摘要
目前东海西湖凹陷的充注成藏机理以及充注物性下限研究在致密砂岩中缺少研究成果及应用,通过气体充注模拟、毛管压力曲线测定以及核磁共振成像驱替等实验,对东海某气田开展致密砂岩气藏充注成藏机理以及充注物性下限分析。研究表明,在气体充注过程中,存在成藏门限压力,主要为非达西渗流。其充注成藏的孔隙度的下限值为6.2%,渗透率的下限值为0.05mD。
At present,there is a lack of research results and applications on the mechanism offilling and reservoir formation and the lower limit offilling physical properties in tight sandstone.Through experiments such as gasfilling simulation and microscopic pore roar analysis,thefilling and reservoir formation stage and the lower limit offilling physical properties of tight sandstone gas reservoirs in a gasfield in the East China Sea are analyzed.The study shows that there is a threshold pressure for reservoir formation in the process of gas filling,which is mainly non-Darcy seepage.The lower limit of porosity and permeability of industrial gas flow is 6.2%and 0.05mD respectively.The process of natural gasfilling and reservoir formation is divided into three stages;Thefirst stage:start the air intake stage,the second stage:the rapid growth stage offilling,and the third stage:the slow growth stage offilling.
作者
郭雷
张承洲
冷捷
杨龙
丁歌
Guo Lei;Zhang Chengzhou;Leng Jie;Yang Long;DingGe(Cnooc Experimental Center,Engineering Technology Branch,CNOOC Energy Development Co.,LTD,Shanghai 200941)
出处
《石化技术》
CAS
2024年第2期155-157,共3页
Petrochemical Industry Technology
关键词
致密砂岩气藏
物性下限值
孔隙度
渗透率
充注成藏
Tight sandstone gas reservoir
Lower limit value of physical properties
Porosity
Permeability
Filling and forming reservoirs
