Comprehensive studies of retrocore for the purpose to increase the effi ciency of geological exploration in poorly drilled areas (using the example of the Yelets-Petrikov deposits of the southern structural region of the Pripyat Trough)

   Introduction. One of the methods of forecasting oil-promising facilities is comprehensive studies of the core obtained during drilling. The emergence of new research methods, as well as the improvement of those already used, determines the need for further study of core material in order to obtain new data on the composition of rocks and their properties.

   Aim. A comprehensive analysis of the core taken from the wells of the old fund on the territory of the Southern structural region of the Pripyat Trough.

   Materials and methods. The work was performed based on the interpretation of data obtained as a result of a modern complex of works on primary sample preparation, lithological-sedimentological, mineralogical and pyrolytic studies of retrocore.

   Results. For the first time, the retrocore studies made it possible to form an conceptual lithological and sedimentological model of the formation of Upper Devonian (Yelets-Petrikov) deposits, determine the prospects of oil and gas potential for various types of reservoir rocks (terrigenous, carbonate, mixed), establish the boundaries of their distribution in the section and localize the main potentially promising objects for the search for hydrocarbons.

   Conclusion. Additional study and research of retrocore in a number of promising areas can provide important information about the true prospects of the oil-bearing capacity of the object. This is evidenced by the results obtained within the least studied Southern structural region of the Pripyat Trough. Despite the long-term storage of the core (for 30–50 years), fundamentally new data were obtained on the genesis of deposits, features of the mineral composition, hydrocarbon and generation potential. In addition, the study of the retrocore made it possible to form fundamentally new methodological approaches to the eff ective use of "retrodata" for the successful implementation of geological exploration tasks.

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