System and method for downhole monitoring of fluid flow
AssigneeWellstarter AS
InventorsFridtjof Nyhavn, Terje Moen
Life of this patent
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Abstract
A system and method for monitoring fluid flow in a downhole reservoir, characterized by at least one energy source (1), which simultaneously sends two or more utility pulses. The pulse can be a fast propagating and flow-independent acoustic pulse, a somewhat slower propagating and flow-dependent pressure pulse, a slow propagating heat pulse or a slow-propagating tracer pulse. The energy sources are connected via said pulses, without cable, and at least an upper heat source (1′) is connected to equipment on the surface via a cable (4).
Claims16
A system for monitoring of fluid flow in a downhole reservoir zone (R), said system comprising a downhole completion comprising a tubular (2) arranged in the reservoir zone (R), and comprising:
- heat sources (1, 1a, b) attached to the tubular (2) and each configured to, by exothermic reactions, generate acoustic pulses that propagate in a solid wall of the tubular (2) in the downhole completion, wherein each heat source is of a first configuration (1a) arranged to heat up fluids on the outside of the tubular (2) or of a second configuration (1b) to heat up fluids inside the tubular (2), and wherein the heat sources are connected via said acoustic pulses, without cable, and further comprising at least one upper heat source (1′) arranged on an upper completion and connected to equipment on the surface via a cable (4);
- and
- a downhole sensor which is arranged to receive at least one of the acoustic pulses.
Dependencies are inferred from the claim text.