Modeling the Formation of Hydrates in gas Wells in Their Thermal Interaction With Rocks

Consideration is given to a conjugate problem of heat exchange between the imperfect gas in a well and the environment (rocks). This problem is reduced to solution of differential equations describing nonisothermal gas fl ow in the well and the propagation of heat in the rocks. The dependence of the coeffi cient of heat exchange of the gas with the hydrate layer on the time-varying fl ow area is taken account of in aquasistationary mathematical model of formation (dissociation) of hydrates in the gas well. It is shown that in the conjugate formulation of the problem, the time of formation of hydrate plugs grows substantially in contrast to the case where the rock temperature is assumed to be constant.