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1.发明授权Method and apparatus for acoustic logging of fluid density and wet cement plugs in boreholes 有权用于声学测井的方法和装置，用于钻孔中的流体密度和湿式水泥塞
公开(公告)号：US6050141A
公开(公告)日：2000-04-18
申请号：US141796
申请日：1998-08-28
IPC分类号： E21B21/08 , E21B47/00 , E21B47/10 , E21B49/00 , G01N29/032 , G01N29/22 , G01N29/34 , G01N29/38 , G01V1/44 , G01T1/16
CPC分类号： E21B47/101 , E21B21/08 , E21B47/0005 , E21B49/005 , G01N29/032 , G01N29/225 , G01N29/348 , G01N29/38 , G01V1/44 , G01N2291/011 , G01N2291/018 , G01N2291/022 , G01N2291/02818
摘要： A method of determining the acoustic impedance of a fluid in a borehole, by gating a reflected acoustic signal into a plurality of time slots, and comparing received energies of the signal for the time slots to obtain a value indicative of the acoustic impedance of the fluid. The value may be normalized to yield the acoustic impedance of the fluid using the acoustic impedance of, e.g., water as a calibration point. The comparison is performed by comparing a ratio of an integration of a first ring down time slot and a second ring down time slot, to an integration of an internal reflection time slot. The acoustic pulse may be generated using a transducer immersed in an intermediate fluid contained within a chamber defined in part by a plate in contact with the borehole fluid and having a thickness such that a mechanical resonance frequency of the plate in a thickness mode is substantially equal to a resonance frequency of the transducer. The sonic velocity of the fluid is also measured and, when combined with the acoustic impedance, is used to determine the fluid density.
摘要翻译： 一种确定井眼中的流体的声阻抗的方法，通过将反射的声信号选通到多个时隙中，以及比较所述时隙的信号的接收能量，以获得指示流体的声阻抗的值 。 该值可以被归一化以产生使用例如作为校准点的水的声阻抗的流体的声阻抗。 通过比较第一衰落时间和第二衰落时隙的积分比与内部反射时隙的积分来进行比较。 声脉冲可以使用浸入在包含在由与井眼流体接触的板部分限定的室内的中间流体中的换能器来产生，并且具有使得板在厚度模式下的机械共振频率基本相等的厚度 到换能器的共振频率。 还测量流体的声速，并且当与声阻抗组合时，用于确定流体密度。
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2.发明授权公开(公告)号：US06538958B1
公开(公告)日：2003-03-25
申请号：US09443409
申请日：1999-11-19
IPC分类号： G01V140
CPC分类号： E21B47/101 , E21B21/08 , E21B47/0005 , E21B49/005 , G01N29/032 , G01N29/225 , G01N29/348 , G01N29/38 , G01N2291/011 , G01N2291/018 , G01N2291/022 , G01N2291/02818 , G01V1/44
摘要： The acoustic impedance of a fluid in a borehole is determined by gating a reflected acoustic signal into a plurality of time slots, and comparing received energies of the signal for the time slots to obtain a value indicative of the acoustic impedance of the fluid. The value may be normalized to yield the acoustic impedance of the fluid using the acoustic impedance of, e.g., water as a calibration point. The acoustic pulse may be generated using a transducer immersed in an intermediate fluid contained within a chamber defined in part by a plate in contact with the borehole fluid and having a thickness such that a mechanical resonance frequency of the plate in a thickness mode is substantially equal to a resonance frequency of the transducer. The sonic velocity of the fluid is also measured and, when combined with the acoustic impedance, is used to determine fluid density.
摘要翻译： 通过将反射的声学信号门控成多个时隙来确定钻孔中的流体的声阻抗，并且比较用于时隙的信号的接收能量，以获得指示流体的声阻抗的值。 该值可以被归一化以产生使用例如作为校准点的水的声阻抗的流体的声阻抗。 声脉冲可以使用浸入在包含在由与井眼流体接触的板部分限定的室内的中间流体中的换能器来产生，并且具有使得板在厚度模式下的机械共振频率基本相等的厚度 到换能器的共振频率。 还测量流体的声速，并且当与声阻抗组合时，用于确定流体密度。
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3.发明授权Method and apparatus for acoustic logging of fluid density and wet cement plugs in boreholes 有权用于声学测井的方法和装置，用于钻孔中的流体密度和湿式水泥塞公开(公告)号：US06189383B1
公开(公告)日：2001-02-20
申请号：US09329215
申请日：1999-06-10
IPC分类号： G01V100
CPC分类号： E21B47/101 , E21B21/08 , E21B47/0005 , E21B49/005 , G01N29/032 , G01N29/225 , G01N29/348 , G01N29/38 , G01N2291/011 , G01N2291/018 , G01N2291/022 , G01N2291/02818 , G01V1/44
摘要： A method of determining the acoustic impedance of a fluid in a borehole, by gating a reflected acoustic signal into a plurality of time slots, and comparing received energies of the signal for the time slots to obtain a value indicative of the acoustic impedance of the fluid. The value may be normalized to yield the acoustic impedance of the fluid using the acoustic impedance of, e.g., water as a calibration point. The comparison is performed by comparing a ratio of an integration of a first ring down time slot and a second ring down time slot, to an integration of an internal reflection time slot. The acoustic pulse may be generated using a transducer immersed in an intermediate fluid contained within a chamber defined in part by a plate in contact with the borehole fluid and having a thickness such that a mechanical resonance frequency of the plate in a thickness mode is substantially equal to a resonance frequency of the transducer. The sonic velocity of the fluid is also measured and, when combined with the acoustic impedance, is used to determine the fluid density.
摘要翻译： 一种确定井眼中的流体的声阻抗的方法，通过将反射的声信号选通到多个时隙中，以及比较所述时隙的信号的接收能量，以获得指示流体的声阻抗的值 。 该值可以被归一化以产生使用例如作为校准点的水的声阻抗的流体的声阻抗。 通过比较第一衰落时间和第二衰落时隙的积分比与内部反射时隙的积分来进行比较。 声脉冲可以使用浸入在包含在由与井眼流体接触的板部分限定的室内的中间流体中的换能器来产生，并且具有使得板在厚度模式下的机械共振频率基本相等的厚度 到换能器的共振频率。 还测量流体的声速，并且当与声阻抗组合时，用于确定流体密度。
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