AS

There are various methods of oil shale thermal processing with the purpose to generate primary energy product – so-called shale gas – however, methods that do not require the extraction of rock to the surface are of special interest [1]. In these methods, shale gas is extracted directly from the stratum as it is heating up, in one way or another. The aim of this work is to build a model of thermal decomposition of shale strata when they are heated by electromagnetic field. The model takes into account the phenomenon of thermal conductivity, interphase heat and mass transfer, thermal effect of chemical reactions and gas flow in the pores. Due to significant anisotropy of properties, shale stratum can be represented in the form of a solid porous plane, which has evenly distributed heat sources formed by electrodes, the distance between which L is much larger than their radii R0. The geometry of the computational domain is shown in Fig. 1. Obviously, the challenge is to find the temperature distribution only in the destination area including one source with coordinates (L/2, L/2). Under the influence of an alternating electric field oil shale is heated by heat associated with its polarization, as well as by Joule heat caused by the conduction current. When heated, solid phase reagent AS that forms the shale skeleton, decomposes into a solid product BS and gas BG coming into the pores. At the initial time some quantity of the gas GR, which is identical in composition to the BG, is already contained in the pores. In turn, when heated, the gas GR transforms into the gas Gp. Thus, the chemical reactions of the shale decomposition can be represented by the following conventional pattern