Methodological support of verification control of geological and hydrodynamic models and forecast flow rates based on the results of operational drilling of wells

Abstract

In аrticle we analyze the drilling results based on three-dimensional geological and hydrodynamic models based on data from 115 wells in 28 different fields in the Volga-Ural and Timan-Pechora oil and gas provinces. The analysis of the results of production drilling of wells on the accepted geological and hydrodynamic models was carried out. The confirmation of the main elements of the geological three-dimensional model is considered. To differentiate the reasons for the deviation of the forecast flow rates associated with geological and hydrodynamic modeling, it is suggested to use the graph of comparison of the relative deviation of flow rates and the filtrationcapacitive properties predicted on the geological model. Efficiency and visibility of the separation of geological and technological reasons for the unconfirmed debits on the chart showed that, first of all, the factors related to reservoir development technologies and the forecast of the hydrodynamic model influence the flow rates. The study allows to choose effective measures to reduce the risk of failure to reach the planned production at oil fields, it is proposed to improve the methods of geological and hydrodynamic modeling in the direction of the development of the use of multivariate modeling technologies. Keywords: reservoir; predicted oil production; reservoir simulation modeling; porosity; permeability; reservoir properties.