Abstract
The results of clarifying the deep Severodvinsk fault zone location are presented and its structure in the upper part of the section using shallow seismic survey by shear-wave reflection method and extensional reflected waves method using a system of multiple overlaps (CDP method) is considered. The site under study is located in the Kholmogorsky tectonic knot area (north of the EEP) and represents a zone of tectonic dislocation intersection. In the upper part of the section, a fracture zone was found accompanying this deep fault, in with water infiltration, discharge of reservoir gas fluids; karst was detected in carbonate rocks. This zone can be attributed to seismogenic, which implies a repetition of weak seismicity manifestation on the Arkhangelsk horst complicated by tectonic faults.
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