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41. 发明授权

US5900733A Well logging method and apparatus for determining downhole Borehole fluid resistivity, borehole diameter, and borehole corrected formation resistivity 失效
标题翻译：测井方法和装置，用于确定井下井眼流体电阻率，井眼直径和钻孔校正地层电阻率
公开(公告)号：US5900733A
公开(公告)日：1999-05-04
申请号：US789902
申请日：1997-01-29
申请人： Peter T. Wu , Jacques R. Tabanou
发明人： Peter T. Wu , Jacques R. Tabanou
IPC分类号： G01V3/30 , G01V3/08 , G01V3/10
CPC分类号： G01V3/30
摘要： A well logging method and apparatus are disclosed for determining borehole corrected formation resistivity, borehole diameter, and downhole borehole fluid (mud) resistivity with improved accuracy. A logging device in the borehole transmits electromagnetic energy from a transmitter, which energy is received at receivers on the logging device. The phase and amplitude of the received energy are measured at the receivers and a phase shift, phase average, and attenuation are associated with the transmitter-to-receivers spacing. The process is then repeated for a plurality of further transmitters having different spacings from the receivers. A formation and borehole model having model values of borehole corrected formation resistivity, borehole diameter, and borehole fluid resistivity is generated. Values of borehole corrected formation resistivity, borehole diameter, and borehole fluid resistivity that would produce a model phase shift, phase average and attenuation corresponding to the measured values of these parameters are then determined.
摘要翻译：公开了一种测井方法和装置，用于确定井眼校正地层电阻率，钻孔直径和井下井眼流体（泥浆）电阻率并提高精度。钻孔中的测井装置从发射器发射电磁能，该能量在测井装置的接收器处被接收。在接收机处测量接收能量的相位和幅度，并且相移，相位平均和衰减与发射机到接收机的间隔相关联。然后对于与接收器具有不同间隔的多个另外的发射器重复该过程。产生具有钻孔校正地层电阻率，井眼直径和井眼流体电阻率的模型值的地层和井眼模型。然后确定将产生对应于这些参数的测量值的模型相移，相位平均和衰减的钻孔校正地层电阻率，井眼直径和钻孔流体电阻率的值。

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