致密油储层孔喉微观结构表征技术研究进展

 致密油储层中孔隙是储集油气的空间与渗流发生的主要场所，且其孔隙分布呈现多种尺度，储层微观孔隙结构精确表征是非常规油气研究的重点与难点。对目前致密油储层孔隙结构表征技术进行了分类，总结了实验数据分析技术、图像分析技术与数字岩心技术的内涵及发展，并指出了其测试孔隙大小范围和优缺点；展望了致密油储层微观孔隙结构表征技术的发展趋势。

Research progress on microstructure characterization of pore throat for tight oil reservoirs

With the great success of unconventional oil and gas exploration and development in the world, more and more attention has been paid to the pore structure characteristics of tight rock reservoirs. The soul of unconventional oil and gas research is the reservoir, the goal of which is to answer how much oil and gas is stored in the reservoir. Pores in tight oil reservoirs are the main places for oil and gas storage and percolation, therefore, it is the key and difficult point for unconventional oil and gas research to accurately characterize the microscopic pore structure of reservoirs. This paper classifies the pore structure characterization technologies of tight oil reservoirs, namely experimental data analysis technology, image analysis technology and digital core technology. Each type of characterization technology is summarized, and its test range for pore size, advantage and disadvantage are pointed out. Finally, by reviewing the existing characterization technology, the development trend of microscopic pore structure characterization technology for tight oil reservoirs is further prospected.