基于数字岩心的低渗透率储层微观渗流和电传导数值模拟

摘要

The research of microscopic percolation mechanism in pores based on digital cores is the development trend of fine reservoir description, also is the inevitable choice to carry out the technique of increasing the oil recovery factors on the micro scale.In order to characterize the pore space structure in detail and visualize digital cores rebuilt by CT scanning method with the advanced visualization Avizo software, thus, observed are the porosity, size and location of pore throat, pore space area, skeleton volume, the bridges between digital core geometry model and micro seepage simulation is set up through surface simplification of data body, triangular surface repair and triangular mesh optimization.Numerical simulation of fluid flow and electrical conductivity in micro pores are realized.%以数字岩心为基础的孔隙微观渗流机理研究是精细油藏描述的发展趋势,也是在微观尺度上开展提高原油采收率技术的必然选择.为详细表征孔隙空间结构,利用高级可视化软件Avizo对由CT扫描法重建的数字岩心进行可视化,直观形象地考察了孔隙度、孔喉大小和方位、孔隙空间面积、骨架体积等的定量分布,通过数字岩心数据体表面简化、三角形表面修复和三角网格优化架起了数字岩心几何模型到微观渗流模拟的桥梁,实现了微观孔隙中流体渗流和电传导数值模拟.