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本文介绍了一种相当于三芯电缆组合测井的随钻测量(LWD)技术,由两个既可单独又可组合使用的部分组成,即电阻率和中子源。设计中增加了一些新特点以处理过去遇到的一些问题,并有效地提供接近电缆测井的质量。电阻率测量同时对两个不同传感器相位和阻尼电阻率进行对称测量,可得到确定Rt和量化挠动的足够记录。对称设计提供了钻孔补偿,并确保所有记录对实测点均相同。核测井仪测量了密度、光电系数Pe,中子孔隙度、间隙和钻孔直径(孔径)。通过对优于大间隙加权的小间隙数据加权的方法改善核测井质量,也可用间隙和井径修正中子孔隙度。
This article describes a LWD measurement equivalent to a three-core cable combination logging, consisting of two parts that can be used individually or in combination: resistivity and neutron source. Some new features have been added to the design to address some of the problems encountered in the past and to provide effective access to the quality of cable logs. Resistivity Measurement Simultaneous measurement of the phase and damping resistivities of two different sensors simultaneously gives sufficient recording to determine Rt and quantify the deflection. Symmetrical design provides borehole compensation and ensures that all records are the same for the measured points. Nuclear logging tool measured the density, photoelectric coefficient Pe, neutron porosity, clearance and hole diameter (aperture). The quality of nuclear logs can be improved by weighting the small gap data that is better than the large gap weight, and the neutron porosity can also be corrected with gaps and caliper.