Implementation of structural-thermo-atmo-geological-geochemical studies for mapping prospective oil and gas reservoir areas in the Obolonska astrobleme

Abstract

The article presents the materials and results of complex near-surface structural-thermo-atmospheric-geological-geochemical studies (STAGGD), performed in order to assess the oil and gas potential prospects of impact structures known in Ukraine, in particular the Obolonska impact structure, given as an example. The applied principles of the STAGGD system technology using a complex of tectonic, morphostructural, lithological and stratigraphic, geophysical, hydrological, thermometric and atmogeochemical methods are outlined. The system of criteria (structural-tectonic, hydrocarbon, temperature, emanation, gas) and features of formation of near-surface and near-surface thermo-atmo-geochemical background of oil and gas fields are characterized. A description of the methods and tools and software developed by the authors for the express forecasting of minerals is given. The possibility of increasing the efficiency of geological prospecting for oil and gas as a result of the introduction of scientifically based theoretical ideas and new technologies for the study of non-traditional oil and gas-bearing objects – impact structures is considered. A brief review of scientific research and production works on the assessment of prospects for oil and gas bearing capacity of impact structures of the crystalline foundation both abroad and on the territory of Ukraine is given. On the basis of repeated analysis of the available data, a conclusion was made about the diffusion nature of direct search gas-geochemical anomalies over oil and gas fields. This made it possible to effectively use a complex of the STAGGD in the assessment of non-traditional objects, in particular impact structures. As an example, the cartographic results of studying the Obolonska impact structure using this method are given. An analysis of aerospace surveys of the Silyan impact structure was also performed and some recommendations were offered for further study of its oil and gas potential. Carrying out purposeful complex geological and geophysical works in the shortest possible time will contribute to solving the problems of energy security of the state.

Keywords

• аstrobleme
• hydrogen
• oil and gas potential
• impact structure