基于微焦点CT的三维数字岩心分析研究进展

RESEARCH ADVANCE OF 3D DIGITAL CORE ANALYSIS BASED ON THE MICRO-FOCUS CT

基于微焦点CT的三维数字岩心分析技术已成为研究岩石孔隙尺度下流体渗流及驱替机理的行之有效的方法。从微焦点CT扫描、模拟方法和储层物性参数评价3个方面,阐述了国内外基于微焦点CT的三维数字岩心分析技术的研究进展,为该技术的深入研究提供参考。通过对三维数字岩心分析研究现状进行总结,认为存在3个有待于改进和研究的问题:(1)孔隙介质中流体渗流及驱替机理的升尺度模拟;(2)孔隙尺度下岩石物理属性的准确表征;(3)非常规油气资源的三维数字岩心分析。

3D digital core analysis technique based on the micro-focus CT has become one of the most effective methods for researching the fluid flowing and displacing mechanisms on the scale of the rock pore. From the view- points of the micro-focus CT, simulating method and evaluation of the reservoir physical-property parameters, the research advance of 3D digital core analysis technology at home and abroad is discussed, thus the references are presented for the further study and investigation of the technique. The summary of the current conditions of the core analysis and research show that there are three following problems needed to be improved and further investigated： （ 1 ） upscaling modeling for the flowing and displacing mechanisms in the porous media ; （ 2 ） accurate characteriza- tion of the petrophysical properties on the pore scale ; （ 3 ） 3D digital core analysis of unconventional hydrocarbon resources.