«Oilfield engineering»

APPLICATION OF THE METHODS FOR CALCULATION AND BUILDING OF DENSITY MAPS OF INITIAL AND CURRENT UNDRAINED MOBILE OIL RESERVES BASED ON GEOLOGICAL-HYDRODYNAMIC MODELING DATA TO IMPROVE THE OIL RECOVERY

UDC: 622.276.1/.4:622.276.6
DOI: 10.33285/0207-2351-2021-4(628)-18-25

Authors:

¹ PJSC "Tatneft" named after V.D. Shashin, Almetyevsk, Republic of Tatarstan, Russian Federation
² LLC NPO "Neftegaztekhnologiya", Ufa, Russian Federation

Keywords: enhanced oil recovery, building of maps, Delaney triangulation, initial recoverable oil reserves

Annotation:

The article describes a method for building maps of layer-by-layer and zonal reservoir heterogeneity, oil saturation, oil displacement factor and reserves coverage. The calculations included the object division based on the Delaney triangulation into elementary triangles with wells located in their vertices and into non-overlapping polygons (Voronoi regions). Based on a number of experimental data from the TatNIPIneft, the dependence of the displacement factor on the permeability for layer-by-layer and zonal permeability heterogeneous reservoir was established using the example of the D1 horizon of the Tashliyarskaya area of the Romashkinskoye field. Using mathematical modeling, the initial recoverable oil reserves, put into development, were determined, mobile undrained oil reserves were calculated and a map was built with the allocation of areas for conducting various geological and technical measures.

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