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Array processing-a new method to detect and correct errors on array resistivity logging tool measurements
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Taking advantage of these consistencies, an innovative method is developed to detect and correct errors in the array resistivity logging tool raw measurements, and evaluate the quality of the data.
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This configuration, which is a realistic idealization of an acoustic logging tool suspended in a fluid-filled borehole within a permeable surrounding formation, is of practical importance with a multitude of possible applications in seismo-acoustics.
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We compute the experimental semi-variogram and upscale its range and sill to larger (several inches) scales of measurement to predict the impact of heterogeneity on conventional core plug and logging tool porosity measurements.
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(3) Under quasi-in-situ (downhole) conditions, the azimuthal dependence of resistivity has been measured in horizontal planes using the Azimuthal Resistivity Imager (ARI), a down hole logging tool.
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Nitrogen dioxide was measured with passive diffusive samplers and particles with Data-RAM, a logging instrument using nephelometric monitoring.
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A more sophisticated application is to exploit the key-logging instrument in order to test basic assumptions of contemporary theories of spelling.
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The layout of the down-hole logging instrument and the structure of the IS-48, an instrument that maintains serial signal sampling, are considered.
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Multipole array sonic logging tools have widely been employed in Chinese oilfields in recent years.
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Multi-array logging tools acquire several times more individual measurements than conventional logging tools.
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The method can be applied to all array type logging tools, such as array induction tool and array resistivity tool.
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MBq, which is three orders of magnitudes less than the source activities applied in standard commercial beforehole logging tools.
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The logging tools enable developers to instrument C or C++ programs so that data indicating state changes can be logged automatically in a variety of formats.
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| | The diplog tool (1016 type) has been imported recently and put into application in many oilfields. The SHDT(Schlumberger)which has, more or less, similar characteristics and functions, is in wide use over our country. Compared with the earlier types, these tools are improved in data acquisition and measurement accuracy. A new inclinometer system of three-dimensional accelerometer and three-vector magnetometer ensures a high accuracy of orientation measurement and implementation of speed correction for corre... | | 国内不少油田引进了阿特拉斯公司1016型地层倾角测井仪,而具有类似功能的斯仓贝谢公司SHDT仪器也曾在我国部分油田服务。这些新型的倾角测井仪器较之各自的前代型号在功能及测量精度等方面有较大改善,特别是由于应用了新的测斜系统——三维加速度计和三维磁力计,从而提高了方位、倾斜数据的计算精度,增加了对倾角测井对比曲线进行速度校正的手段。本文阐述了新测斜系统的方位和倾斜数据计算方法,并讨论了利用加速度计测量数据进行速度校正的方法,以及将该速度校正方法推广应用于其他测井的可能性。 | | 文摘来源 | | When a point current source is located at any position in a borehole,two-region.boundary problem of solving for Poisson's equation in the borehole and the forma tion can be changed into three-region boundary problem of solving for Laplace equa tion in the cylinder whose radius is smaller than the distance between source and borehole axis,in the hollow cylinder between source and well wall,and in the for mation. The contribution of current source is embodied on the boundary condition of cylindrical surface ... | | 点电流源位于井内任意一点时，将在井眼、地层两个区域中求解泊松方程的边值问题化为在半径小于源到井轻距离的圆柱、源到井壁间的圆筒以及地层三个区域中求解拉普拉斯方程的边值问题。电流源的贡献则体现在源所在柱面的边界条件上，由此得到电位的偏心格林函数。水平井中偏心双侧向测井仪器在井内产生的电位可由偏心格林函数沿电极系积分得到，从而求得视电阻率响应。通过数值计算，绘制了深、浅侧向的偏心井眼校正图板。 | | 文摘来源 | | his paper briefs the basic parameters selection for sonic Logging tool such as distancebetween transmitter and receiver Ls,specing LR,logging speed VL and transmitter repetitionfrequency fT, and concentrates on the restrictive factors for thin bed resolution, survey precision and the sampling theorem of the tool. The quantitative relation for selecting the basicparameters in the design of the tool is derived. | | 郑勇，钟振伟，刘嗣贤，薛晓书．声波测井仪器基本参数选择．测井技术，ｌ９９４４，１８（ｌ）：１６～２ｌ简述了声波测井仪器的基本参数，如源距Ｌｓ、间距ＬＲ、仪器测速ＶＬ和声波间隙发射频率ｆｒ等。重点分析仪器的薄层分辨能力、测量精度和采样定理等制约因素，导出声速测井仪器设计中基本参数选择的定量关系式． | | 文摘来源 | | | | << 更多相关文摘 |
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测井仪器
logging tool
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