CT技术在油气勘探领域中的应用

Application of X-ray CT Technique to Petrolem Exploration

从CT技术的基本原理出发 ,阐述了应用CT技术测定岩心的岩性、孔隙度、储层岩心饱和度分布及计算岩心裂缝参数的基本原理和方法 ,表明CT技术能在被测物体无损的条件下测量、计算被测物体断面的密度分布 ,以计算机断面图像形式并通过灰度变化反映出断面材质的密度变化 ,从而清晰、直观、准确地呈现出被测物体内部的结构关系、尺寸、材质的组成变化情况。应用CT技术测量的实质就是对被测物体的层面进行密度测量。实践证明 ,该方法是油藏描述和地层评价的有效方法。

Starting from the basic principle of the CT technique, this paper introduces the solutions for measuring the core lithology, porosity, and saturation distribution. it also discusses the arithmetic for the core fracture parameter. CT technique can detect the density distribution of the measured core section without any damage,and show the density change of the core in the form of computer image's color, consequently it presents the interior frame, dimension, the component and so on. CT technique virtually measures the density of the object lay. Proved by the practice, CT technique is an effective measure for reservoir description and stratigraphic evaluation.