准确预测剩余油相对富集区提高油田注水采收率研究
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摘要
经过几十年的开采,我国国内主要的老油田已进入高含水后期甚至特高含水期,地下剩余油呈“整体高度分散、局部相对富集”的状态,传统的油藏描述方法已不能准确地描述和预测处于十分复杂分布状态的地下剩余油。因此,准确预测油层中剩余油、特别是其富集部位的分布状态,将是高含水油田进行调整挖潜、提高注水采收率的基础和关键。因此,综合运用地质、开发地震、测井、精细数值模拟等技术,搞清剩余油的分布状况,在剩余油富集部位钻出各种类型的不均匀高效调整井(包括直井、侧钻井、水平井或分支井)或实施其他综合调整措施,可以更有效地采出剩余油,提高油田注水采收率。
Most oilfields in China have entered into their mature stage with a high or extra-high water cut after several decades of development.At this stage,the distribution of remaining oil in mature reservoirs is characterized by "highly scattered in the whole field and relatively abundant in some localities".The traditional reservoir description technologies cannot meet the requirement of prediction of the very complicated remaining oil distribution.Therefore,precisely predicting the distribution of scattered remaining oil,especially predicting the locations of these abundant areas,becomes the key to effectively revitalizing mature reservoirs and improving their secondary recovery.It is necessary to get a distinct understanding of the location of the abundant remaining oil by integration of geology,seismic,logging and sophisticated numerical simulation technologies to drill various efficient uneven wells including straight,sidetrack,horizontal and multi-lateral wells in the abundant area of remaining oil or to adopt other comprehensive recovery techniques.In this way,the remaining oil can be produced,and the secondary oil recovery can be improved.
Most oilfields in China have entered into their mature stage with a high or extra-high water cut after several decades of development.At this stage,the distribution of remaining oil in mature reservoirs is characterized by "highly scattered in the whole field and relatively abundant in some localities".The traditional reservoir description technologies cannot meet the requirement of prediction of the very complicated remaining oil distribution.Therefore,precisely predicting the distribution of scattered remaining oil,especially predicting the locations of these abundant areas,becomes the key to effectively revitalizing mature reservoirs and improving their secondary recovery.It is necessary to get a distinct understanding of the location of the abundant remaining oil by integration of geology,seismic,logging and sophisticated numerical simulation technologies to drill various efficient uneven wells including straight,sidetrack,horizontal and multi-lateral wells in the abundant area of remaining oil or to adopt other comprehensive recovery techniques.In this way,the remaining oil can be produced,and the secondary oil recovery can be improved.
引文
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[9]李阳.储层流动单元模式及剩余油分布规律[J].石油学报,2003,24(3):52-55.Li Yang.Flow unit mode and remaining oil distribution in reser-voir[J].Acta Petrolei Sinica,2003,24(3):52-55.
[10]刘建民,徐守余.河流相储层沉积模式及对剩余油分布的控制[J].石油学报,2003,24(1):58-62.Liu Jianmin,Xu Shouyu.Reservior sedimentary model of fuuvialfacies and It’s control to remaining oil distribution[J].Acta Pe-trolei Sinica,2003,24(1):58-62.
[11]石占中,张一伟,熊琦华,等.大港油田港东开发区剩余油形成与分布的控制因素[J].石油学报,2005,26(1):79-86.Shi Zhanzhong,Zhang Yiwei,Xiong Qihua.Control factors forformation and distribution of residual oil in Gangdong develop-ment area of Dagang Oilfield[J].Acta Petrolei Sinica,2005,26(1):79-86.
[2]韩大匡.深度开发高含水油田提高采收率问题的探讨[J].石油勘探与开发,1995,22(5):47-55.Han Dakuang.An approach to deep development of high water-cut oil fields to improve oil recovery[J].Petroleum Explorationand Development,1995,22(5):47-55.
[3]韩大匡,万仁溥.多层砂岩油藏开发模式[M].北京:石油工业出版社,1999:2-10.Han Dakuang,Wan Renpu.The development model of multizonesandstone reservoirs[M].Beijing:Petroleum Industry Press,1999:2-10.
[4]Sheriff R E.Encyclopedic dictionary of exploration geophysics[M].3th ed.Tulsa:SEG,1990:68-69.
[5]Widess M B.How thin is a thin bed[J].Geophysics,1973,38(6):1 176-1 180.
[6]刘文岭,韩大匡,叶继根,等.高含水后期井震联合剩余油预测技术研究∥阎存章.井间剩余油饱和度检测技术文集[G].北京:中国石油学会石油工程学会,石油工业出版社,2005:40-47.Liu Wenling,Han Dakuang,Ye Jigen.Techniques of predictingremaining oil at high water cut stage∥Yan Cunzhang.Collectionof thesis about detection techniques of inter-well remaining oilsaturation[G].Beijing:China Association of Petroleum Engineer-ing of Chinese Petroleum Society,Petroleum Industry Press,2005:40-47.
[7]吕晓光,张永庆,陈兵,等.深度开发油田确定性与随机建模结合的相控建模[J].石油学报,2004,25(5):60-64.LüXiaoguang,Zhang Yongqing,Chen Bing,et al.Facies-con-trolled modeling for mature developed oilfield by integrating de-terminacy and stochastic methods[J].Acta Petrolei Sinica,2004,25(5):60-64.
[8]宋保全,李音,席国兴,等.储层精细描述技术在杏北油田开发调整中的应用[J].石油学报,2001,22(1):72-77.Song Baoquan,Li Yin,Xi Guoxing.The application of detaileddescription reservoir techniques in Xingbei area[J].Acta PetroleiSinica,2001,22(1):72-77.
[9]李阳.储层流动单元模式及剩余油分布规律[J].石油学报,2003,24(3):52-55.Li Yang.Flow unit mode and remaining oil distribution in reser-voir[J].Acta Petrolei Sinica,2003,24(3):52-55.
[10]刘建民,徐守余.河流相储层沉积模式及对剩余油分布的控制[J].石油学报,2003,24(1):58-62.Liu Jianmin,Xu Shouyu.Reservior sedimentary model of fuuvialfacies and It’s control to remaining oil distribution[J].Acta Pe-trolei Sinica,2003,24(1):58-62.
[11]石占中,张一伟,熊琦华,等.大港油田港东开发区剩余油形成与分布的控制因素[J].石油学报,2005,26(1):79-86.Shi Zhanzhong,Zhang Yiwei,Xiong Qihua.Control factors forformation and distribution of residual oil in Gangdong develop-ment area of Dagang Oilfield[J].Acta Petrolei Sinica,2005,26(1):79-86.
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