Degradation of frozen hydrate-containing saline rocks under thermal influence from below and above

A mathematical model has been formulated for the degradation of saline permafrost rocks (MMP) containing ice, accumulations of metastable self-conserved gas hydrates and free gas due to climate warming and the influence of heat flow from below. In the simplest case, an analytical expression of the laws of reservoir degradation is obtained from the model from above due to an increase in temperature at the upper boundary, and from below due to the inclusion of an increased heat flow. It is shown that degradation from below occurs mainly according to a linear law in time, while degradation from above occurs more slowly, i.e. only according to the root law. The proposed model and the obtained simplest formulas can be used to study the degradation fronts of a frozen formation not only due to ice melting, but also earlier and faster decomposition fronts of metastable gas hydrates without ice melting. The corresponding thermodynamic points are close. As an application of the model, a specific numerical variant is considered and the curves of the degradation fronts are illustrated.