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公开(公告)号：US20200033494A1
公开(公告)日：2020-01-30
申请号：US16523559
申请日：2019-07-26
摘要： Methods and apparatuses for evaluating an earth formation intersected by a borehole. Methods include estimating a property of cement surrounding a tubular in the earth formation by: generating an acoustic signal with a logging tool in the borehole; estimating the property in dependence upon a late reflected wave field of a modified response acoustic signal, wherein the modified response acoustic signal is produced by suppression of a direct mode component.
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公开(公告)号：US20190196041A1
公开(公告)日：2019-06-27
申请号：US16227609
申请日：2018-12-20
CPC分类号： G01V1/50 , E21B47/01 , E21B47/18 , G01V1/46 , G01V2210/6224 , G01V2210/673
摘要： Methods, systems, and devices for downhole evaluation using a sensor assembly that includes a sensor plate, wherein a surface of the sensor plate forms a portion of a surface of a downhole tool. Methods include bringing the surface of the sensor plate into contact with downhole fluid; generating a guided wave that propagates in the sensor plate by activating the sensor assembly at at least one frequency configured to excite both a symmetric mode and an anti-symmetric mode; making at least one first attenuation measurement of the symmetric mode of the guided wave; making at least one second attenuation measurement of the anti-symmetric mode of the guided wave; and using the at least one first attenuation measurement and the at least one second attenuation measurement to estimate at least one parameter of interest of the fluid. Methods may include submerging the surface of the sensor plate in a downhole fluid.
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公开(公告)号：US11378708B2
公开(公告)日：2022-07-05
申请号：US16227609
申请日：2018-12-20
IPC分类号： G01V1/50 , G01V1/46 , E21B47/01 , E21B47/18 , E21B47/005 , E21B47/107
摘要： Methods, systems, and devices for downhole evaluation using a sensor assembly that includes a sensor plate, wherein a surface of the sensor plate forms a portion of a surface of a downhole tool. Methods include bringing the surface of the sensor plate into contact with downhole fluid; generating a guided wave that propagates in the sensor plate by activating the sensor assembly at at least one frequency configured to excite both a symmetric mode and an anti-symmetric mode; making at least one first attenuation measurement of the symmetric mode of the guided wave; making at least one second attenuation measurement of the anti-symmetric mode of the guided wave; and using the at least one first attenuation measurement and the at least one second attenuation measurement to estimate at least one parameter of interest of the fluid. Methods may include submerging the surface of the sensor plate in a downhole fluid.
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公开(公告)号：US11066920B2
公开(公告)日：2021-07-20
申请号：US15809779
申请日：2017-11-10
IPC分类号： E21B47/002 , E21B47/12 , E21B41/02 , E21B47/005 , G01N21/954
摘要： Methods and apparatus for inspecting oilfield infrastructure components. Methods include estimating an optimal value for at least one excitation parameter for an acoustic excitation source to produce a guided wave of mixed multiple modes in the component; selecting at least one excitation parameter corresponding to an optimal simulated guided wave determined in dependence upon the application of waveform criteria to the time domain waveforms; and generating a guided wave in the tubular using the at least one optimal excitation parameter. Methods may include calculating a guided wave dispersion relation; modeling each of the plurality of simulated guided waves, wherein the modeling comprises generating a time domain waveform for each of a plurality of wave modes in dependence upon the acoustic excitation source; selecting the at least one excitation parameter corresponding to an optimal simulated guided wave determined in dependence upon the application of waveform criteria to the time domain waveforms.
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