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2D Cole Cole Inversion of Time Domain Induced Polarization Data - Model Studies and Field Measurements
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Near Surface Geoscience 2014 - 20th European Meeting of Environmental and Engineering Geophysics, Sep 2014, Volume 2014, p.1 - 5
Abstract
Summary
A 2D inversion algorithm for time domain induced polarization data has been developed. The IP transients are inverted into 2D Cole Cole models including resistivity, chargeability, relaxation time, and frequency constants. In order to speed up the inversion procedure, an approximate forward algorithm has been used which is highly accurate and its validity was tested with exact solutions up to 3D. In the 2D inversion procedure, a 3D DC forward algorithm has been used as forward operator. The method requires a conventional 2D DC inversion and a homogenous half space Cole-Cole inversion to derive the Cole Cole parameters of each cell. Synthetic model studies and a field example will be demonstrated.
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