Quantitative characterization of mineralogy, lithology and physical properties from downhole measurements

Results: Quantitative mineralogy and lithology from a classical set of logs, flow properties of the formation, physical properties of rocks and minerals

Data: use of downhole measurements and sample lab measurements in an integrated scheme Techniques (left): sound combination of multivariate statistical classifications, Bayesian inference, neural networks and inversion methods Illustrations (up and left) taken from a multi-well study of low-resistivity (chlorite-coated) sandstones oil reservoirs (Rabaute et al., 2003a), funded by TOTAL, BP, ANADARKO and AGIP.