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公开(公告)号：US5038107A
公开(公告)日：1991-08-06
申请号：US454605
申请日：1989-12-21
IPC分类号： G01V3/28
CPC分类号： G01V3/28
摘要： High resolution induction logs (28) are obtained through borehole casing (15) by magnetically saturating the casing (15), logging with a tool (10) having different transmitter (35a, 35b)-to-receiver (40) coil spacings, and determining the formation (30) conductivities as a function of the coil spacings, coil frequency, and phase difference between the signals at these spacings. The logging is preferably done at an intermediate frequency which gives good resolution but is little affected by the saturated casing.
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公开(公告)号：US5045795A
公开(公告)日：1991-09-03
申请号：US550842
申请日：1990-07-10
IPC分类号： G01V3/28
CPC分类号： G01V3/28
摘要： A coil array which is installed on a MWD drill collar for use in a resistivity logging system. The drill collar is provided with upper and lower coil support rings. These are toroids which support individual coil segments, and are connected by suitable magnetic shorting bars. The coil segments and shorting bars inscribe a specified solid angle or azimuthal extent. By connecting the outputs of the several coils through a combining circuit, the coils on a single coil form can be connected in series additive, or subtractive relationship. Through the use of two such coil forms with aligned coils on each, an azimuthally oriented window is thereby defined. By proper switching multiple azimuthally oriented windows can be made operative so that there is an azimuthal orientation to the current flow pattern relative to the MWD resistivity logging tool.
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公开(公告)号：US5191290A
公开(公告)日：1993-03-02
申请号：US604302
申请日：1990-10-29
IPC分类号： G01V3/20
CPC分类号： G01V3/20
摘要： A logging apparatus for measurement of earth formation resistivity is disclosed. The apparatus includes an elongated sonde having an insulated section and an electrically isolated conductive pad mounted for lateral extension into contact with a borehole wall. The electrically isolated conductive pad includes a plurality of current electrodes disposed longitudinally along the pad and a return electrode disposed on the reverse face thereof. A focussing section is utilized to provide varying depths of investigation by electrode current to preferably permit measurement of earth formation resistivity in the mudcake, flush zone, and uninvaded formation. In a preferred embodiment of the present invention, the conductive pad includes a pair of hingeably mounted sections which permit the apparatus to accommodate varying radii of curvature of boreholes.
摘要翻译： 公开了一种用于测量地层电阻率的测井装置。 该装置包括具有绝缘部分的细长探空器和安装用于横向延伸以与钻孔壁接触的电隔离导电垫。 电绝缘导电焊盘包括沿焊盘纵向设置的多个电流电极和设置在其反面上的返回电极。 利用聚焦部分通过电极电流提供不同的调查深度，以优选地允许测量泥饼，冲洗区和非浸入式地层中的地层电阻率。 在本发明的优选实施例中，导电垫包括一对可铰接地安装的部分，其允许该装置适应钻孔的变化的曲率半径。
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4.发明授权Method for improving the accuracy of dip determination using adjustable high pass filters 失效使用可调式高通滤波器提高浸渍测定精度的方法
公开(公告)号：US5239267A
公开(公告)日：1993-08-24
申请号：US700275
申请日：1991-05-15
申请人： Roland E. Chemali , Shey-Min Su , Joseph F. Goetz
发明人： Roland E. Chemali , Shey-Min Su , Joseph F. Goetz
IPC分类号： G01V3/24
CPC分类号： G01V3/24
摘要： The present system is directed to an improved dipmeter system including plural sensors on isolated pads around a sonde. An independent output is formed from each of the sensor pads, and each output is provided to its own adjustable high pass filter. The several high pass filters delete low frequency constituents in the sensor signals. Then, the signals are provided to a dipmeter computer to determine depth with greater accuracy. As a variation, the high pass filters can be selectively adjusted to provide an adjustable frequency for the filters, and one version utilizes the derivative of the dipmeter signal as a function of velocity or time.
摘要翻译： 本系统涉及一种改进的测角仪系统，包括围绕探空仪的隔离垫上的多个传感器。 从每个传感器焊盘形成独立的输出，并且将每个输出提供给其自己的可调高通滤波器。 几个高通滤波器删除传感器信号中的低频成分。 然后，将这些信号提供给一个测量计计算机以更精确地确定深度。 作为变化，可以选择性地调节高通滤波器以为滤波器提供可调频率，并且一个版本利用二次电平信号的导数作为速度或时间的函数。
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5.发明授权Logging while drilling apparatus with multiple depth of resistivity investigation 失效采用多层深度电阻率测井的钻井设备进行测井
公开(公告)号：US5428293A
公开(公告)日：1995-06-27
申请号：US149023
申请日：1993-11-08
申请人： Paul L. Sinclair , Shey-Min Su , Roland E. Chemali
发明人： Paul L. Sinclair , Shey-Min Su , Roland E. Chemali
CPC分类号： G01V3/28
摘要： In an MWD system, a mandrel for connection to the drill bit is set forth which supports shallow, intermediate and deep measuring resistivity systems. By transmitting upwardly and downwardly in alternate fashion, and receiving the transmitted signal at pairs of receiver coils, transmitted signal phase shift and attenuation are measured. A method of measuring is set forth which includes making resistivity measurements close to the drill bit at increasing ranges from the borehole so that formation resistivity prior to fluid invasion is obtained. Measurements are thus provided of formation resistivity before, during and after fluid invasion. The method also accommodates formations which have a relative dip angle with respect to the well borehole.
摘要翻译： 在MWD系统中，提出了用于连接到钻头的心轴，其支撑浅的，中间的和深的测量电阻率系统。 通过以交替方式向上和向下传播，并且在接收器线圈对接收传输的信号，测量发射信号相移和衰减。 提出了一种测量方法，其包括在距钻孔增加的范围内使电阻率测量值靠近钻头，从而获得在流体侵入之前的地层电阻率。 因此，在流体入侵之前，期间和之后提供测量结果。 该方法还适应于相对于井眼具有相对倾角的地层。
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6.发明授权Method and apparatus for eliminating drill effect in pulse induction measurements 有权消除脉冲感应测量中钻头效应的方法和装置公开(公告)号：US08332152B2
公开(公告)日：2012-12-11
申请号：US12077338
申请日：2008-03-19
CPC分类号： G01V3/28
摘要： A method and apparatus provide a time-dependent calibration to essentially eliminate pipe effect in pulse-induction logging while drilling. Use of two receivers to provide calibration and measurement information allows determination of formation properties in a downhole environment while eliminating the effect of tool effects.
摘要翻译： 一种方法和装置提供时间依赖性校准，以在钻孔时基本上消除脉冲诱导测井中的管道效应。 使用两个接收器提供校准和测量信息可以在井下环境中确定地层特性，同时消除工具效应的影响。
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公开(公告)号：US20100312477A1
公开(公告)日：2010-12-09
申请号：US12740262
申请日：2008-08-21
CPC分类号： G01V11/00
摘要： Disclosed systems and methods provide automated log quality monitoring, thereby enabling fast, on-site determination of log quality by logging engineers as well as re-assurance to interpreters faced with geologically-improbable features in the logs. Such uses can provide early detection of logging issues, increase confidence in acquired logs, reduce unnecessary duplication of effort, and improve the reputation of the logging company. In at least some embodiments, log monitoring software applies a comparison function to axially-spaced (and/or azimuthally-spaced) sensors. The comparison function can be, inter alia, cross-correlation, mutual information, mean-square error, and ratio image uniformity, each of which can be determined as a function of a sliding window position to indicate regions wherein the log quality falls below a threshold value. It is not necessary for the log sensors to be of the same type, e.g., resistivity image sensors.
摘要翻译： 公开的系统和方法提供自动日志质量监控，从而通过记录工程师快速现场确定日志质量，并重新确认面临日志中地质不可能特征的口译员。 这种用途可以提前检测日志记录问题，提高对采集日志的信心，减少不必要的重复工作量，提高采伐公司的声誉。 在至少一些实施例中，日志监视软件将比较功能应用于轴向间隔（和/或方位角间隔）的传感器。 比较功能可以是互相关，互信息，均方误差和比例图像均匀性，其中每个可以被确定为滑动窗口位置的函数，以指示其中对数质量低于 阈值。 对数传感器不必是相同的类型，例如电阻率图像传感器。
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公开(公告)号：US5446654A
公开(公告)日：1995-08-29
申请号：US914076
申请日：1992-07-16
申请人： Roland E. Chemali , David O. Torres
发明人： Roland E. Chemali , David O. Torres
摘要： In a resistivity log, a curve is obtained showing the values of resistivity where adjacent beds impact the measured resistivity. The curve as a function of well depth is first converted into a rectangularized curve so that the interfaces of the adjacent strata are located, and by a suitable number of iterations, a correction factor is applied. The corrected rectangular log is obtained with a correction coefficient computed at each depth. For each computation, the impact of all the strata within a specified depth window is considered, while strata beyond that window are simplified by representing the strata beyond the window with single equivalent bed values to reduce the number of computations required. This then provides a resistivity log which is substantially free of shoulder bed effect.
摘要翻译： 在电阻率测井中，获得曲线，表示相邻的床撞击测得的电阻率的电阻率值。 作为井深的函数的曲线首先被转换为矩形曲线，使得相邻层的界面位于，并且通过适当数量的迭代应用校正因子。 使用在每个深度处计算的校正系数获得校正的矩形日志。 对于每个计算，考虑在指定深度窗口内的所有层的影响，而通过用单个等效床值表示超过窗口的层来简化超过该窗口的层，以减少所需的计算次数。 然后提供基本上没有肩峰效应的电阻率测井。
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公开(公告)号：US10353111B2
公开(公告)日：2019-07-16
申请号：US12740262
申请日：2008-08-21
IPC分类号： G01V11/00
摘要： Disclosed systems and methods provide automated log quality monitoring, thereby enabling fast, on-site determination of log quality by logging engineers as well as re-assurance to interpreters faced with geologically-improbable features in the logs. Such uses can provide early detection of logging issues, increase confidence in acquired logs, reduce unnecessary duplication of effort, and improve the reputation of the logging company. In at least some embodiments, log monitoring software applies a comparison function to axially-spaced (and/or azimuthally-spaced) sensors. The comparison function can be, inter alia, cross-correlation, mutual information, mean-square error, and ratio image uniformity, each of which can be determined as a function of a sliding window position to indicate regions wherein the log quality falls below a threshold value. It is not necessary for the log sensors to be of the same type, e.g., resistivity image sensors.
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公开(公告)号：US09765609B2
公开(公告)日：2017-09-19
申请号：US13391419
申请日：2010-09-24
申请人： Roland E. Chemali , Ron Dirksen
发明人： Roland E. Chemali , Ron Dirksen
CPC分类号： E21B47/0002
摘要： A disclosed downhole optical imaging tool includes a light source and a camera enclosed within a tool body having at least two sidewall windows. A first window transmits light from the light source to a target region in the borehole, while a second window passes reflected light from the target region to the internal camera. The target region is spaced along the borehole away from the second window in a direction opposite the first window. In some embodiments, this configuration is provided by angling the first and second windows with respect to the sidewall, or by shaping the windows to cast and receive light from a “forward” direction. Some tool embodiments include motion and/or orientation sensors that are employed by a processor to combine separately captured images into a panoramic borehole image. It can be employed during drilling operations employing air or a substantially transparent liquid as a drilling fluid.
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