Annotation

The use of geophysical methods in solving engineering and geological problems makes it possible to save of time and money with a fairly high accuracy of results. The most widely used methods are electrical exploration, seismic exploration, radioactive logging. Using these methods the parameters of strength, porosity, fracture, water saturation and other physical and mechanical characteristics of rocks are determined. Theoretical and experimental studies make it possible to establish a relationship between these parameters and the physical properties of rocks determined during geophysical surveys.

The theoretical-empirical methodology of prediction of the elastic characteristics of rocks in cuts of wells is realized as a system of theoretical and empirical relations and the resulting functional. It is based on acoustic logging (АL) and the core research (CR) data. The theoretical relations between the elastic parameters of rocks taking into account the influence of pressure (depth), porosity, nonlinear elasticity according to the structural and dispersive features of rocks (stratification, microporosity) are derived. The empiric dependences between physical and collector properties of rocks with the use of parametric database for rock-collectors of particular territories and geological structures are built. The type of rock pores filler is predicted by a comparison of the results of velocities calculations according to the theoretical and empirical dependences and the factual data of АL, by filler density or compressibility of rock. For the cases of the acoustic logging data absence, the variants of the prediction methodology by using the data of gamma-logging, electric logging, and offset logging are developed. The adequate set of software tools is developed in the Fortran, C# and Excel environments.