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首页> 外文期刊>Geosciences >Formation MicroScanner Providing Better Answers for Carbonate Secondary Porosity in Alamein Dolomite Formation, NW Desert, Egypt
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Formation MicroScanner Providing Better Answers for Carbonate Secondary Porosity in Alamein Dolomite Formation, NW Desert, Egypt

机译：地层显微扫描仪为埃及西北沙漠阿拉曼白云岩地层的碳酸盐二次孔隙提供了更好的答案

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The use of borehole imaging tools has become widespread in recent years with more specialized studies of reservoir properties, particularly in highly-porous and fractured carbonate systems. In this study, the Formation MicroScanner (FMS) borehole imaging tool and conventional well log data have been used to study the secondary porosity of the dolomitic Alamein Formation in the Alamein Field, north Western Desert, Egypt. Based on well log analyses of the formation from Tourmaline-1X and N.Alamein-6X wells, we show that secondary porosity occurs across the formation, and is filled mostly with hydrocarbon. We also show that the formation has good average effective porosity and hydrocarbon saturation. FMS images of the Tourmaline-1X well confirms that the formation is intermittently vuggy with solution-filled channels from the top to its base. The vug pores are observed to be well-connected, which supports good effective porosity values interpreted from petrophysical data. An additional set of core photographs of the Alamein Formation from N.Alamein-5X well confirms the presence of secondary pores, which are filled by hydrocarbon, and exhibit intense fluorescence under UV light. Our results show that the abundance of secondary porosity in Alamein Formation would play a key role in evaluating its reservoir quality and reservoir performance.
机译：近年来，随着对储层特性的更专业研究，尤其是在高孔隙度和压裂碳酸盐岩系统中，钻孔成像工具的使用已变得广泛。在这项研究中，地层显微扫描仪（FMS）钻孔成像工具和常规测井数据已用于研究埃及西北沙漠阿拉曼油田白云质阿拉曼组的次生孔隙度。基于对电气石1X和N.Alamein-6X井的地层的测井曲线分析，我们显示出整个地层均发生了次生孔隙，并且大部分被烃类填充。我们还表明该地层具有良好的平均有效孔隙度和烃饱和度。电气石-1X的FMS图像很好地证实了地层是间歇性的，从顶部到其底部都有溶液填充的通道。观察到孔洞孔隙连通性良好，这支持了根据岩石物理数据解释的良好有效孔隙度值。来自N.Alamein-5X的Alamein地层的另一组核心照片很好地证实了次生孔隙的存在，这些次生孔隙被烃填充，并在紫外光下表现出强烈的荧光。我们的研究结果表明，阿拉曼组的大量次生孔隙度将在评价其储层质量和储层性能方面发挥关键作用。

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