The high degree of knowledge of traditional search objects in the Volga-Ural region, as well as a significant reduction in the fund of structures, determine the need for additional study of the prospects for less studied areas. For most of the Udmurt Kama region, one of those are the intraformational Mozhginsky and Sarapulsky troughs of the Kama-Kinel system. The article discusses the paleogeographic features of the development of troughs, as well as organogenic massifs and structures in their depression and near-edge areas. A number of factors and conditions affecting the oil-bearing capacity of organogenic structures are presented. It is noted that the key oil-bearing criterion for the geological conditions of the side and axial trough zones is the presence of reliable fluid seal rocks. At the same time, the presence of a thick stratum of Lower Carboniferous clay sediments covering the bed of troughs in a cloak-like manner determines the productivity of bioherm bodies directly. Based on this, it was assumed that the optimal amplitude of buildings in the depression and side sections is no more than 200 and 100 meters, respectively. Under the conditions of filling the troughs with clayey sediments of increased thickness and the possible destruction of the tops of the buildings, a significant number of organogenic bodies of the Upper Fransian-Lower Famennian age is assumed. One of the possible exploratory signs of organogenic structures is associated with the direction of the local increase in the thickness of the underlying carbonate strata of the Rechitsa horizon. The necessity of orienting seismic techniques for identifying low-amplitude faults in terrigenous, as well as zones of disintegration (microfracturing) in the carbonate Devonian is noted. With regard to the features of the areal development of organogenic bodies, one should take into account their tendency to form groups of several buildings. It is concluded that it is advisable to continue the work with the aim of searching for promising reef objects in the study area.
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