基于CT技术评价水驱岩心储渗特征的方法

Evaluation on Core Seepage-flow Characteristics in Water Flooding by CT Technique

研究水驱采油中的流动特征,对跟踪油藏的开发过程,持续提高石油采收率具有显著的指导意义。通过对玉门老君庙油田岩心水驱油过程开展CT扫描,取得了岩心孔隙度分布和水驱油过程中含油饱和度分布的实时监测,并由此创新性地提出了6个统计参数对岩心孔隙度与含油饱和度分布的集中趋势、离散程度和分布形态进行表征。通过常规计量法与CT法对比表明,应用CT法研究岩心孔隙度与含油饱和度具有较高的精度,可以借此更加详细地研究岩心的水驱油流动特征。

Study on flow characteristics of water flooding is great significance for reservoir development tracking and enhanced oil recovery. A core from Yumen oil field Laojunmiao block was scanned by x-ray CT,and its porosity and oil saturation distribution were real-time observed during water flooding experiment. Six statistical parameters were initiatively advised to characterize the central tendency,discrete degree and distribution form of its porosity and oil saturation distribution. In conventional method,the oil saturation is computed by measuring the volume of oil and water in the core flooding experiment. Comparing the results of conventional way with those from CT scanning,there＇s high accuracy in this new way which strongly indicates that CT scan can be a reliable tool for more detailed core analysis and water flooding research.