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f A Borehole Resistivity Array for Single Hole and Cross Hole Tomographic Imaging
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 57th EAGE Conference and Exhibition, May 1995, cp-90-00174
- ISBN: 978-90-73781-06-1
Abstract
An electrical resistivity imaging technique has been developed using an extendible array of electrodes that can be deployed up to depths of 1 km using standard 7 core logging cable. Examples are given of an array of 45 electrodes spaced at 1m intervals used both at depths over 300m within a high resistivity environment and near the surface in shallow boreholes which were augmented using surface electrodes in a low resistivity environment. The benefits of using single-hole measurements in addition to cross-hole ones as part of the inversion procedure is discussed.