基于岩石铸体薄片图像的数字岩心三维重构

由于岩心三维重构的CT扫描方法成本高昂,提出一个基于光学显微镜下铸体薄片图像的数字岩心三维重构方法。研究对采集的铸体薄片图像进行图像处理获得重构的训练图像模板,再应用多点地质统计学进行图像模板特征提取与数字岩心三维重构。实验采用鄂尔多斯盆地苏里格地区的若干岩心样本进行效果测试,结果表现为三维重构后的数字岩心孔径尺寸分布与真实值趋势相同,孔隙度的相对误差均在8%以内。上述研究内容表明基于岩石铸体薄片图像进行数字岩心的三维重构是有效的。

3D Digital Rock Core Reconstruction Based on Casting Slice Image

For the reason of high costing on 3D core reconstruction by using CT scanning method, a new method named 3D digital core reconstruction based on rock casting slice images under optical microscope is proposed in this paper. Firstly, the collected casting slice images are processed to acquire the reconstructed image templates, and then multiple-point geostatistics is applied for feature extracting on these image templates and 3D reconstructing on the digital core. The core samples used in the experiment are taken from Sulige region in Ordos basin. The experiment outcome shows that the core aperture distributions and the real value have the same trend and the relative error of porosity is lower than 8%. The above researches show that the rock casting slice image based 3D Digital Core Reconstruction methodology is effective.