced faster with increasing injection temperature. The normalized speed of dissociation front could imply the probable zone to be dissociated by injecting unit pore volume of hot-brine in hydrate reservoir, and was linearly correlated with the temperature-driving force.