USING STATISTICAL METHODS FOR ANALYSIS OF THE RESULTS OF REGIONAL SEISMIC SURVEY AT EVALUATION OF OIL AND GAS CAPACITY PROSPECTS OF AREAS

Abstract

By materials of regional seismic survey of last times, there have been compiled summary structural maps of the basement and carbonate series superfaces (reflecting horizons I, II), and also the isopachous map of carbonate formation (Southern slope of the Voronezh anteclise, area of 35 000 km2). The trend-component for the basement superface has been determined, the map of isolines, characterizing amplitudes of II-order structural-tectonic elements of basement (with use of statistical methods) has been constructed. By results of analysis of the carbonate formation thicknesses jointly with tectonic elements of II order, there have been outlined contours of paleosags of shelf for the period of carbonate accumulation (including also these untouched by the inversion transformations). The belonging of known oil deposits and manifestations and also of reef limestones (being forecasted by data of seismic prospecting) to the areas of singled out paleosags has been established. The slopes of the outlined negative morphostructures are regarded as potential zones of oil and gas accumulation.