A device for generating a flow of crude oil from a plurality of hydrocarbon reservoirs to a surface location, including a set of isolation devices arranged to, at least partially, hydraulically isolate a set of segments of a wellbore traversing each of the plurality of hydrocarbon reservoirs. The device further includes a trap that receives a flow of crude oil from the plurality of hydrocarbon reservoirs and generates a comingled crude oil, and a set of conduits arranged to convey the flow of crude oil from each of the plurality of hydrocarbon reservoirs to the trap, and a blending device that blends the comingled crude oil to produce a blended crude oil. The device further includes a conduit arranged to convey the comingled crude oil from the trap to the blending device, and a conduit arranged to convey the blended crude oil to the surface location.