DC Resistivity Survey (Dipole-Dipole Array)
From Open Energy Information
Exploration Technique: DC Resistivity Survey (Dipole-Dipole Array)
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Field Procedures
| Exploration Technique Information | |
|---|---|
| Exploration Group: | Geophysical Techniques |
| Exploration Sub Group: | Electrical Techniques |
| Parent Exploration Technique: | Electrical Profiling Configurations |
| Information Provided by Technique | |
| Lithology: | Rock composition, mineral and clay content |
| Stratigraphic/Structural: | Detection of permeable pathways, fracture zones, faults |
| Hydrological: | Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water |
| Thermal: | Resistivity influenced by temperature |
DC Resistivity Survey (Dipole-Dipole Array):
The Dipole-Dipole array is a type of electrode configuration for a Direct-Current Resistivity Survey and is defined by its electrode array geometry.
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The dipole-dipole electrode array consists of two sets of electrodes, the current (source) and potential (receiver) electrodes. A dipole is a paired electrode set with the electrodes located relatively close to one another; if the electrode pair is widely spaced it is referred to as a bipole.[2] The convention for a dipole-dipole electrode array is to maintain an equal distance for both the current and the potential electrodes (spacing = a), with the distance between the current and potential electrodes as an integer multiple of a.[3] The electrodes do not need to be located along a common survey line. [4]
A primary advantage of the dipole-dipole electrode array is the ease of deployment in the field due to shorter wire lengths. However, a large generator may be needed to transmit a greater current magnitude for the measurement, especially for deep soundings. [5][2]
DC Resistivity electrode array: Dipole-Dipole configuration and apparent resistivity[3]
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