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    FORMATION RESISTIVITY MEASUREMENTS USING PHASE CONTROLLED CURRENTS
    5.
    发明申请
    FORMATION RESISTIVITY MEASUREMENTS USING PHASE CONTROLLED CURRENTS 有权
    使用相位控制电流形成电阻率测量

    公开(公告)号：US20130027045A1

    公开(公告)日：2013-01-31

    申请号：US13359581

    申请日：2012-01-27

    申请人： Leonty A. Tabarovsky ,  Stanislav W. Forgang

    发明人： Leonty A. Tabarovsky ,  Stanislav W. Forgang

    IPC分类号： G01V3/02

    CPC分类号： G01V3/24 ,  E21B47/102

    摘要： Disclosed is an apparatus for estimating a property of an earth formation penetrated by a borehole. The apparatus includes a carrier configured to be conveyed through the borehole and having a first transmitter electrode configured to inject electrical current into the formation and a first measurement electrode configured to receive electrical current for measurement due to the current injection in order to estimate the property of the earth formation. A controller is configured to determine a phase difference between injected electrical current and received electrical current. A first bucker amplifier is coupled to the first measurement electrode and configured to apply a voltage to the first measurement electrode based on the determined phase difference in order for a phase of current received by the first measurement electrode to be substantially in phase with the current injected by the first transmitter electrode.

    摘要翻译： 公开了一种用于估计钻孔穿透的地层的性质的装置。 该装置包括：载体，被构造成通过钻孔传送，并具有配置成将电流注入到地层中的第一发射器电极;以及第一测量电极，其被配置为接收由于电流注入而进行测量的电流，以便估计 地球形成。 控制器被配置为确定注入的电流和接收的电流之间的相位差。 第一压差放大器耦合到第一测量电极，并且被配置为基于所确定的相位差向第一测量电极施加电压，以使由第一测量电极接收的电流的相位与注入的电流基本上同相 由第一发射机电极。

    Method and apparatus for resistivity imaging in boreholes with an antenna and two spaced apart electrodes
    7.
    发明授权
    Method and apparatus for resistivity imaging in boreholes with an antenna and two spaced apart electrodes 有权
    在具有天线和两个间隔开的电极的钻孔中进行电阻率成像的方法和装置

    公开(公告)号：US08203344B2

    公开(公告)日：2012-06-19

    申请号：US11521016

    申请日：2006-09-14

    申请人： Randy Gold ,  Rashid W. Khokhar ,  Alexandre N. Bespalov ,  Leonty A. Tabarovsky ,  Gregory B. Itskovich

    发明人： Randy Gold ,  Rashid W. Khokhar ,  Alexandre N. Bespalov ,  Leonty A. Tabarovsky ,  Gregory B. Itskovich

    IPC分类号： G01V3/00

    CPC分类号： G01V3/24

    摘要： An apparatus, method and computer-readable medium for evaluating an earth formation are disclosed. The apparatus includes at least one coil on a logging tool conveyed in a borehole in the earth formation. Passage of a current through the coil induces an electrical current in the earth formation. At least two electrodes associated with the logging tool and in proximity to a wall of the borehole have a potential difference in response to the induced electrical current that is indicative of a property of the earth formation. The at least one coil may be mounted on a mandrel of a downhole assembly. The electrodes may be positioned on a first pad extendable from a mandrel of the downhole assembly.

    摘要翻译： 公开了一种用于评估地层的装置，方法和计算机可读介质。 该装置包括在地层中的钻孔中输送的测井工具上的至少一个线圈。 通过线圈的电流在地层中引起电流。 与测井工具相关联并且靠近钻孔壁的至少两个电极具有响应于感应电流的电位差，其表示地层的性质。 至少一个线圈可以安装在井下组件的心轴上。 电极可以定位在可从井下组件的心轴延伸的第一垫上。

    Method and Apparatus for Resistivity Imaging in Boreholes Filled with Low Conductivity Fluids
    9.
    发明申请
    Method and Apparatus for Resistivity Imaging in Boreholes Filled with Low Conductivity Fluids 有权
    用低电导率液体填充孔洞的电阻率成像方法和装置

    公开(公告)号：US20080068024A1

    公开(公告)日：2008-03-20

    申请号：US11852900

    申请日：2007-09-10

    申请人： Randy Gold ,  Rashid W. Khokhar ,  Alexandre N. Bespalov ,  Leonty A. Tabarovsky

    发明人： Randy Gold ,  Rashid W. Khokhar ,  Alexandre N. Bespalov ,  Leonty A. Tabarovsky

    IPC分类号： G01V3/20 ,  G01V3/02 ,  G01V3/34

    CPC分类号： G01V3/24

    摘要： A mixed mode tool uses an inductive source and detects galvanic currents and/or potentials at electrodes in proximity to a borehole wall to produce a resistivity image of the earth formation. Alternative, the magnetic field produced by a galvanic current is detected by an antenna coil and used to produce a resistivity image. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understand that it will not be used to interpret or limit the scope or meaning of the claims.

    摘要翻译： 混合模式工具使用感应源并检测靠近钻孔壁的电极处的电流和/或电位，以产生地层的电阻率图像。 可选地，由电流产生的磁场由天线线圈检测并用于产生电阻率图像。 要强调的是，该摘要被提供以符合要求摘要的规则，这将允许搜索者或其他读者快速确定技术公开的主题。 提交的理由是，它不会用于解释或限制权利要求的范围或含义。

    Formation resistivity measurements using phase controlled currents
    10.
    发明授权
    Formation resistivity measurements using phase controlled currents 有权
    使用相位控制电流的地层电阻率测量

    公开(公告)号：US09223047B2

    公开(公告)日：2015-12-29

    申请号：US13359581

    申请日：2012-01-27

    申请人： Leonty A. Tabarovsky ,  Stanislav W. Forgang

    发明人： Leonty A. Tabarovsky ,  Stanislav W. Forgang

    IPC分类号： G01V3/24 ,  E21B47/10

    CPC分类号： G01V3/24 ,  E21B47/102

    摘要： Disclosed is an apparatus for estimating a property of an earth formation penetrated by a borehole. The apparatus includes a carrier configured to be conveyed through the borehole and having a first transmitter electrode configured to inject electrical current into the formation and a first measurement electrode configured to receive electrical current for measurement due to the current injection in order to estimate the property of the earth formation. A controller is configured to determine a phase difference between injected electrical current and received electrical current. A first bucker amplifier is coupled to the first measurement electrode and configured to apply a voltage to the first measurement electrode based on the determined phase difference in order for a phase of current received by the first measurement electrode to be substantially in phase with the current injected by the first transmitter electrode.

    摘要翻译： 公开了一种用于估计钻孔穿透的地层的性质的装置。 该装置包括：载体，被构造成通过钻孔传送，并具有配置成将电流注入到地层中的第一发射器电极;以及第一测量电极，其被配置为接收由于电流注入而进行测量的电流，以便估计 地球形成。 控制器被配置为确定注入的电流和接收的电流之间的相位差。 第一压差放大器耦合到第一测量电极，并且被配置为基于所确定的相位差向第一测量电极施加电压，以使由第一测量电极接收的电流的相位与注入的电流基本相同 由第一发射机电极。