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电成像测井能够直观地获取岩性、沉积以及裂缝等地质信息,在油田勘探开发中得到日益广泛应用.在油基泥浆环境中,电成像装置采用电容耦合原理把交变电流发射到地层中,测量各个钮扣电极的电流或者电位,可以得到钮扣的阻抗,把阻抗信号进行标定,获得反映地层特征的图像.本文提出了一种新成像处理方法,把测量的复数信号经过数据处理,不但能够获取地层电阻率图像,同时也能够获取地层的介电常教图像.运用该方法对地层模型进行了验证,与此同时对试验井测量资料进行成像处理,获得了清晰的电阻率图像和介电常数图像.
Electro-imaging logging can intuitively acquire geologic information such as lithology, sedimentary and fractures and is widely used in oilfield exploration and development.In the oil-based mud environment, the electro-imaging device uses the principle of capacitive coupling to emit alternating current into the formation , Measuring the current or potential of each button electrode, the impedance of the button can be obtained and the impedance signal can be calibrated to obtain the image reflecting the formation characteristics.This paper presents a new imaging processing method, which processes the measured complex signal through data processing, Which not only can obtain the formation resistivity image but also can obtain the formation’s dielectric constant image.It verifies the formation model by using this method and at the same time conducts imaging processing on the measurement data of the test well to obtain a clear resistivity image and Dielectric constant image.