Creation a permeability array for simulation model of a complex carbonate reservoir with zonal heterogeneity

Abstract

The study presents an approach to creating a simulation model of a complex reservoir based on the integration of multi-scale studies that make it possible to understand the alternation of different types of reservoirs along the lateral and vertical. For various types of reservoir, petrophysical dependences of permeability on porosity were built, which became the basis for the original permeability array of the model. The refined permeability array made it possible to significantly improve the history matching to the actual data after the first iteration. In this research, an array of Voronoi polygons was built, which allowed further targeted modification of petrotypes in the area of wells, taking into account the actual dynamics of well rates. Based on the results of calculations, by local modifications, the cumulative oil and liquid production were matched. Proposed approach of fissures distribution made it possible to reduce the degree of uncertainty of filtration parameters during history matching of the model to actual development data and increase the reliability of forecast calculations. Keywords: carbonate reservoir; reservoir simulation modeling; permeability fracturing; reservoir properties.