Monitoring of multilayer reservoirs
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United States of America Patent
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May 30, 2017
Grant Date -
Jun 25, 2015
app pub date -
Jul 1, 2013
filing date -
Jul 2, 2012
priority date (Note) -
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Abstract
A method and system is described for estimating flow rates of fluids from each of separate influx zones in a multilayered reservoir to a production flow (Q) in a well (Wr) in the reservoir, the well having at least two separate influx zones from the multilayer reservoir of known positions along the well, the well being provided with distinct tracer sources with distinct tracer materials of known positions in each of the at least two separate influx zones. Each influx zone is provided with a delay path for a tracer leakout stream flow from that influx zone. The method includes providing a global production flow change for the production flow in the well, establishing tracer concentrations in the production flow of the distinct tracer materials as a function of time, and estimating the production rates from each of the separate influx zones in the reservoir.
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