Comprehensive Analysis of Geological-geophysical Data and Development Parameters to Justify System of Bedded Deposits in Allochthon and Autochthon of Vuktyl Oil and Gas Condensate Field

Comprehensive analysis of injected ‘dry’ gas distribution and well production, composed correlation schemes of productive Artinian-Lower Carboniferous sediments, reservoir pressure distribution over sediments of various age revealed that the well-known massive deposit of Vuktyl field is characterized as a system of bedded deposits, apparently, with its own gas-water contact. This model allows the most efficient control and management of processes in the productive section when using the injection of ‘dry’ gas in allochthonous part of the field. According to drilling and 2D, 3D seismic survey in the north of Vuktyl field an autochthonous fold with amplitude of up to 125 m is established in carbonate deposits of Lower Permian-Lower Carboniferous, to which bedded deposits may be confined, as evidenced by the abundant oil flow and oil and gas shows in drilled wells. Total resources of the autochthonous bedded deposits could reach tens of billions of cubic meters.