Application of the EasySeis software for construction of seismic images on the Dniper-Donetsk depression

摘要

The easySeis software was developed at the Department of Geophysics of the Taras Shevchenko National University of Kyiv with the support of Geounit Company. The program complex is intended for the construction of 3-D seismic images of heterogeneous anisotropic geological medium by direct transformation of seismograms of common sources. Computational schemes are based on a number of original technologies for imaging of anisotropic medium proposed by the scientists of the Department of Geophysics. The definition of a velocity models for migration involves the use of checkshots or a vertical seismic profiling data. With the help of these data, a volumetric distribution of vertical velocities in a geological medium is formed. Such a distribution allows us to obtain reliable positions of the waves of the images and the corresponding structural elements of the geological medium in depth. This makes it possible to directly obtain reliable seismic images in a depth scale w hich is the main mode of program operation. If necessary the option of depth to time conversion is used via distribution of the vertical velocities. The volumetric distribution of the migration velocities for anisotropic heterogeneous geological medium is determined by calculating of two-dimensional or three-dimensional velocity spectra using surface seismic data. The results of seismic images construction for the Khrestishchensky area on the territory of the Dniper-Donetsk depression are considered.