Economic justification of the need to drill wells with separate operation of several horizons at the same time

The article provides a complete study of the possibility of simultaneous development of several formations by one object only with the same physical and chemical properties of oil in the combined formations, if the inflow of oil and gas is sufficient from each formation at an acceptable bottom-hole pressure in the well, with close values of reservoir pressure in the combined formations, excluding oil flows between the layers, and close values waterlogged formations. It also describes the field experience of operating several layers with one well by the method of dual completion (DC), indicating its high efficiency. On average, capital investments and operating costs are reduced by 30% in comparison with the costs of drilling and operating fields with independent grids for each formation. The DC method is cost-effective and makes it possible to seal the grid of wells (producing and injection) without additional drilling footage.