Abstract
The work contains data on tectonic structure, modern geodynamic activity and materials on the study of negative exogenous processes obtained as a result of the development of oil fields located on the urban land. The analysis of geodynamics of the Tersko-Sunzhen structure located in the central part of the Tersko-Caspian deflection was performed. The history of the formation of this tectonic zone is long and diverse and is determined by its fault-block tectonics. At the present stage, the territory is also defined as geodynamically active, consisting of blocks bounded by faults and fractures, which are characterized by intense movements of the earth’s surface. Stress unloading is expressed in the deformation of rock massif and in case of rapid (stepwise) unloading of tectonic stresses – through earthquakes. A special condition is that Starogroznenskoe and Oktyabrskoe oil fields are located on the territory of the city. To date, the cumulative production amounted to more than 150 million tons of oil. Long-term development of deposits led to equilibrium disturbances of the geological environment with significant change of formation conditions and accordingly to the development of hazardous geodynamic processes.
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