One of the priority areas for hydrocarbon production in Surgutneftegas PJSC is the complex productive layers of the Middle Jurassic complex, which have significant prospects for the discovery of new hydrocarbon deposits in Western Siberia. The rocks of the Tyumen formation are characterized by sharp lithological and facies variability, low filtration and capacitance properties and are not always controlled by structural factors. The zones of improved reservoirs are mainly confined to riverbed or delta formations. Despite the considerable amount of accumulated information, the models of the rocks of the Tyumen formation are still quite conditional and are created with large assumptions and simplifications. Detailed seismic exploration of MCDP 3D copes well enough with the identification of various fluvial-type objects, depending on the quality of the field and processed seismic material, but for successful drilling, it is sometimes not enough to determine only the boundaries of river facies. It is necessary to determine the facies feature of channel bodies, rank them according to their fishing properties: identify low-permeable areas, map the areas of improved filtration and capacitance properties, thereby increasing the efficiency of exploration.
The article considers the method of mapping highly permeable reservoirs in the continental sediments of the Tyumen formation, based on the dynamic and kinematic parameters of the wave field, taking into account the facies features of the formation development. The archive seismic data of MCDP 3D of different years were re-processed with an emphasis on the Tyumen section interval and the direct participation of interpreters at each stage of processing, which allowed to map new promising objects. According to the obtained volume, paleotectonic features of the work area, core material were studied, spectral decomposition was calculated, time sections, sedimentation and horizontal sections of the amplitudes cube and αPS were analyzed. The authors mapped objects of riverbed genesis, identified and substantiated desalinated areas with improved filtration and capacitance properties within the boundaries of ancient riverbeds.
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