基于数字岩心的低渗透储层微观渗流机理研究  

Mechanism of Micro Seepage in Low-Permeability Reservoirs Based on Digital Core

作　　者：王平全[1] 陶鹏[1] 刘建仪[1] 黄丽莎[2] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]长江大学资源与环境学院,湖北武汉430100

出　　处：《非常规油气》2016年第6期1-5,共5页Unconventional Oil & Gas

基　　金：国家自然科学基金"高含硫气藏井筒硫沉积机理研究"(51474181)

摘　　要：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,也是微观尺度上提高原油采收率的必然选择。为详细表征低渗透储层微观孔隙空间结构,利用高级可视化软件Avizo对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,结合有限元软件研究了附面层厚度和黏度对低渗透储层微观渗流的影响。结果表明,附面层相对黏度一定时,低渗透储层中流体的实际黏度随附面层相对厚度增大而增大;附面层相对厚度一定时,低渗透储层中流体的实际黏度随附面层相对黏度的增大而增大。低渗透储层中流体流量随附面层相对黏度的增大而减小。Research on microscopic percolation mechanism in pores based on digital core is the development trend of fine reservoir description,and is also the inevitable choice to improve the oil recovery on the micro scale. In order to characterize the micro pore space structure of the low permeability reservoir in detail,realize the visualization of digital core that rebuilt by CT scanning method and advanced visualization software Avizo,the porosity,pore size and position,pore space area and skeleton volume have been investigated vividly,and studied the effect of boundary layer thickness and viscosity on the micro seepage of low-permeability reservoirs combined with the finite element software. The results showed that when the relative viscosity of boundary layer is constant,the actual viscosity of fluid in the low permeability reservoir increases with the increase of the relative thickness of boundary layer; when the relative thickness of boundary layer is constant,the actual viscosity of fluid in the low permeability reservoir increases with the increase of relative viscosity of boundary layer.The flow rate of fluid in low permeability reservoir decreases with the increase of relative viscosity of boundary layer.

关 键 词：Avizo软件 数字岩心 三维重构 微观渗流 附面层 

分 类 号：TE312[石油与天然气工程—油气田开发工程]