The paper presents the results of statistical regression analysis of hydraulic fracturing efficiency in discontinuous formations. Sweep efficiency was determined using stochastic lithological cubes built with the Irap RMS simulation package. It has been found that hydrofracturing is effective in discontinuous formations characterized by large number of permeable intervals in the section and small-sized sand lenses relative to distance between wells, i.e. hydrofrac efficiency increases with increase of macroinhomogeneity.
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