摘要
缝洞型碳酸盐岩油藏中裂缝发育程度高,非均质性极强,注气开发是一种行之有效的开发方式。为研究N2在裂缝中的驱油效果以及波及规律,在满足相似准则条件下利用油藏地质资料设计制作两套室内物理模型,研究N2在不同开度裂缝中的驱油效果、波及路径和运移特征。研究结果表明:不同开度裂缝的驱油效果存在明显差异,毛管阻力和重力分异作用是影响N2波及路径主要因素。建立无量纲指数ω分析对比毛管力和重力分异作用的相对大小,预判N2在裂缝中的运移特征,对缝洞型碳酸盐岩油藏生产动态研究具有一定的指导意义。
Fracture-vuggy carbonate reservoir has high degree of fracture development and strong heterogeneity. Gas injection is an effective development method. In order to study the oil displacement effect and sweep law of N2 in fractures,two sets of laboratory physical models were designed and manufactured by using geological data of reservoir under the condition of similarity criterion. The oil displacement effect,sweep path and migration characteristics of N2 in different aperture fractures was studied. The results showed that there existed obvious differences in oil displacement efficiency of different aperture fractures. Capillary resistance and gravity differentiation were the main factors which affect the sweep path of N2. Through the establishment of dimensionless index ω, the relative magnitude of capillary force and gravity differentiation was analyzed and compared, and the migration characteristics of N2 in fractures could be predicted. The results has a certain guiding significance for the study of production performance of fracture-vuggy carbonate reservoirs.
作者
闻宇晨
屈鸣
侯吉瑞
梁拓
马仕希
吴伟鹏
杨景斌
WEN Yuchen;QU Ming;HOU Jirui;LIANG Tuo;MA Shixi;WU Weipeng;YANG Jingbin(Research Institute of Unconventional Petroleum Science and Technology,China University of Petroleum(Beijing),Beijing 102249,P R of China;MOE Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2019年第2期291-296,347,共7页
Oilfield Chemistry
基金
国家科技重大专项“缝洞型油藏泡沫辅助气驱提高采收率技术研究”(项目编号2016ZX05014-004-004)
国家科技重大专项“缝洞型油藏注气提高采收率机理研究“(项目编号2016ZX05014-004-001)
关键词
缝洞型碳酸盐岩油藏
裂缝
重力分异
毛管阻力
提高采收率
fractured-cavity carbonate reservoir
fractures
gravity differentiation
capillary resistance
enhanced oil recovery.
