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Proceedings of the 5th Conference & Exposition on Petroleum Geophysics

A Quasi-3D Representation In Resistively Imaging Technique

Published in GEOHORIZONS - 2004

Sushobhan Dutta, Tanvi Arora, N.S. Krishnamurthy, V.A. Rao S. Ahmed

Abstract


: Often situation in the field, does not permit to carry out 3D survey for many reasons like paths, roads, rugged terrain where arranging of 3D survey lay out is very difficult. In those situations only close 2D survey in parallel and perpendicular direction can serve the purpose. But to build-up an image of 3D resistivity variations, those apparent resistivity values from directional profiles are separated layer by layer at a particular depth level and all directional profile data are merged so that ultimately a number of horizontal slice have been produced at different depths, which may be called a quasi-3D resistivity image of that area. In the present study 2D resistivity imaging was carried out in different cross profiles with Dipole-Dipole configuration. By merging all the cross profiles at different depth levels a 3D variation of resistivity of the study area has been prepared. Such an image has helped to locate the fracture zones in the study area much clearly, which will help for future work in ground water exploration

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