西南石油大学学报(自然科学版) ›› 2008, Vol. 30 ›› Issue (6): 121-125.DOI: 10.3863/j.issn.1000-2634.2008.06.029

• 石油与天然气工程 • 上一篇    下一篇

气水交替驱油藏注入能力分析及优化

李菊花1a,1b 姜涛1c 高文君2 刘滨2   

  1. 1.长江大学:a.石油工程学院,b.油气资源与勘探技术教育部重点实验室,c.科学技术处,湖北 荆州 434023;2.中国石油吐哈油田分公司勘探开发研究院,新疆 哈密 839009
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-12-20 发布日期:2008-12-20

ANALYSIS AND OPTIMIZATION OF INJECTIVITY BY GASALTERNATINGWATER FLOODING IN RESERVOIR

LI Ju-hua1a,1b JIANG Tao1c GAO Wen-jun2 LIU Bin2   

  1. 1.Yangtze University:a.Department of Petroleum Engineering,b.Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education,c.Science and Technology Agency,Jingzhou Hubei 434023,China;2.Exploration and Development Research Institute,Tuha Oilfield Company,CNPC,Hami Xinjiang 839009,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-12-20 Published:2008-12-20

摘要: 针对注入能力降低是制约气水交替驱提高油藏采收率的关键因素的问题,以相似理论中的检验分析法推导了气水交替注入无因次注入能力方程,运用考虑相渗和毛管滞后效应耦合的数值模拟方法,评价无因次注入能力的因素影响,讨论并优化了注入水气比。研究结果表明:对于特定油藏体系,通过增加注入气的富化度提高粘滞力重力比来达到改善驱替效果的方法比片面地增加注气速度更高一些;水气比越高,达到相同开采效果所需气量越小,但因此而出现较明显的注入能力下降的趋势。对于低粘滞力重力比的注气条件,选择水气比为2最佳;而对于高粘滞力重力比,则水气比为1是最佳选择。建议在水气比的优选时充分结合油藏地质特征和注入流体特性进行分析。

关键词: 气水交替驱, 无因次注入能力, 检验分析法, 水气比, 粘滞力重力比

Abstract: Injectivity reduction is an important factor to restrict recovery increase by gasalternatingwater flooding.Based on dimensionless scaling rule by inspectional analysis,the plot displaying the relationship between dimensionless injectivity and heterogenity is established in threephases relative permeability and capillary pressure hysteresis model by compositional simulation.Meanwhile,the optimal ratio of injected water and gas is obtained.The results show that displacement effect by increasing enrichment of injection gas is batter than by increasing injection velocity in a certain reservoir system,injectivivty decline trend is more obvious if water/injection gas ratio is higher.The optimal injection is that WGR is 2 for low viscous and gravity force ratio and WGR 1 for low viscous and gravity force ratio.It suggests that characteristic of formation and injecting fluid is involved in discussing injecting optimization

Key words: gasalternatingwater flooding, dimensionless injectivity, inspectional analysis, water and gas ratio, viscous and gravity force ratio

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