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


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