Integration of electromagnetic and seismic survey data at all stages of geological exploration: from the prospecting stage to the development of hydrocarbon fields

The article describes the importance of improving existing and developing new technologies for joint interpretation of geophysical methods aimed at prospecting and exploration of hydrocarbon fields. The potential of seismic prospecting and electromagnetic exploration by transient electromagnetic method in the near field zone (TEM) in solving oil and gas exploration problems in Western Siberia are considered. Regarding to seismic prospecting, the possibility of analyzing scattered waves for the prediction of fracture and cavernousness zones is considered in detail. Conducting TEM survey makes it possible to clarify the contours of hydrocarbon fields identified by seismic prospecting. Based on drilling data, petrophysical studies and reservoir capacitance characteristics (by seismic survey), it is possible to proceed to the saturation type prediction - to determine the water saturation value. It is shown that the results obtained by integrating seismic and electromagnetic surveys make it possible to significantly increase the detail and reliability of the survey area geological model at all stages of geological exploration: from prospecting to the development and exploitation stage of hydrocarbon fields.
Materials and methods
Within research, seismic and electromagnetic surveys data acquired during exploration in Western Siberia were used. Research methods: analysis of all available geological and geophysical data with the use of modern approaches, including mathematical modeling.
Results
The importance of improving existing and developing new technologies for joint interpretation of geophysical methods aimed at prospecting and exploration of hydrocarbon fields was proved. The effectiveness of seismic interpretation approaches (analysis of scattered waves) and transient electromagnetic method in the near field zone for solving oil and gas exploration problems is shown.
Conclusions
The results of integrated studies in Western and Eastern Siberia, obtained in recent years, allow recommend a set of geophysical methods consisting of electromagnetic and seismic exploration for oil and gas as optimal. It is the integration of seismic and non-seismic methods that makes it possible to increase the accuracy and reliability of geological models of the field. At the same time, studying the upper part of the section • obtaining a detailed geoelectric model • allows not only to use it to improve the quality of seismic data processing, map the poorly continuous structure of permafrost, but also to study the dangerous cryogenic processes appearance.