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f NUMERICAL MODELING TO ASSESS THE IMPACT OF POSITIONAL ERRORS DURING THE ACQUISITION OF WATERBORNE CONTINUOUS RESISTIVITY MEASUREMENTS
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 25th Symposium on the Application of Geophpysics to Engineering & Environmental Problems, Mar 2012, cp-329-00100
Abstract
Waterborne continuous resistivity profiling (WCRP) permits rapid collection of direct current (DC) resistivity data over water by means of towing a multi-electrode cable streamer behind a moving vessel. During WCRP electrical current is injected using a pair of electrodes, while multiple potential measurements are made using other pairs of electrodes. This acquisition results in a near continuous profile of measured resistances along the survey path. These data are then processed/inverted to produce a 2.5D resistivity model, which can be used to interpret physical subsurface properties (i.e. lithology, and pore fluid conductivity).