METHOD OF SEARCHING FOR HYDROCARBON DEPOSITS IN NON-CONVENTIONAL RESERVOIR ROCKS OF BAZHENOV GROUP Russian patent published in 2016 - IPC G01V11/00 

FIELD: geology.

SUBSTANCE: invention relates to geological-geophysical investigations and can be used to detect hydrocarbon material in non-conventional reservoir rocks of Bazhenov group of the sedimentary cover, as well as for evaluation of oil and gas deposits area contained in non-conventional reservoir rocks. Core: gravity, magnetic and seismic survey is performed within the selected area, as well as drilling, geophysical exploration of wells and geological-geochemical analysis of the drill sample. As per the results of gravitational and magnetic survey areas of negative gravimetric and magnetic anomalies associated with acidic extrusive domes are identified. According to seismic exploration data main reflecting horizons, regional and zonal seals of the sedimentary cover and its base are interpreted. Seepage areas of the regional seal of the radome group are identified on the basis of analysis of seismic time sections, its propagation within the area is simulated. As per the results of wells geophysical researches and drill samples data lithologic-facieses and paleogeographic investigations of deposits defining the sediment basin are performed, areas of propagation of a granular reservoir rock are determined, which are the unloading areas for fluids. As per the results of geological-geochemical analysis of the drill sample temperature anomalies and zones of secondary converted rocks are detected, dependencies are determined between productivity of wells and areas of distribution of the temperature anomalies. On the basis of generalized data a predicted integral loop of propagation of deposits of non-conventional reservoir rocks is built.

EFFECT: technical result is higher efficiency of localisation of promising areas and prediction of new perspective sections for hydrocarbon stock of non-conventional reservoir rocks of Bazhenov group, assessment of the reserves area; reducing drilling volumes.

1 cl, 2 dwg