Stebelska H. Geological and productional exploration and development preconditions of high viscosity oil and natural bitumen deposits of the Dnieper-Donets basin

A research object is deposits of high viscosity oils and natural bitumens and genetically related to them oil and gas deposits. The purpose of work is a scientific-methodical ground of conformities to law of distribution of deposits of high viscosity oils and natural bitumens in different geological terms, development of criteria of their searches and secret service and measures. Research methods - lithologic-and-facies, structural-tectonic, comparative analysis, mathematical statistics. Geological conditions of high viscosity oil and natural bitumen deposits occurrence in Dnieper-Donets basin are analyzed in dissertation. Their distribution regularities are established. Main oil-bitumen bearing zones predicting criteria where formed. Ten perspective areas where selected according to them. Authorial scheme of Dnieper-Donets basin oil-bitumen bearing zone location was created and rated according to the degree of geological certainty and technical and economical development viability. Criteria of high viscosity oil and natural bitumen deposits reserves assessment parameters are suggested. Generalized productional classification of oils was established. The main selection criteria for high viscosity oil and natural bitumen deposits development methods are determined with factors, which affect their effectiveness.