Problem of non-isothermal filtration of a hydrocarbon mixture in bottom-hole formation zone in view of multicomponent diffusion
problem of non-isothermal ltration of a hydrocarbon mixture within a bottom-hole formation zone in view of multicomponent diffusion is solved in three-dimensional non-equilibrium interpretation. Authors have сalculated the diffusion ows of gas and lique ed components of a hydrocarbon mixture ltering in the bottom- hole zone of a well. They also have studied effect of multicomponent diffusion on the yield and productivity of an imperfect well. Correct formulation of a uid withdrawal problem corresponds to examination of interaction between more than two wells, so a problem with unique well will be judged as a model one, and its solution will be aimed at determination of the effect of multicomponent diffusion during ltration of a hydrocarbon mixture on the ltration characteristics within the small neighborhood of a bottom-hole formation zone.A three-component methane-propane-octane mixture (correspondent mole fractions: 0,9268; 0,0632; 0,01) [8, 9] is taken in the capacity of a model ltering mixture. It has low condensate factor and is common for Chayanda, Kovykta, and Bovanenkovo hydrocarbon elds. At well bottom, the calculated yields of gas and liquid phases, and an entire mixture differ depending on either consideration, or neglect of diffusion transfer of components masses. In particular, under given thermobaric conditions the consideration of such additional mass transfer increases a value of well productivity factor by at most 3 %. At that, on a scale of a real hydrocarbon eld the possibility to take into account the additional diffusion mass in ow in the multicomponent mixtures provides a chance to precise amounts of component recovery using math modelling, and hence to estimate reserves of this eld more accurately.