Engineering Physics Annotation << Back THE EFFECT OF IMPERFECTION OF ANISOTROPIC FORMATION OPENING ON WELL PRODUCTIVITY DURING SPATIAL AXISYMMETRIC FILTRATION A.I. FILIPPOV, O.V. AKHMETOVA, M.R. GUBAYDULLIN The results of a computational experiment performed on the basis of solving the problem of spatial axisymmetric filtration in an imperfectly opened anisotropic reservoir using an implicit finite-difference scheme are presented. It is shown that changes in the flow rate, especially at short times, are observed when the perforation is located near the reservoir boundaries, and the displacement of the perforation interval to the reservoir boundary leads to a signifi cant decrease in accumulated production, the symmetry of the inflow is violated, and the specific flow rate decreases at the lower point of the perforation interval, and increases at the upper point. With an increase in the degree of opening, there is an increase in the absolute flow rate and a decrease in the range of its change caused by the displacement of the perforation interval from the border to the center, the difference in the values of the specific inflow between the center and the boundaries of the perforation interval also decreases. The regularities of flow rate changes in isotropic imperfectly opened layers, which are also manifested in anisotropic ones, are revealed. An increase in the anisotropy coefficient leads to a decrease in the flow rate over the entire range of well operation times, while the maximum value of the decline in the specific inflow is observed in the center. Keywords: filtration, imperfect opening, thermal conductivity equation, two-dimensional flow, finite difference method, pressure field, velocity field. DOI: 10.25791/infizik.1.2023.1306 Pp. 08-19.