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标题翻译：用于多分量感应仪器测量系统的方法和装置，用于在水平，垂直和偏移的井中形成电阻率数据解释

公开(公告)号：WO2003025342A2

公开(公告)日：2003-03-27

申请号：PCT/US2002/024781

申请日：2002-08-05

申请人： BAKER HUGHES INCORPORATED

发明人： FANINI, Otto , FORGANG, Stanislav, W. , MERCHANT, Gulamabbas, A. , KRIEGSHAUSER, Berthold , YU, Liming

IPC分类号： E21B47/00

CPC分类号： G01V3/28

摘要： An improved induction tool for formation resistivity evaluations. The tool provides electromagnetic transmitters and sensors suitable fior transmitting and receiving magnetic fiels in radial directions that are orthogonal to the tool's longitudinal axis with minimal susceptibility to errors associated with parasitic eddy currents induced in the metal components surrounding the transmitter and receiver coils. The present invention provides increased effective tool surface impedance by increasing self-inductance of the paths in which induced eddy currents flow on the surface of the multi-component induction instruments. The tool enables downhole tool designers to build more effective and better-protected radial induction arrays for existing and future downhole instruments operating in the frequency and/or time domains. In this case the array measurements results contain information primarily about the formation's vertical resistivity. The tool makes its possible to combine radial arrays with coaxial arrays that conventianally measure horizontal formation resistivity. This combination enables obtaining a full resistivity tensor to evaluate formation anisotropy. The tool provides a composite non-conductive housing to reduce or even avoid them effects of parasitic eddy currents flowing on the tool surface. The tool provides a non-magnetic housing that is conductive which reduces the effects of conductive materials near coils and, primarily, the receiver. The tool provides a non-conductive coating is placed over the housing to prevent high frequency eddy currents from leaking from the housing in the conductive mud of the adjacent welbore and returning to the housing. The tool method uses measurements for geo-steering applications in vertical, horizontal and deviated well bores. Measurements are taken of time domain response into frequency domain and select a spectrum of interest. The tool provides a tuned, broadband or retunable coil and tuned, broadband or retunable source. The tool also provides a multi-layer flexible circuit board containing at least one of a coil, a selectable shield, a magnatic layer and tunable components. The tool also enables dual compensated measurement of array to improve signal to noise ratio and measurement stability to improve signal content with reservoir,geological and geophysical. The tool utilizes methods for application for geo-steering, drilling assistance and decisions. The tool provides a transverse magnetic path and in general any magnetic path combination which occurs in traverse plane perpendicular to the tool longitudinal axis. The tool method utilizes multiple frequency sequential or simultaneous measurements. The tool method utilizes measurements of an aaray combined with gyro, accelerometer, magnetometer and inclinometer data at same time. Various transmitter receiver combinations are provided to select sensitivity to a desired reservoir formation properties, for example, different orientation xy, xz, yz, 20-40, 20-90, and combinations, such as Symmetric-symmetric; Asymmetric-symmetric; and Asymmetric-asymmetric. Measurements made with a multi- component logging instrument when used in a substantially horizontal, vertical or deviated borehole in earth formations are diagnostic of the direction of resistive beds relative to the position of the borehole.

摘要翻译：改进的地层电阻率评估感应工具。该工具提供电磁发射器和传感器，其适用于在径向方向上发射和接收磁场的电磁发射器和传感器，其垂直于工具的纵向轴线，对与在发射器和接收器线圈周围的金属部件中感应的寄生涡流有关的误差的影响最小。本发明通过增加感应涡流在多部件感应仪器的表面上流动的路径的自感来提供增加的有效工具表面阻抗。该工具使井下工具设计人员能够为在频率和/或时域工作的现有和未来的井下仪器构建更有效和更好保护的径向感应阵列。在这种情况下，阵列测量结果包含主要关于地层垂直电阻率的信息。该工具可以将径向阵列与同轴阵列结合在一起，这意味着测量水平地层电阻率。这种组合使得能够获得全电阻率张量以评估地层各向异性。该工具提供复合非导电外壳，以减少甚至避免它们在工具表面上流动的寄生涡流的影响。该工具提供导电的非磁性壳体，其减少了线圈附近的导电材料和主要是接收器的影响。该工具提供了非导电涂层放置在壳体上以防止高频涡流从相邻韦尔布尔的导电泥浆中的壳体泄漏并返回到壳体。工具方法使用垂直，水平和偏斜井眼中的地理转向应用的测量。对时域响应进行频域测量，并选择感兴趣的频谱。该工具提供一个调谐，宽带或可重复的线圈和调谐，宽带或可重复的来源。该工具还提供了包含线圈，可选屏蔽，电位层和可调组件中的至少一个的多层柔性电路板。该工具还支持阵列的双重补偿测量，以提高信噪比和测量稳定性，以改善储层，地质和地球物理学的信号含量。该工具利用地理转向，钻井辅助和决策应用的方法。该工具提供横向磁路，并且通常在垂直于工具纵向轴线的横动平面中发生任何磁路组合。该工具方法利用多次频率顺序或同时测量。该工具方法同时使用与陀螺仪，加速度计，磁力计和倾斜仪数据相结合的aaray测量。提供各种发射器接收器组合以选择对期望的储层形成性质的灵敏度，例如不同的取向xy，xz，yz，20-40,20-90以及诸如对称对称的组合; 非对称对称; 和非对称不对称。使用多组分测井仪器进行测量，当用于地球上基本水平，垂直或偏斜的井眼时

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