сейсморозвідка

Object. Development of a method for predicting a two-three dimensional velocity model of a medium by using a shear wave. Complexly structured geological medium is studied on the basis of geophysical and geological data using an artificial neural network. Method.  It provides the construction and use of medium models according to geophysical well logging data and other terrestrial geophysical methods. In contrast to existing methods, the proposed method also uses additional data on the medium.

There are four types of seismic waves: primary waves , secondary waves , wave Rayleigh and Love waves. The first two types are called depth waves, because these waves penetrate into the depths of the earth. Rayleigh waves and Love waves called surface waves. They can to propagate on the surface. Given the characteristics of propagation of these waves can be concluded that even at low energies excitation source, Rayleigh waves can propagate at a much greater distance than depth waves, so it would be advisable to use them in security systems.

The results of seismic wave field modeling on the cross-section model of the crust (for Drobyshivske gas-condensate field example) were presented. Complicated cut of the crust, resulting geophysical study, represented as a reservoir model. When modeling, seismic wave field features of two-dimensional cross section were taken into account: longitudinal, transverse and exchange waves received on seismograms of longitudinal and transverse vibrations as a result of default distribution of velocities of longitudinal, transverse waves and the density in half-space medium.

Summarizes the results of preliminary studies to ascertain the nature of earthquakes and seismic safety in the provision of technologically-risk areas Krivoy Rog iron ore and coal basins Pavlograd. The possibilities of highly sensitive seismic stations UK15, established in Dnepropetrovsk (n. Mirnij), check local and remote Kryvyi Rih and Pavlogradskij earthquakes.

Energy-researched analysis of the wave field (ERA-WF) on the example of 3D seismic data Drobyshivska area is investigated. Results of the study are compared with the results of analysis of the wave field, made by the frequency Fourier method, Prony, Gilbert, wavelet functions, and the results of the parametric interpretation of geophysical parameters derived using a software system Petrel.

In the paper the implementation of energy wave field analysis approach for developed informational model of the geological medium is considered. The solutions of seismic inverse problem are presented, which involves geophysical parameters obtaining of geological medium with the use of field seismic data. In order to obtain geological and geophysical environmental parameters the number of wave field transformations are being carried out, conventionally divided into primary and final part (interpretation).

The paper presents the techniques for processing of seismic prospecting data – for inversion of time seismic sections to depth ones. This makes it possible to extrapolate defined by wells’ geophysical investigations one-dimensional models of medium’s physical properties into the borehole environment. Correcting of the model taking into account the thermodynamic state of the medium and calculation of various physical properties of medium within the classical and non-classical theories of deformation as well as calculation of synthetic seismograms is provided.

An effective algorithm is suggested for obtaining the approximate solution of direct dynamic problem of seismic exploration, using a theory of kinematic and dynamic propagators. The developed algorithm has been included as a subsystems in automated system of quantitative complex interpretation of geologic and geophysical data GCIS. The modeling experiment has shown the adequacy and efficiency of the solution as was compared to traditional grid method of solving the direct dynamic problems.

The definition of „shale gas” as a natural gas from shale and its general characteristics are considered. Based on analysis of the experience in the United States, the dependence of shale petrophysical properties on its potential gas-saturation was determined. Modeling of seismic effects, appearing after hydraulic fracturing, was performed. The possibility of using the geophysical methods in the search, exploration and production of natural gas from shale is substantiated, in the territory of Ukraine as well.

Purpose. The purpose of the article is the interpretation of the gravity data with using the seismic data for revealing of zones of decompression with high porosity in the Visean carbonate of the Srebnenska depression (within Dnepro-Donetsk Basin). These zones may be associated with the development of organic Limestone massives, which are promising for hydrocarbon deposits. Methodology.