Geological Characteristics of Deep Drill Hole
Investigation and Evaluation of the Geological Characteristics of Deep Drill Hole in Russia for the Study of Geological Disposal of Radioactive Waste.
Tech Area / Field
- ENV-WDS/Waste Disposal/Environment
8 Project completed
Senior Project Manager
GERS, Russia, Murmansk reg., Zapolyarny
- VNIPI Promtechnology, Russia, Moscow\nVNIITF, Russia, Chelyabinsk reg., Snezhinsk
- Forschungzentrum für Umweltund Gesundbeit / Institut für Tieflsgertung, Germany, Braunschweig\nRadioactive Waste Management Center, Japan, Tokyo\nBritish Nuclear Fuels Ltd (BNFL), UK, Chesire, Risley Warrington\nECN Petten, The Netherlands, Petten
Project summaryFor geological disposal of radioactive waste, it is necessary to evaluate the long-term stability characteristic of deep underground geological structures in the potential repository sites. To solve this problem it is necessary to know geological and physico-chemical conditions and besides petrophysical properties at large depth of the Earth's crust where disposal radwaste is supposed in near future.
The deepest section of the Earth's crust is Kola superdeep well. Physical properties of rocks drilled by this borehole were investigated by the departments of RIC "GERS" both by core and by logging in-situ. Important results have been received both from scientific and practical points of view, special investigations have been carried out concerning stress-deformation states and properties of massif of rocks to determine the possibilities and conditions for disposal of solidified radwaste and spent nuclear fuel.
In this connection the subjects of the project correspond to the goals of ISTC.
The work on the project is mainly aimed at the systematization, generalization and analysis of the geological, lithological, petrophysical, mineralogical and hydrogeological information obtained from deep wells in Russia.
The Kola superdeep well drilled to the depth of 12260 m will be the basic subject of inquiry. The extensive geologo-geophysical information was obtained from this well.
The key expected result of the works conducted in the limits of the proposed project is the creation of the Kola superdeep well database including the data obtained in other wells drilled in Russia. The further systematization and analysis of data including the new information obtained both from the Kola superdeep well and from other boreholes will allow to establish the new regularities in changing the geologo-geophysical characteristics along the profile out of the Earth's crust and to start handling the new application-oriented problems, for example, tackling the matter of the high-toxic and radioactive waste burial. Data base received in process of "Project" implementation will be used in future for comparison widening and accumulation of available information on rock properties and in the adoption of decisions.
The scientific significance of the designed works consists in the determination of regularities of the vertical changing the geological, mineralogical, physical and other rock properties in the Earth's crust up to the maximal depth of 12260 m reached up to nowadays for the first time in the world.
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