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Patent
G - Physics
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G01V 1/40 (2006.01) E21B 47/04 (2006.01) E21B 47/12 (2006.01) G01V 1/44 (2006.01) G01V 3/18 (2006.01) G01V 7/00 (2006.01)
Patent
CA 2320393
A plurality of micro boreholes are drilled away from a production borehole in proximity to a hydrocarbon reservoir from which oil or gas is being produced. Detectors are permanently implanted in these micro boreholes. By using transmitters in the production borehole or in one or more of the lateral boreholes, signals are sent into the formation that are responsive to the position of a fluid-fluid interface within the producing reservoir. Processing of the detected signals makes it possible to monitor the location of the fluid interface and to operate flow control devices in the production borehole to avoid coning or the breakthrough of an undesirable fluid into the borehole. An embodiment of the invention uses permanently installed seismic, electromagnetic, gravity or pressure sensors in the proximity of the producing zone to detect changes in the fluid level.
Aronstam Peter Sheffield
Schmidt Mathew G.
Workman Rick L.
Baker Hughes Incorporated
Gowling Lafleur Henderson Llp
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