US 12,352,162 B2
Fluid holdup monitoring in downhole fluid sampling tools
Zhonghuan Chen, Houston, TX (US); Bin Dai, Houston, TX (US); Christopher Michael Jones, Houston, TX (US); and Wei Zhang, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jul. 1, 2024, as Appl. No. 18/760,237.
Application 18/760,237 is a division of application No. 17/572,684, filed on Jan. 11, 2022, granted, now 12,055,038.
Prior Publication US 2024/0352854 A1, Oct. 24, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 49/08 (2006.01); G01N 9/32 (2006.01); G01N 21/3577 (2014.01); G01N 21/17 (2006.01)
CPC E21B 49/081 (2013.01) [G01N 9/32 (2013.01); G01N 21/3577 (2013.01); G01N 2021/178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method to identify fluid holdups during downhole fluid sampling operations, the method comprising:
obtaining, using a sampling tool positioned within a wellbore, one or more fluid measurements using at least one sensor having a first set of spatial resolution;
obtaining, using the sampling tool, one or more second fluid measurements having a second spatial resolution;
calculating a first fluid ratio using the at least one sensor having the first set of spatial resolution measurements;
calculating a second fluid ratio of the second fluid measurements using the at least one sensor having the second set of spatial resolution, wherein the second set of spatial resolution is lower than the first set of spatial resolution; and
identifying fluid holdup within the sampling tool when differences between the two fluid ratios are higher than a limit or a similarity of the two fluid ratios are lower than a limit.