Evaluation of regional exploration stage of nonsulfurous hydrocarbon raw material on Astrakhan arch
The authors suggest that the main prospects of further increase of mineral raw base and preparing commercial oil and gas reserves are associated with poorly studied deep occurred Devonian deposits. Gazprom has elaborated a complex program of raw base development for Astrakhan region up to 2010. As from 1997 here parametric drilling for Devonian complex in left- and right-bank parts of Astrakhan arch characterized by geological structure peculiarities took place. In left-bank part of the arch in the centre of extensive uplift the well Devonskaya-2 was located, and on western plunge of subsalt deposits - parametric well Pravoberezhnaya-1. During period of parametric wells construction within Astrakhan arch the detailed geophysical studies were carried out resulted in understanding of necessity to continue geological exploration even at exploration stage. Among first priority trends are systematic analysis and data summarization for further direction of activity, volumes and technology of geological exploration. By results obtained, the correlation of key seismic horizons, analysis of rock-and-fluid properties and spatial parameters of promising traps, evaluation of HC-resources will be done allowing to construct geological model of subsalt part of Astrakhan arch and prepare grounds for optimum selection of new prospecting wells site.