致密砂岩储层微观孔喉结构表征方法综述

Summary of characterization methods for micro-pore throat structure of tight sandstone reservoirs

微观孔喉结构研究通常指的是对孔喉的大小、形态及连通性的研究。致密油气藏的孔喉结构决定了其低孔低渗的特点,也决定了储层是否具有有效性。微观孔喉结构表征对于致密砂岩储层研究具有深远意义。致密砂岩储层微观孔喉结构的表征方法有两种:一种是数据分析技术,另一种是图像分析技术。两种表征方法各有利弊,在研究过程中需要综合分析,合理取舍,才能全尺度精细定量表征致密砂岩储层的微纳米级孔喉系统。

The study of microscopic pore throat structure usually refers to the study of the size,shape and connectivity of pore throats.The pore throat structure of a tight oil and gas reservoir determines its low porosity and low permeability,and also determines whether the reservoir is effective.The characterization of the microscopic pore throat structure is of far-reaching significance for the study of tight sandstone reservoirs.There are two characterization methods for the microscopic pore throat structure of tight sandstone reservoirs:one is data analysis technology,and the other is image analysis technology.The two characterization methods have their own advantages and disadvantages.In the research process,comprehensive analysis and reasonable selection are needed to accurately and quantitatively characterize the micro-nano-scale pore-throat system of tight sandstone reservoirs on a full scale.