The tectonic development history of the Baykit anteclise Kamovsky arch and adjacent area

Background. A detailed structural framework and an understanding of the tectonic development history of the area are of particular importance in predicting the filtration-capacity properties of secondary reservoirs. The structural framework is based on seismic data. Even high-quality seismic data have limited information value, especially in complex seismic and geologic conditions. In such a situation, together with the classical structural seismic data interpretation, one can use the technique of structural-kinematic modeling [5], which makes it possible to predict the structure of geological objects within low-information areas on the basis of kinematic algorithms of structure formation. Such complex objects include the Kamovsky Arch of the Baykit Hight province, within which fields have been discovered whose reservoirs are represented by highly transformed fractured Riphean carbonates. The construction of the structural framework of the Baykit Hight province using the structural-kinematic modeling methodology is the first stage of building a model filtration-capacity property of the Riphean reservoirs.
Objective. To determine the key stages of tectonic development and associated paragenesis of faults and fractures within the Kamovsky Arch and adjacent territories.
Materials and methods. Data on the regional structure and development of the Siberian Platform, the Baikit Hight, the Kamovsky Arch and adjacent territories, 2D/3D seismic data, drilling data were used as source materials. As the basis of the work, a complex method of structural and tectonic analysis was used, including analysis of the thicknesses of stratigraphic units, mineralogical composition of sedimentary and magmatic formations, modeling of kinematics of formation, development and reactivation of faults (structural and kinematic modeling technique).
Results. As a result of the application of the method of structural-tectonic analysis 4 major tectonic stages were identified within the territory of the Kamovsky Arch. The structural-kinematic model of the territory development has been created and the main fault systems have been identified.
Conclusion. As a result of combining the standard seismic data interpretation with the structuralkinematic modeling technique, a reliable structural-tectonic model of the Baykit Hight province with detailed characterization of the main stages of the territory development was obtained. The results obtained are the basis for modeling the stress-strain state of the rock massif and determining the main directions of vectors of tectonic transport at different stages of development of structures controlling the distribution of filtration-capacity property Riphean reservoirs.

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