Definition of Horizontal and Vertical wells Ratio in Defining of Wells Density Grid

Oil fields have a wide range of reservoir property values, the size of the oil-saturated area, layered character and areal heterogeneity, etc. Unlimited variety of possible combinations of these parameters is the basis of decision limited by the possibilities of design solutions: recovery method, selection of productive formation, well paterns and wells density grid. Oil recovery factor and investments for field development both depend on wells density grid. For horizontal and multibranch wells concept of wells density grid need an upgrade. Lots of parameters should be taken into account for quantation of horizontal and vertical wells ratio. Horizontal wells take an influence on oil recovery, which could be determined with index of real formation coverage increase by horizontal wells drainage. For any productive formation horizontal and vertical ratio in wells density grid defining will be unique. 3D modeling provides an opportunity to large-scale mathematical calculations with different wells density grids and recovery methods. Hydrodynamic modeling provides to find wells density grid for any field recovering by horizontal wells.