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51. 发明授权

US06541979B2 Multi-coil electromagnetic focusing methods and apparatus to reduce borehole eccentricity effects 失效
公开(公告)号：US06541979B2
公开(公告)日：2003-04-01
申请号：US09741593
申请日：2000-12-19
申请人： Dzevat Omeragic
发明人： Dzevat Omeragic
IPC分类号： G01V318
CPC分类号： G01V3/28
摘要： Methods and apparatus are disclosed for canceling or eliminating borehole eccentricity effects on a formation resistivity measurement obtained with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Various apparatus are configured with a plurality of antennas having tilted or transverse magnetic dipole moments, at least one current sensor, means for conducting alternating current through one or more of the antennas, and means for calculating a scaling factor from signal measurements and for scaling the alternating current with the factor. One method includes scaling an alternating current and passing said current through one or more antennas to obtain the resistivity measurement. Another method includes calculating scaling factors based on spacings between antennas and/or current sensors disposed on an instrument and passing alternating currents scaled by said factors through one or more antennas to obtain the resistivity measurement. Another embodiment includes inputting a borehole fluid resistivity value to derive the formation resistivity.

52. 发明申请

US20100082255A1 METHOD FOR BOREHOLE CORRECTION, FORMATION DIP AND AZIMUTH DETERMINATION AND RESISTIVITY DETERMINATION USING MULTIAXIAL INDUCTION MEASUREMENTS 有权
标题翻译：用于多孔感应测量的钻孔校正方法，形成DIP和AZIMUTH测定和电阻率测定
公开(公告)号：US20100082255A1
公开(公告)日：2010-04-01
申请号：US12241141
申请日：2008-09-30
申请人： Sofia Davydycheva , Dean Homan , Dzevat Omeragic
发明人： Sofia Davydycheva , Dean Homan , Dzevat Omeragic
IPC分类号： G01V3/38
CPC分类号： G01V3/28
摘要： A method for determining electromagnetic induction properties of subsurface rock formations includes determining an eccentering angle of a well logging instrument disposed in a wellbore. The instrument includes at least one triaxial induction transmitter and at least one triaxial induction receiver. The eccentering angle is determined from symmetric cross component measurement differences. The triaxial induction measurements made from the at least one receiver are rotated to an apparent eccentering angle of zero. At least one electromagnetic induction property is determined from the rotated triaxial induction measurements.
摘要翻译：用于确定地下岩层的电磁感应特性的方法包括确定设置在井眼中的测井仪器的偏心角度。仪器包括至少一个三轴感应发射器和至少一个三轴感应接收器。偏心角由对称交叉分量测量差异确定。由至少一个接收器进行的三轴感应测量旋转到零的中心角。从旋转的三轴感应测量确定至少一个电磁感应特性。

53. 发明授权

US07366616B2 Computer-based method for while-drilling modeling and visualization of layered subterranean earth formations 有权
标题翻译：基于计算机的分层地下地层地层建模与可视化的方法
公开(公告)号：US07366616B2
公开(公告)日：2008-04-29
申请号：US11332736
申请日：2006-01-13
申请人： Nicholas Bennett , Richard T. Coates , Alberto Malinverno , Dzevat Omeragic
发明人： Nicholas Bennett , Richard T. Coates , Alberto Malinverno , Dzevat Omeragic
IPC分类号： G01V3/20 , G01V3/38
CPC分类号： E21B49/00 , G01V3/38
摘要： A computer-based method is provided for modeling and visualizing a property of a subterranean earth formation while drilling a borehole therethrough. The computer-based method gathers electromagnetic signals corresponding to a current measurement station location of a measurement-while-drilling tool, and generates a multilayer model corresponding to such electromagnetic signals. A histogram characterizing uncertainty of the multilayer model is used to generate a set of color hue values which represent predictions of the formation property for depth values above/below the tool, and a corresponding set of saturation values (which represent uncertainties for these predictions). A curtain plot is generated and displayed. The curtain plot employs colors to visualize formation property predictions for depth values above/below the tool over successive measurement station locations. A new column of the curtain plot is generated for the current measurement station location. The color values of the new column are based upon the set of color hue values and the set of saturation values derived from the histogram. The saturation levels of the new column represent uncertainties for the corresponding predictions.
摘要翻译：提供了一种基于计算机的方法，用于在钻孔通过其中的地下地层的性质的建模和可视化。基于计算机的方法收集对应于钻孔测量工具的当前测量站位置的电磁信号，并且生成对应于这种电磁信号的多层模型。表征多层模型的不确定性的直方图用于生成一组色调值，它们表示对于工具以上/下方的深度值的形成属性的预测，以及对应的一组饱和度值（这代表这些预测的不确定性）。生成并显示窗帘图。窗帘绘图使用颜色来显示在连续的测量站位置上的工具上方/下方的深度值的地层性质预测。为当前测量站位置生成一个新的窗帘图。新列的颜色值基于色彩值的集合和从直方图导出的饱和度集合。新列的饱和度水平表示相应预测的不确定性。

54. 发明授权

US07239145B2 Subsurface electromagnetic measurements using cross-magnetic dipoles 有权
标题翻译：使用交叉磁偶极子的地下电磁测量
公开(公告)号：US07239145B2
公开(公告)日：2007-07-03
申请号：US10812369
申请日：2004-03-29
申请人： Dean M. Homan , Dzevat Omeragic , Tianhua Zhang , Nicolas Sebline
发明人： Dean M. Homan , Dzevat Omeragic , Tianhua Zhang , Nicolas Sebline
IPC分类号： G01V3/18
CPC分类号： G01V3/30
摘要： Sensor assemblies including transmitter and receiver antennas to respectively transmit or receive electromagnetic energy. The sensor assemblies are disposed in downhole tools adapted for subsurface disposal. The receiver is disposed at a distance less than six inches (15 cm) from the transmitter on the sensor body. The sensor transmitter or receiver includes an antenna with its axis tilted with respect to the axis of the downhole tool. A sensor includes a tri-axial system of antennas. Another sensor includes a cross-dipole antenna system.
摘要翻译：传感器组件包括用于分别发送或接收电磁能的发射机和接收机天线。传感器组件设置在适于地下处置的井下工具中。接收器设置在距离传感器主体上的发射器小于6英寸（15厘米）的距离处。传感器发射器或接收器包括其轴线相对于井下工具的轴线倾斜的天线。传感器包括三轴天线系统。另一传感器包括一个交叉偶极天线系统。

55. 发明授权

US06927578B2 Detection of borehole currents due to a decentered transverse magnetic dipole transmitter 有权
标题翻译：检测由偏心横向磁偶极子发射器引起的井眼电流
公开(公告)号：US06927578B2
公开(公告)日：2005-08-09
申请号：US10248119
申请日：2002-12-19
申请人： Dean M. Homan , Dzevat Omeragic
发明人： Dean M. Homan , Dzevat Omeragic
IPC分类号： G01V3/28 , G01V3/18
CPC分类号： G01V3/28
摘要： The invention provides an apparatus for making an electromagnetic measurement from within a subsurface borehole. The apparatus comprises an elongated support having electrically conductive segments and adapted for disposal within the borehole; an antenna adapted to transmit electromagnetic energy disposed on the support such that its axis is tilted or perpendicular with respect to the axis of the support; a sensor disposed on the support and adapted to detect a current flow along the support when the antenna is activated to transmit electromagnetic energy; and means to process the detected current flow to provide an indication of the measurement quality or the position of the support within the borehole.
摘要翻译：本发明提供一种用于从地下钻孔内进行电磁测量的装置。该装置包括具有导电段并且适于在钻孔内处置的细长支撑件; 天线，其适于传输设置在所述支撑件上的电磁能量，使得其轴线相对于所述支撑件的轴线倾斜或垂直; 传感器，其设置在所述支撑件上并且适于在所述天线被激活以传送电磁能量时检测沿着所述支撑件的电流; 以及用于处理检测到的电流以提供测量质量或支撑件在钻孔内的位置的指示的装置。

56. 发明申请

US20050067190A1 Apparatus and methods for imaging wells drilled with oil-based muds 有权
标题翻译：用油基泥浆钻井成像井的装置和方法
公开(公告)号：US20050067190A1
公开(公告)日：2005-03-31
申请号：US10674179
申请日：2003-09-29
申请人： Jacques Tabanou , Dzevat Omeragic , Jean Seydoux , Attilio Pisoni
发明人： Jacques Tabanou , Dzevat Omeragic , Jean Seydoux , Attilio Pisoni
IPC分类号： G01V3/24 , E21B47/026
CPC分类号： G01V3/24
摘要： A resistivity logging sensor for logging while drilling a well using an oil-based mud includes a sensor body; a first current injector electrode disposed on the sensor body, wherein the first current injector electrode is electrically insulated from the sensor body; at least two current return electrodes disposed on the sensor body at a selected distance from the first current injector electrode, wherein the at least two current return electrodes are disposed proximate to each other and are electrically insulated from the sensor body; and an electrical source configured to energize the first current injector electrode with a current having a voltage of no less than 50 mvolts and a frequency of no less than 1 KHz.
摘要翻译：使用油基泥浆钻井时的测井电阻率测井传感器包括传感器体; 设置在所述传感器主体上的第一电流注入器电极，其中所述第一电流注入器电极与所述传感器主体电绝缘; 至少两个电流返回电极，其布置在距离第一电流注入器电极选定距离的传感器主体上，其中至少两个电流返回电极彼此靠近设置并且与传感器主体电绝缘; 以及电源，其被配置为用具有不小于50mV的电压和不小于1KHz的频率的电流来激励所述第一电流注入器电极。

57. 发明授权

US06819110B2 Electromagnetic resistivity logging instrument with transverse magnetic dipole component antennas providing axially extended response 有权
标题翻译：具有横向磁偶极子分量天线的电磁阻抗测井仪提供轴向延伸响应
公开(公告)号：US06819110B2
公开(公告)日：2004-11-16
申请号：US10108056
申请日：2002-03-26
申请人： Dzevat Omeragic , Cengiz Esmersoy
发明人： Dzevat Omeragic , Cengiz Esmersoy
IPC分类号： G01V308
CPC分类号： G01V3/28
摘要： An electromagnetic well logging instrument is disclosed which includes at least one transmitter antenna oriented to have at least some magnetic dipole moment component transverse to an axis of the instrument. The instrument includes at least two receiver antennas oriented to have at least some magnetic dipole moment component transverse to the axis and parallel to the magnetic dipole moment component of the at least one transmitter antenna. The at least two receiver antennas are axially spaced apart from the transmitter antenna so that a response of the instrument to the transverse magnetic dipole moment component is axially substantially on one side of a more distant spaced one of the at least two receiver antennas.
摘要翻译：公开了一种电磁测井仪器，其包括至少一个定向成具有横向于仪器的轴线的磁偶极矩分量的发射器天线。所述仪器包括至少两个接收器天线，所述至少两个接收器天线定向成具有横向于所述轴线并且平行于所述至少一个发射器天线的磁偶极矩分量的至少一些磁偶极矩分量。所述至少两个接收器天线与所述发射器天线轴向间隔开，使得所述仪器对所述横向磁偶极矩分量的响应轴向地基本上位于所述至少两个接收器天线之间更远距离的一个的一侧上。

58. 发明授权

US06566881B2 Shielding method and apparatus using transverse slots 有权
标题翻译：使用横槽的屏蔽方法和装置
公开(公告)号：US06566881B2
公开(公告)日：2003-05-20
申请号：US09746927
申请日：2000-12-22
申请人： Dzevat Omeragic , Jean Seydoux , Richard A. Rosthal
发明人： Dzevat Omeragic , Jean Seydoux , Richard A. Rosthal
IPC分类号： G01V330
CPC分类号： G01V3/28 , G01V3/30 , H01Q1/526 , H01Q7/00 , H01Q13/10 , H01Q17/001
摘要： A shielding method and apparatus for an antenna disposed on an elongated support adapted for disposal within a borehole. The shield providing predetermined attenuation of one or more electromagnetic energy field components as the field components interact with the shield. The shield composed of a flexible strip or cylindrical body and respectively comprising a transverse conductive element or a transverse slot therein. The shields being adapted to cover an antenna mounted on the support. The shields being compatible for use in conjunction with saddle, tilted coils or multi-layered tri-axial coils to produce a pure transverse magnetic dipole electromagnetic field. The shields are also used in methods for shielding an antenna disposed on a support to provide predetermined attenuation of an electromagnetic field component as the field components interact with the shield.
摘要翻译：一种用于天线的屏蔽方法和装置，其设置在适于在钻孔内处理的细长支撑件上。屏蔽层当场分量与屏蔽相互作用时提供一个或多个电磁能量场分量的预定衰减。该屏蔽由柔性条或圆柱体组成，分别包括横向导电元件或横向槽。屏蔽件适于覆盖安装在支撑件上的天线。该屏蔽件与鞍座，倾斜线圈或多层三轴线圈结合使用以产生纯横向磁偶极电磁场。屏蔽还用于屏蔽设置在支撑件上的天线的方法，以在场屏元件与屏蔽件相互作用时提供电磁场分量的预定衰减。

59. 发明授权

US06297639B1 Method and apparatus for directional well logging with a shield having sloped slots 有权
标题翻译：用于具有倾斜槽的屏蔽件进行定向测井的方法和装置
公开(公告)号：US06297639B1
公开(公告)日：2001-10-02
申请号：US09452576
申请日：1999-12-01
申请人： Brian Clark , Richard A. Rosthal , Dean M. Homan , Dzevat Omeragic , Stephen D. Bonner , Scott S. Chesser , Thomas D. Barber
发明人： Brian Clark , Richard A. Rosthal , Dean M. Homan , Dzevat Omeragic , Stephen D. Bonner , Scott S. Chesser , Thomas D. Barber
IPC分类号： G01V330
CPC分类号： G01V3/30
摘要： Methods and apparatus for making directional measurements of earth formations surrounding a borehole. New antenna coil shield designs are utilized to provide selective attenuation of at least one electromagnetic energy field component as the component interacts with the shield. The new shields are implemented in several downhole tool configurations to provide azimuthally focused formation measurements. In effect, the new shield filters interacting electromagnetic energy field components to pass those components corresponding to a magnetic dipole oriented at an angle from the tool axis. The shields thereby alter a coil's envelope of influence to electromagnetic energy. The new shields also form part of a system for making directional measurements while drilling.
摘要翻译：用于对钻孔周围的地层进行方向测量的方法和装置。新的天线线圈屏蔽设计被用于在组件与屏蔽件相互作用时提供至少一个电磁能量场分量的选择性衰减。新的防护罩在几个井下工具配置中实现，以提供方位角聚焦的地层测量。实际上，新的屏蔽滤波器与电磁能场分量相互作用以通过对应于与工具轴成一定角度取向的磁偶极子的那些部件。屏蔽因此改变了线圈对电磁能的影响。新的盾牌也构成了钻井时进行方向测量的系统的一部分。

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