Reconstruction of thermal history of petromaternal togur deposits and assessment of density distribution of J15 and J16 layers resources

Abstract

The search of deposits of hydrocarbons in J16 and J15 layers of the Lower Jurassic oil-and-gas complex is current for expansion of resource base in the Nyurolsko-Koltogorsky oil-and-gas area. The purpose of the study is to identify the perspective regions of the Lower Jurassic oil-and-gas complex in the distribution zone of J16 and J15 layers. The research methods are the paleotemperature modeling based on solution of return and direct problems of geothermics under sedimentation conditions; mapping of paleocenters of oil intensive generation by geotemperature criterion. The thermal history of Togur deposits within the Nyurolskaya megadepression and structures of its frame has been reconstructed. The paleocenters of Togur oil intensive generation were revealed and sketched on the card. The authors mapped the distribution of relative density of resources for primary accumulated Togur oils for the Lower Jurassic oil and gas complex (layers J16 and J15). The authors carried out the reservoir zoning and suggested the primary search areas.

Keywords

• thermal history of the Togur deposits
• Lower Jurassic oil and gas complex
• density of resources of primary accumulated oils
• the Nyurolskaya megadepression