Method of Determining Queried Fluid Cuts Along a Tubular

Abstract

A method of identifying a queried fluid cut along a tubular includes, determining a first flow rate of a queried fluid flowing through all open zones, determining a flow rate of liquid through a selected zone, and closing the selected zone, determining a second flow rate of the queried fluid flowing through all open zones, and attributing a queried fluid cut to the selected zone as a percentage that the difference between the first flow rate of the queried fluid and the second flow rate of the queried fluid is of the flow rate of liquid through the selected zone.

1 . A method of determining queried fluid cuts along a tubular comprising:
 determining a first flow rate of a queried fluid produced from a plurality of zones along the tubular;   measuring a liquid flow rate produced by a selected zone of the plurality of zones;   ceasing production from the selected zone;   determining a second flow rate of the queried fluid produced from the plurality of zones along the tubular minus the selected zone; and   determining a queried fluid cut of the selected zone as a percentage of the liquid flow rate produced by the selected zone that a loss between the first flow rate of the queried fluid and the second flow rate of the queried fluid represents.   
     
     
         2 . The method of determining queried fluid cuts along a tubular of  claim 1 , further comprising repeating the foregoing process until all of the plurality of zones have been closed and a queried fluid cut of each zone has been determined. 
     
     
         3 . The method of determining queried fluid cuts along a tubular of  claim 1 , further comprising closing the plurality of zones sequentially. 
     
     
         4 . The method of determining queried fluid cuts along a tubular of  claim 3 , wherein the closing sequentially starts with closing the zone nearest to a queried fluid cut measuring apparatus then continues with closing the zone next nearest to the queried fluid cut measuring apparatus and so on. 
     
     
         5 . The method of determining queried fluid cuts along a tubular of  claim 1 , further comprising ascribing values of queried fluid cuts that are greater than one and less than zero to errors requiring redoing at least a portion of the foregoing process. 
     
     
         6 . The method of determining queried fluid cuts along a tubular of  claim 1 , wherein the determining the first flow rate of the queried fluid produced from the plurality of zones along the tubular further comprises:
 measuring a first flow rate produced from the plurality of zones;   measuring a first queried fluid cut of the first flow rate; and   calculating the first flow rate of the queried fluid produced from the plurality of zones.   
     
     
         7 . The method of determining queried fluid cuts along a tubular of  claim 1 , wherein the determining the second flow rate of the queried fluid produced from the plurality of zones along the tubular minus the selected zone further comprises:
 measuring a second flow rate produced from the plurality of zones minus the selected zone;   measuring a second queried fluid cut of the second flow rate; and   calculating the second flow rate of the queried fluid produced from the plurality of zones minus the selected zone.   
     
     
         8 . The method of determining queried fluid cuts along a tubular of  claim 1 , wherein the queried fluid is water. 
     
     
         9 . A method of determining queried fluid cuts along a tubular comprising:
 determining liquid produced by all zones along the tubular;   determining a queried fluid cut of the liquid produced by all of the zones;   calculating a queried fluid produced by all of the zones;   determining liquid produced by a selected zone along the tubular;   closing the selected zone;   determining liquid produced by all zones except the selected zone;   determining a queried fluid cut of the liquid produced by all zones except the selected zone;   calculating a queried fluid produced by all of the zones except the selected zone; and   calculating the queried fluid cut for the selected zone as a difference in the queried fluid produced by all of the zones and the queried fluid produced by all of the zones except the selected zone and dividing by the liquid produced by the selected zone.   
     
     
         10 . The method of determining queried fluid cuts along a tubular of  claim 9 , further comprising repeating the foregoing steps until a queried fluid cut from each zone is determined. 
     
     
         11 . A method of identifying a queried fluid cut along a tubular, comprising:
 determining a first flow rate of a queried fluid flowing through all open zones;   determining a flow rate of liquid through a selected zone;   closing the selected zone;   determining a second flow rate of the queried fluid flowing through all open zones; and   attributing a queried fluid cut to the selected zone as a percentage that the difference between the first flow rate of the queried fluid and the second flow rate of the queried fluid is of the flow rate of liquid through the selected zone.