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过套管电阻率测井仪能在金属套管井中测量地层的电阻率,在油气勘探和开发中具有重要的应用,但对厚度小于仪器电极距的薄目的层进行测量时,将受到上下围岩的影响.而我国许多油气储集层的厚度较薄(厚度小于1 m),严重影响了这种测井新技术的地质应用效果.双极供电型过套管电阻率测井仪在国内使用广泛,针对这类仪器,利用修正的传输线理论,采用数值模拟方法,全面分析了地层厚度和电阻率对测量值的影响.为电极距分别为1.0 m和1.1 m的双极供电型过套管电阻率测井仪建立了一套完善的薄层校正图版.编制了相应的计算机处理程序,挂接到常用的测井资料处理与解释平台上,可自动查找所建立的校正图版,方便、快捷地进行薄层校正.油田实际测井资料处理结果表明该方法可行、有效.
Cased-hole resistivity tools can measure the resistivity of formations in metal cased wells and have important applications in oil and gas exploration and development. However, when measuring thin layers less than the electrode distance of the instrument, However, the thickness of many oil and gas reservoirs in China is very thin (less than 1 m in thickness), which seriously affects the geological application of this new logging technology. Bipolar power over-cased resistivity logging tools are widely used in China Widely used, for this type of instrument, the effects of formation thickness and resistivity on the measured values are comprehensively analyzed by using the modified transmission line theory and the numerical simulation method, and are bipolar power supply oversized sleeves with electrode distances of 1.0 m and 1.1 m, respectively The tube resistivity tool sets up a complete set of thin-layer calibration plates, and compiles the corresponding computer processing program, which is linked to the commonly used logging data processing and interpretation platform, and can automatically find the calibration plate set up to facilitate, The thin-layer calibration is quick and easy.The actual logging data processing results show that this method is feasible and effective.