The article covers the statistical evaluation method of efficiency of geological and technical actions (well interventions) in producing well stock, based on their hydrodynamic interactions. The analysis of increasing the rate of fluid sampling from wells of Mykhpaiskaya area, Samotlor oilfield, has been completed. Based on small sample theory the hypotheses was tested with respect to the statistical significance of mean well flow rates difference prior to geological and technical actions and following them.
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