Mapping the fractured zones of the carbonate-haloid rocks in Eastern Siberia by seismic and electromagnetic survey

Abstract

The article deals with the approaches to mapping the fractured zones in the lower Cambrian carbonate-haloid rocks within the Verkhnelensk neotectonic roof raise of the southeast periphery of the Siberian craton. The experimental data shows that broad–azimuth seismic prospecting (3D modification) makes it possible to map the fractured zones by a number of criteria including amplitude anomalies, no-coherence zones, spectral decomposition and scattered waves anomalies. In turn, near-field transient electromagnetic sounding (TEM) using the structural model based on the drilling and seismic prospecting data makes it possible to evaluate the reservoir’s properties (i.e. electrical resistivity) and saturation type. Integration of the geophysical methods of different physical backgrounds increases the validity of the fractured zones allocation for the carbonate-haloid rocks in Eastern Siberia.