Methods of well logging used for borehole correlation in the granite stock, Podlesí granite, Bohemian Massif


Authors: Lukeš J

Published in: Bulletin of Geosciences, volume 80, issue 2; pages: 155 - 161; Received 1 July 2004; Accepted in revised form 11 March 2005;

Keywords: well logging, fractured granites, groundwater cross-connection, correlation of curves,

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The main results from the final well logging measurement of the PTP4A borehole are presented. The correlation of selected logging methods from the boreholes PTP3 and PTP4A, drilled 10 m apart, is shown. A combination of hydraulic stress tests in PTP4A and simultaneous fluid resistivity logging in PTP3 confirmed the presence of a subsurface hydrogeological connection through water-permeable fractures between both boreholes. Despite the short distance between the boreholes, the water from some horizontal fractures was redirected through highly permeable vertical ones.