Simulation and visualization of the displacement between CO2 and formation fluids at pore-scale levels and its application to the recovery of shale gas
Peng Hou
Feng Gao
Jianguo Wang
Jian He
摘要：This article reports recent developments and advances in the simulation of the CO2-formation fluid displacement behaviour at the pore scale of subsurface porous media.Roughly,there are three effective visualization approaches to detect and observe the CO2-formation fluid displacement mechanism at the micro-scale,namely,magnetic resonance imaging,X-ray computed tomography and fabricated micromodels,but they are not capable of investigating the displacement process at the nano-scale.Though a lab-on-chip approach for the direct visualization of the fluid flow behaviour in nanoscale channels has been developed using an advanced epi-fluorescence microscopy method combined with a nanofluidic chip,it is still a qualitative analysis method.The lattice Boltzmann method (LBM) can simulate the CO2 displacement processes in a two-dimensional or three-dimensional (3D) pore structure,but until now,the CO2 displacement mechanisms had not been thoroughly investigated and the 3D pore structure of real rock had not been directly taken into account in the simulation of the CO2 displacement process.The status of research on the applications of CO2 displacement to enhance shale gas recovery is also analyzed in this paper.The coupling of molecular dynamics and LBM in tandem is proposed to simulate the CO2-shale gas displacement process based on the 3D digital model of shale obtained from focused ion beams and scanning electron microscopy.
机标关键词：scanning electron microscopypore structurelattice Boltzmann methoddisplacement mechanismcomputed tomographymolecular dynamicsanalysis methodflow behaviour
资助基金：The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China(Grant .51374213 and 51674251)the State Key Research Development Program of China(Grant 2016YFC0600705)the National Natural Science Fund for Distinguished Young Scholars of China(Grant 51125017)the Fund for Innovative Research and Development Group Program of Jiangsu Province(Grant 2014-27)the Science Fund for Creative Research Groups of the National Natural Science Foundation of China(Grant 51421003)the Priority Academic Program Development of the Jiangsu Higher Education Institutions(PAPD 2014)
论文发表日期：2016-01-01
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：19( 351-369 )
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