Developments in synchrotron X-ray microtomography with applications to flow in porous media
Developments in synchrotron X-ray microtomography with applications to flow in porous media
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DOI：
10.2118/50985-pa
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发表时间：
1998-08-01
影响因子：
2.1
通讯作者：
Soll, W
中科院分区：
文献类型：
--
作者：
Coles, ME;Hazlett, RD;Soll, W
高分辨率计算机显微断层扫描（CMT）与同步加速器X射线源提供的能力，以获得三维（3D）图像的标本与空间分辨率的数量级微米。布鲁克海文国家实验室的显微成像能力。国家实验室同步加速器光源已得到增强，可以提供更大和更高分辨率的储层岩石孔隙网络三维渲染图，所需时间仅为以前第一代扫描方法的一小部分。这些数据被用来模拟真实的多孔介质的数字图像中的单相和多相流特性。孔隙网络的曲折度和连通性的措施，这一直是难以捉摸的参数在运输性能模型进行了分析。我们提出的孔隙度模拟的例子，通过网络建模，以产生初始含水饱和度和剩余油分布在水润湿孔隙系统。此外，孔隙网络可以为更严格的位移模拟提供边界条件框架，例如在所提供的晶格玻尔兹曼模拟注水示例中。模拟和实验之间的直接比较也是可能的。CMT图像的一个6毫米的一个1英寸，直径的油藏岩心样品的分区之前和之后获得的残留油的洪水。流体分布CMT，格子玻尔兹曼水驱模拟，和基于网络建模的澄清被发现是高度相关的。三维可视化的进步将允许更大的消化和解释依赖于孔隙互连性和多孔相互作用的现象。
High resolution computed microtomography (CMT) with synchrotron X-ray sources provides the ability to obtain three-dimensional (3D) images of specimens with a spatial resolution on the order of micrometers. Microimaging capabilities at Brookhaven Natl. Laboratory's Natl. Synchrotron Light Source have been enhanced to provide larger and higher resolution 3D renderings of pore networks in reservoir rocks at a fraction of the time required in previous first generation scanning methods. Such data are used to model single and multiphase flow properties in digital images of real porous media. Pore networks are analyzed for tortuosity and connectivity measures, which have been elusive parameters in transport property models. We present examples of porosimetry simulation through network modeling to produce initial water saturation and residual oil distributions in a water-wet pore system. Furthermore, pore networks can provide the boundary condition framework for more rigorous simulations of displacement, such as in the lattice Boltzmann simulated waterflood example provided. Direct comparison between simulation and experiment is also possible. CMT images of a 6-mm subsection of a 1-in, diameter reservoir core sample were obtained before and after flooding to residual oil. The fluid distributions from CMT, lattice Boltzmann waterflood simulation, and percolation-based network modeling were found to be highly correlated. Advances in 3D visualization will allow even greater digestion and interpretation of phenomena dependent upon pore interconnectivity and multipore interactions.