石油实验地质Issue(3)：370-375,6.DOI:10.11781/sysydz201403370
低渗透砂岩天然气运移和聚集模拟实验
Experimental study on gas migration and accumulation in low-permeability sandstone reservoirs
摘要
Abstract
The explorations of gas reservoirs in low-permeability sandstones have indicated that they have unique characteristics, hence are difficult to interpret and describe with conventional natural gas accumulation theories. Based on the experiments of natural gas charging of cores, the migration and accumulation characteristics of natu-ral gas in low-permeability sandstone reservoirs were studied. It has been concluded that the main gas migration way is diffusion when the driving force is less than the minimum reservoir resistance;the main migration way is non-Darcy flow when the driving force is between the minimum and maximum reservoir resistance;the main mi-gration way is Darcy flow when the driving force is more than the maximum reservoir resistance. It is this complex gas migration and accumulation way that leads to complicated gas water distribution relationship in low-permeabi-lity sandstones. The process of gas migration and accumulation is controlled by the driving force of gas migration and accumulation, sandstone physical properties and bound water saturation. With the increase of driving force, gas saturation gradually improves and finally becomes stable ( usually less than 60%) due to the influence of bound water in sandstone reservoirs. With the same driving force, gas saturation increases with the improvement of permeability, which explains the accumulation of “desserts”.关键词
低渗透砂岩/天然气运聚/非达西流/储层物性/充注动力Key words
low-permeability sandstone/natural gas migration and accumulation/non-Darcy flow/reservoir physical property/driving force分类
能源科技引用本文复制引用
林晓英,郭春阳,曾溅辉,高宇..低渗透砂岩天然气运移和聚集模拟实验[J].石油实验地质,2014,(3):370-375,6.基金项目
国家自然科学基金项目（40772088）和中国地质大学构造与油气资源教育部重点实验室开放课题（TPR-2012-13）共同资助。 （）
