1. A computerized system for automated identification of surfaces for building a geologic-hydrodynamic model of an oil-and-gas deposit based on seismic data, comprising: one or more processors; an input/output module (I/O); a non-transitory computer-readable medium containing a program code, which, when executed, will induce the one or more processors to execute the following modules: a data identification module for identifying model parameters including grid pitch; a surface-continuation module which is linked to the data identification module and comprises the following modules connected in series: a module for determination of surfaces, whose input is the input of the surface-continuation module; a domain determination module for determining a domain where each determined surface is defined; a grid node adding module for adding new grid node; a module for setting parameters of seismic attribute volumes; a module for setting coordinates of the newly added node; a module for determining coordinates of an adjacent node; and a module for setting a surface depth parameter in the adjacent node, whose exit is the exit of the surface-continuation module; a surface-sorting module which is linked with the surface-continuation module and comprising the following modules connected in series: a module of ordering depths of surfaces, whose input is the input of the surface-sorting module, and a module for setting the depths of surfaces, whose exit is the exit of the surface-sorting module; a clarification module which is linked with the surface-sorting module and which comprising the following modules connected in series: a module for determining surfaces to be processed, whose input is the input of the clarification module; a module for determining functionals and gradients of the surfaces to be processed; a module for determining a displacement distance; a module for determining an attainment of a minimal value of each determined functional; a displacement module to perform displacement; a memory module; an exclusion module for temporary exclusion from processing any surface for which the corresponding functional has been decreased; and a module for determining processed surfaces; a module for determining a current grid pitch; a module for iteration and determining of an attained size; wherein the module for determining processed surfaces having one exit connected with the input of the surface-sorting module and another exit connected with the input of the module for determining the current grid pitch, which has one exit connected with the input of the module for determining surfaces to be processed and another exit connected with the input of the module for iteration and determining of the attained size, the module for iteration and determination of the attained size being connected with the data identification module and being provided with a possibility of enabling iterative implementation of the functions of the data identification module, the surface-continuation module, the surface-sorting module, the clarification module, the module of determining the current grid pitch, and the module for iteration and determination of the attained size until a model with the parameters identified by the data identification module is obtained.