REGIMES OF DISSOCIATION OF GAS HYDRATES
COEXISTING WITH A GAS IN NATURAL STRATA 
G. G. Tsypkin

UDC 532.546:536.421

A mathematical model of decomposition of gas hydrates 
that coexist with a gas in natural strata is proposed; the model takes 
into account the mobility of the liquid phase. Conditions at the unknown 
boundary of dissociation are derived. In the self-similar approximation, 
the solution is represented in the form of probability integrals. 
The obtained system of transcendental equations at the moving boundary 
has been investigated numerically in a wide range of parameters. It 
is shown that different regimes of dissociation in collectors with 
a positive initial temperature exist; these regimes correspond to 
the decomposition of a hydrate into gas and water and gas and ice 
and have both a sharp phase-transition front and are accompanied by 
the formation of an extended region of dissociation. On the plane 
of the main parameters of the process, the critical diagram is constructed 
and the existence domains of the solution of each form are singled 
out.

Institute of Problems of Mechanics, Russian Academy of 
Sciences, Moscow, Russia; email: tsypkin@ipmnet.ru. Translated from 
Inzhenerno-Fizicheskii Zhurnal, Vol. 74, No. 5, pp. 24-28, September-October, 2001. 
Original article submitted January 3, 2001.


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