Ice Plug Formation During Gas Hydrates Dissociation in Strata

P569 ICE PLUG FORMATION DURING GAS HYDRATES DISSOCIATION IN STRATA GEORGE G. TSYPKIN Institute for Problems in Mechanics RAS Av. Vernadskogo 101 117420 Moscow Russia Summary 1 The new mathematical model of gas hydrate dissociation in strata with a positive initial temperature is investigated. It is shown that there exist four various regimes of hydrate decomposition. It is found that in high-permeable strata the ice saturation behind the dissociation front can reach large value. This phenomenon leads to a reduction in gas production. Introduction The growing demand for understanding and treating the process of gas extraction from hydrate saturated reservoirs