Complementary Entropy and Wavelet Analysis of Drilling-Ability Data

Authors: Frantziskonis, G.1; Denis, A.2

Source: Mathematical Geology, Volume 35, Number 1, January 2003 , pp. 89-103(15)

Publisher: Springer

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Abstract:



The paper combines wavelet and entropy analysis of nonstationary drilling-ability data in order to obtain optimum information on the mechanical behavior of different geological formations. Both methods are multiscale in nature, and while entropy analysis provides information on stationary subdomains, wavelet analysis identifies dominant scales or range of scales at which the entropy analysis is most useful. The combination of the techniques yields relatively simple results that can aid the drilling process by providing information on delays to be expected.

Keywords: multiscale; nonstationary; spatial series; tunnelling

Document Type: Research Article

Affiliations: 1: Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, Arizona 85721; frantzis@email.arizona.edu 2: Centre de Développement des Géosciences Appliquées, Université Bordeaux I, 33405 Talence, France; adenis@cdga.u-bordeaux.fr

Publication date: January 1, 2003

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