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The paper presents the application of the methods of statistical analysis to the determination of the similarity of measurement data, using boreholes providing access to shale formations as an example. The proposed methodology is based on two statistical techniques: the factor analysis and the cluster analysis. The first method allows the reduction of the number of measurements variables in order to eliminate the redundancy of the data. The second one allows grouping the wells on the grounds of factor variables defining the similarity features of the analysed wells. The available results of geochemical measurements for nine wells providing access to shale structures have been used as measurement data.

Determination of the statistical similarity of the physicochemical measurement data of shale formations based on the methods of cluster analysis