摘要
三维岩心可视图像能直观、真实和准确地反映岩石在空间的分布情况,而CT扫描成像法建立数字岩心的准确度最高,最接近真实。为此,利用Micro-CT成像技术采集岩心切面在不同时刻的CT扫描图像,运用改进后的Marching Cubes算法,给出构建数字岩心的方法,将所构建的三维数字化岩心成像,从而实现岩心孔隙结构模型的可视化。阐述了MC算法的基本原理,并通过该方法建立了2块砂岩样品的数字岩心。三维数字岩心重建试验结果表明:基于Marching Cubes算法的数字岩心建模方法能更好地对岩石切片进行重建,且耗时较少、精度更高。研究结果验证了新建模方法的有效性与先进性。
The visible three-dimensional core image can intuitively,realistically and accurately represent the rock distribution in space.And the CT scan imaging method has the highest accuracy and the closest result to real rock.Micro-CT imaging technology is used to collect CT scan images of core sections at different times.The modified Marching Cubes(MC)algorithm is used to establish the digital core construction method,based on which the constructed 3D digital core are imaged to realize the visualization of pore structure of core.The basic principle of MC algorithm is introduced.The digital cores of two sandstone samples are established by the Marching Cubes method.The results of 3D digital core reconstruction test show that the digital core modeling method based on the MC algorithm can effectively reconstruct rock sections with less time and higher precision.
作者
赵玲
石雪
夏惠芬
Zhao Ling;Shi Xue;Xia Huifen(The MOE Key Laboratory of Enhanced Oil and Gas Recovery,Northeast Petroleum University;School of Computer and Information Technology,Northeast Petroleum University;School of Petroleum Engineering,Northeast Petroleum University)
出处
《石油机械》
北大核心
2018年第10期97-102,共6页
China Petroleum Machinery
基金
国家自然科学基金项目"二类油层高浓度聚合物驱油机理及优化设计研究"(51374076)
黑龙江省教育厅科技项目"粘弹性聚合物溶液对数字化孔隙介质中油的作用机理研究"(12541z004)
