US 11,946,364 B2
Removing guided wave noise from recorded acoustic signals
Yao Ge, Singapore (SG); Ruijia Wang, Singapore (SG); Philip William Tracadas, Houston, TX (US); Yi Yang Ang, Singapore (SG); and Xiang Wu, Singapore (SG)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jul. 7, 2020, as Appl. No. 16/922,513.
Claims priority of provisional application 62/913,626, filed on Oct. 10, 2019.
Prior Publication US 2021/0108510 A1, Apr. 15, 2021
Int. Cl. E21B 47/107 (2012.01); G01N 29/38 (2006.01); G01N 29/40 (2006.01); G01N 29/42 (2006.01); G01V 1/50 (2006.01)
CPC E21B 47/107 (2020.05) [G01N 29/38 (2013.01); G01N 29/40 (2013.01); G01N 29/42 (2013.01); G01V 1/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for removing a guided wave noise in a time-domain, comprising:
recording one or more acoustic signals with one or more receivers on an acoustic logging tool at a first location, wherein the one or more acoustic signals are raw data;
determining a slowness range;
estimating a downward guided wave noise by stacking the one or more acoustic signals based at least in part on a positive slowness;
estimating an upward guided wave noise by stacking the one or more acoustic signals based at least in part on a negative slowness;
identifying a dominant direction of propagation;
identifying a slowness from a highest stacked amplitude for the dominant direction of propagation;
estimating a downward guided wave noise with the slowness;
estimating an upward guided wave noise with the slowness;
subtracting the downward guided wave noise and the upward guided wave noise from the raw data; and
moving the acoustic logging tool to a second location, wherein the second location is determined by the one or more acoustic signals.