Geoinformatika 2012; 4(44) : 28-35

AVO-ANALYSIS OF SEISMIC DATA OF CRYSTALLINE BASEMENT DECONSOLIDATION ZONE (RESULTS OF MATHEMATICAL MODELING)

S.A. Vyzhva, G.T. Prodaivoda, P.M. Kuzmenko, O.O. Kozionova

The article reviews an actual problem of informative possibility of AVO-analysis based on synthetic model with close approximation to the real geological media. Application state-of-the-art methods of mathematical modeling of effective elastic and acoustic properties of multi-cracked porous-cavernous geological media expand the possibility of AVO-analysis to explore deconsolidated zones in crystalline basement. The data obtained by mathematical modeling of effective elastic and acoustic properties of granite with different structure of fractures demonstrate the possibility of AVO-analysis for exploration deconsolidated gas saturated and oil-saturated zones of basement. But a significant impact of crack-porous structure, cavernous space on the reflection coefficient requires special foundation. An opportunity assessment of spatial orientation of cracks and elastic anisotropy parameters is possible when taking into account the influence of anisotropy on the reflection coefficient.

Keywords: AVO-analysis, seismic data, deconsolidated zones, crystalline basement.