TheMiocene formation in the area of Dzików gas field is built of very thin sandy-shaly layers and thick sandstone layers so-called Dzików sandstones. Log data from wells: Dzików-12, Dzików-13 and Dzików-15 were processed with statistical methods. Principal Component Analysis was used for grouping and specifying well log data. It contributes to reducing the number of variables from a dozen of logs to four variables. Clustering, discrimination and classification are statistical tools facilitating data arrangement and preliminary data grouping according to natural petrophysical features of analysed rocks. Applied statistical methods are helpful tool assisting interpretation of log data.
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