US 12,460,542 B2
Method and apparatus for quantitative multi-phase downhole surveillance
Thomas Sperle, Ranheim (NO); and Øystein Mølstre, Ranheim (NO)
Assigned to Resman AS, Ranheim (NO)
Filed by RESMAN AS, Ranheim (NO)
Filed on May 15, 2024, as Appl. No. 18/664,359.
Application 18/664,359 is a continuation of application No. 17/613,733, granted, now 12,012,848, previously published as PCT/EP2020/064348, filed on May 23, 2020.
Claims priority of application No. 1907388 (GB), filed on May 24, 2019.
Prior Publication US 2024/0328306 A1, Oct. 3, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 47/11 (2012.01); E21B 43/38 (2006.01); E21B 49/08 (2006.01)
CPC E21B 47/11 (2020.05) [E21B 43/38 (2013.01); E21B 49/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for quantitative downhole surveillance of a multi-phase flow in a hydrocarbon well, wherein the multi-phase flow comprises at least two phases, the well comprising at least one shunt chamber; wherein the at least one shunt chamber comprises:
a flow phase separation section;
at least one delay chamber;
a tracer releasing system for at least one tracer; and
at least one flow restrictor in fluid communication with the at least one delay chamber;
the method comprising:
separating flow in the shunt chamber into at least two phases;
releasing at least one tracer into the at least one delay chamber;
flushing out the flow with the at least one tracer from the shunt chamber into the production flow,
monitoring the at least one tracer in a production flow at a detection point downstream of the at least one shunt chamber;
measuring the concentration of the at least one tracer in a monitored flow.