利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

59 条记录 (耗时 0.024 秒)

    METHOD FOR ACCENTUATING SIGNAL FROM AHEAD OF THE BIT
    3.
    发明申请
    METHOD FOR ACCENTUATING SIGNAL FROM AHEAD OF THE BIT 审中-公开
    从位的前端识别信号的方法

    公开(公告)号：US20100213943A1

    公开(公告)日：2010-08-26

    申请号：US12710438

    申请日：2010-02-23

    申请人： Daniel T. Georgi ,  Gregory B. Itskovich ,  Michael B. Rabinovich ,  Leonty A. Tabarovsky

    发明人： Daniel T. Georgi ,  Gregory B. Itskovich ,  Michael B. Rabinovich ,  Leonty A. Tabarovsky

    IPC分类号： G01V3/18

    CPC分类号： G01V3/28 ,  G01V11/00 ,  G01V2210/6163 ,  G01V2210/6167

    摘要： A method for estimating a property of a portion of an earth formation ahead of a borehole penetrating the formation, the method includes: conveying a logging tool through the borehole; receiving one or more first signals from a previous depth of the logging tool; constructing a model of the earth formation using the one or more first signals; predicting one or more second signals from the portion of the earth formation ahead of the borehole using the model; receiving one or more third signals from the portion of the earth formation ahead of the borehole; calculating a difference between the one or more third signals and the one or more second signals; and estimating the property from the difference.

    摘要翻译： 一种用于估计穿过地层的井眼之前的地层的一部分的性质的方法，所述方法包括：将测井工具传送通过所述钻孔; 从测井工具的先前深度接收一个或多个第一信号; 使用所述一个或多个第一信号构造地层的模型; 使用该模型预测来自钻孔前方的地层部分的一个或多个第二信号; 从钻孔前面的地层部分接收一个或多个第三信号; 计算所述一个或多个第三信号与所述一个或多个第二信号之间的差; 并从差异估算属性。

    Method and apparatus for resistivity imaging in boreholes with an antenna and two spaced apart electrodes
    4.
    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。

    Radial sounding electrical well logging instrument
    6.
    发明授权
    Radial sounding electrical well logging instrument 失效
    径向探测电测井仪

    公开(公告)号：US6060886A

    公开(公告)日：2000-05-09

    申请号：US7159

    申请日：1998-01-14

    申请人： Leonty A. Tabarovsky ,  Antonio Fabris ,  Alberto G. Mezzatesta ,  Gregory B. Itskovich

    发明人： Leonty A. Tabarovsky ,  Antonio Fabris ,  Alberto G. Mezzatesta ,  Gregory B. Itskovich

    IPC分类号： G01V3/24 ,  G01V3/18

    CPC分类号： G01V3/24

    摘要： An apparatus for determining radial distribution of resistivity of earth formations surrounding a wellbore. The apparatus includes a sonde mandrel having an insulating exterior surface and electrodes disposed on the insulating surface at spaced apart locations. The electrodes are connected to circuits for measuring a focused current resistivity within a predetermined longitudinal span. The electrodes are also connected to circuits for measuring electrical impedance between pairs of electrodes spaced apart at a plurality of different longitudinal spacings. The preferred embodiment includes a voltage measuring circuit interconnected between a pair of electrodes which is positioned between a closest spaced pair of electrodes connected to the impedance measuring circuits, so that a vertical resolution of the impedance measurements can be limited to approximately the axial spacing of the pair of electrodes connected to the voltage measuring circuit. A method according to the invention for determining the distribution of resistivity of earth formations surrounding a wellbore includes the steps of measuring a focused current resistivity of the earth formations to determine a composite resistivity of an uninvaded zone, an invaded zone and a flushed zone. Impedance is measured between pairs of electrodes, each pair having a different longitudinal spacing, and resistivity of the flushed zone and the invaded zone are determined from the measurements of impedance. The resistivity of the uninvaded zone can then be determined from the measurement of focused current resistivity.

    摘要翻译： 一种用于确定井筒周围的地层的电阻率的径向分布的装置。 该设备包括具有绝缘外表面的探头心轴和在间隔开的位置处设置在绝缘表面上的电极。 电极连接到用于测量预定纵向跨度内的聚焦电流电阻率的电路。 电极还连接到用于测量以多个不同纵向间隔间隔开的电极对之间的电阻抗的电路。 优选实施例包括互连在一对电极之间的电压测量电路，该对电极位于连接到阻抗测量电路的最近间隔的一对电极之间，使得阻抗测量的垂直分辨率可以被限制在近似于 一对电极连接到电压测量电路。 根据本发明的用于确定围绕井筒的地层的电阻率分布的方法包括以下步骤：测量地层的聚焦电流电阻率以确定未浸没区域，入侵区域和冲洗区域的复合电阻率。 电阻对之间测量阻抗，每对电极具有不同的纵向间隔，并且从阻抗的测量值确定冲洗区域和入侵区域的电阻率。 然后可以从聚焦电流电阻率的测量来确定非浸没区域的电阻率。

    Method for simultaneous inversion processing of well log data using a plurality of earth models
    9.
    发明授权
    Method for simultaneous inversion processing of well log data using a plurality of earth models 失效
    使用多个地球模型同步反演处理测井数据的方法

    公开(公告)号：US5878372A

    公开(公告)日：1999-03-02

    申请号：US811523

    申请日：1997-03-04

    申请人： Leonty A. Tabarovsky ,  Michael B. Rabinovich

    发明人： Leonty A. Tabarovsky ,  Michael B. Rabinovich

    IPC分类号： G06F17/12 ,  G06F19/00

    CPC分类号： G06F17/12

    摘要： A method of determining a plurality of formation models each of which will simulate the response of a well logging instrument. A measured response of the well logging instrument is used to generate an initial model using inversion processing. A response of the instrument to the initial model is synthesized. A singular value decomposition is performed on the synthetic response to generate eigenparameters of the initial model. Eigenparameters having the least significant overall contribution to the synthetic response are sequentially substituted with linear equations representing prior constraints on the initial earth model. A linear system, including the remaining ones of the eigenparameters and the linear equations is solved so that the eigenparameters are preserved exactly and the linear equations satisfy a least squares fit. An additional synthetic instrument response is generated for each solution to the linear system which falls below a predetermined error threshold. The additional instrument responses are compared with the synthesized response to the initial model. The one of the solutions to the linear system which represents an earth model providing minimum misfit with respect to equations representing the prior constraints is selected as the best fit model.

    摘要翻译： 一种确定多个地层模型的方法，每个地层模型都将模拟测井仪器的响应。 使用测井仪器的测量响应来生成使用反演处理的初始模型。 合成仪器对初始模型的响应。 对合成响应执行奇异值分解以产生初始模型的特征参数。 具有对合成响应的最小有效总体贡献的特征参数被顺序地替换为表示在初始地球模型上的先前约束的线性方程式。 解决包括本征参数和线性方程中的其余线性系统的线性系统，使得本征参数被精确地保留，并且线性方程式满足最小二乘拟合。 对于低于预定误差阈值的线性系统的每个解决方案产生另外的合成仪器响应。 将额外的仪器响应与对初始模型的合成响应进行比较。 线性系统的解决方案之一是代表提供关于代表先前约束的方程的最小失配的地球模型，被选为最佳拟合模型。