Conceptual and Predictive Design for Geophysical Information Measurements and Evaluation by Electrical Methods

Abstract

In the recent geophysical information measurements by electrical methods, it is worth special mention that conceptual and preliminary/predictive design for the performance of methods applied to practical problems have become more important to investigate than ever. Since geoelectrical resistivity interpretation techniques have become very useful tools for high accuracy geophysical information measurements, it may be exceedingly important for their practical application to design preliminary/predictive models and methods using computer 2D-3D or 3D simulation and visualization. In this paper, first, the significance of conceptual and preliminary/predictive design for evaluating geophysical information measurements is described, with the problems and the characteristics of geophysical target inhomogneities, fundamental research and application activities, extraction and enhancement of desired geophysical information, modeling, sensitivity analysis, standard curves catalogs, and interpretive design of models, for reliable geophysical information measurement. Next, the author reviews the three-dimensional (3D) sensitivity analysis technique and its extended method. Finally, sensitivity analysis for the improvement of accuracy of geophysical information measurements by the electrical method, the development of differential sensitivity distribution analysis technique and the examples of computerized clear image models are discussed.