Engineering Physics Annotation << Back THE NONSTATIONARY PRESSURE FIELD IN A LAYERED INHOMOGENEOUS MEDIUM UPON INJECTION OF RADIOACTIVE SOLUTIONS О.V. AKHMETOVA, А.I. FILIPPOV, А.А. KOVALSKIY, M.R. GUBAYDULLIN On the basis of a modifi cation of the «on the average» exact asymptotic method, analytical formulas for pressure fi elds are found at a constant rate of injection of radioactive solutions into an inhomogeneous anisotropic layer in the zero asymptotic approximation under the assumption of an axially symmetric flow. The space-time dependences of the deviation of the pressure field from the equilibrium are presented. Based on the analytical expressions that determine the approximate value of pressure fields in formations with vertical heterogeneity, calculations of the space-time dependences of the pressure perturbation are performed. Key words: pressure fi eld, fi ltration, asymptotic method, heterogeneous orthotropic layer. Contacts: E-mail: S2_88@mail.ru, E-mail: isayakhov92@mail.ru Pp. 03-14.