摘要:
微焦X射线扫描成像技术是在微米—纳米级尺度上对储层岩石物性特征的重构及透视表征,是目前国际范围内较为先进的储层定性定量研究技术。在系统文献资料研究基础上,对微焦X射线扫描成像技术的原理及研究主要内容进行归纳总结,指出该技术是为研究岩石基质及赋存于不同岩石孔隙空间之中的流体而开发建立的不断成熟起来的油气储层定性定量研究技术。可以实现岩石整体、岩石骨架和孔隙三维重构,能够以透视岩心成像的方式直观清晰地观察分析岩石内部三维孔隙空间的分布、大小及其连通性。通过阈值分割,可对孔隙三维组构、孔隙网络中流体流动、天然气水合物生成与分解等特征进行建模分析,达到四维研究的水平。分析探讨了原理及前人研究实例,对其在油气和天然气水合物实际勘探开发运用中的现状及前景做出展望。
Abstract:
The micro-focus X-ray scanning and imaging technology, which has been applied to petrophysical characteristics study on micrometer-nanometer scale, is the most advanced mean for qualitative and quantitative reservoirs description for the time being. Literature research suggests that the technology is currently used to study the rock matrix and the liguid in different kinds of rock pores, and has become a matured qualitative and quantitative technology for oil and gas reservoir description. It can precisely identify the bulk sample, rock matrix and three-dimensional occurrence of pores;rapidly observe and analyze the three-dimensional distribution of rock internal pore space, size and connectivity by perspective imaging of cores. Through the threshold segmentation, we can carry out modeling of three-dimensional pore structure, pore fluid flow network and gas hydrate formation and decomposition for four-dimensional research level. In this paper, the authors analyzed and discussed the principles through application cases of previous studies, and made some suggestions.
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