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Parameters of near-surface rocks by combination of radioactive logging in section of key wells for seismic microzoningNormal access

Authors: V. Kulyk, M. Bondarenko and O. Dmytrenko
Event name: 11th International Conference on Monitoring of Geological Processes and Ecological Condition of the Environment
Session: Geophysics In Engineering Geology, Soil Science, Archaeology
Publication date: 19 March 2018
DOI: 10.3997/2214-4609.201800090
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 855.37Kb )
Price: € 20

Summary:
The construction of buildings for various purposes necessitates a detailed study of the features of the geological structure of near-surface rocks from the point of view seismic hazard. When preparing sites for the construction of important facilities, it is necessary to perform engineering-geophysical investigations of the near-surface rocks in section of key wells and to correlate the obtained results with the seismic data. The methodology for determining the set of parameters of near-surface sandshale rocks, which based on a combination of radioactive logging methods (gamma-ray logging, density logging, neutron logging), is developed. These parameters (density, shaliness, porosity, moisture content, groundwater level, etc.) are required for seismic microzoning of construction sites with the aim of agreement seismic and engineering-geological characteristics of the near-surface multilayer section. In general case, the petrophysical parameters of near-surface rocks can be determined by combining the measured quantities of the radioactive logging with using a set of a priori data. The features of obtaining these parameters in the zone of full water saturation and in the aeration zone are shown. Efficiency of the developed approaches is demonstrated by the example.


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