Journal
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
Volume 71, Issue 3-4, Pages 112-120Publisher
ELSEVIER
DOI: 10.1016/j.petrol.2009.11.001
Keywords
Borehole geophysics; Spectral exponent; Scaling behaviour; Wavelet analysis
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In order to reveal the structural properties at small scale within a geological unit apparently homogeneous at large scale, we explore the stochastic components of petrophysical measurements recorded in a borehole drilled through the Cretaceous siliclastic units of the South-eastern Basin of France. First, we analyse the instantaneous fluctuations of gamma ray log measurements searching for scaling laws in its power spectrum. Power spectra indicate a scaling behaviour with average exponent beta a values mostly falling in the range 1
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