数值模拟发现复合驱油过程中存在两种不同驱动状况  

TWO DIFFERENT DRIVEN CONDITIONS DISCOVERED IN THE NUMERICAL SIMULATION OF COMBINED OIL DISPLACEMENT

作　　者：戚连庆[1] 刘宗昭[1] 陈礼[1] 尹彦君[1] 刘全刚[1] 陈洪[2] 

机构地区：[1]中海油能源发展股份有限公司采油技术服务分公司,天津300452 [2]华北油田公司勘探开发研究院,河北任丘062552

出　　处：《大庆石油地质与开发》2009年第4期84-90,共7页Petroleum Geology & Oilfield Development in Daqing

摘　　要：油藏数值模拟研究驱油方案过程中发现，驱油过程中，毛管数增大，驱油效果改善，但当毛管数超过一定范围，出现驱油效果相对变差变化。对不同毛管数条件下驱油过程研究得出，在毛管数超过一极限毛管数后，出现水相流速相对加大变化，即发生了驱动状况变化。通过深入剖析两种驱动状况，找到了模拟计算出现驱动转化的原因是来自于软件有关相渗透率曲线的描述。结论不仅得到了实验验证，而且在现场试验中找到了证据，在此基础上又完成了新的毛管数实验曲线。研究成果，可为复合驱技术的实际应用提供指导。In the course of oil displacement studies by numerical simulation, it is discovered that the oil-displaced performance is improved whenever the capillary number increases, but the effects will become bad as the number exceeds a limit value. Through the meticulous analysis, when the capillary number exceeds above limit, water phase velocity will be faster and the driven conditions change correspondingly. After deeply analyzing two states in driving process, the cause of the above change is related to relative permeability description in software. The research results have been verified not only by experiments but also by field test. On the basis of the above, the new lab curve of capillary number has been established. The research significance is unusual, and it could give the instructional suggestion to the practical application of chemical flooding technology. This study results can provide practical guide for combined oil displacement.

关 键 词：数值模拟 驱动状况 界面张力 毛管数 表活剂浓度 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]