塔河油田缝洞型碳酸盐岩油藏水驱后剩余油分布主控因素与提高采收率途径  

Controlling factors of remaining oil distribution after water flooding and enhanced oil recovery methods for fracture-cavity carbonate reservoirs in Tahe Oilfield

作　　者：郑松青[1] 杨敏[2] 康志江[1] 刘中春[1] 龙喜彬[2] 刘坤岩[1] 李小波[2] 张世亮[2] ZHENG Songqing;YANG Min;KANG Zhijiang;LIU Zhongchun;LONG Xibin;LIU Kunyan;LI Xiaobo;ZHANG Shiliang(Petroleum Exploration & Production Research Institute,SINOPEC,Beijing 100083,China;Northwest Oilfield Branch,SINOPEC,Urumuqi 830011,China)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石化西北油田分公司,乌鲁木齐830011

出　　处：《石油勘探与开发》2019年第4期746-754,共9页Petroleum Exploration and Development

基　　金：国家科技重大专项(2016ZX05014);国家科技重大专项示范工程(2016ZX05053)

摘　　要：综合岩心、测井、地震、生产动态等多方面资料,对缝洞型碳酸盐岩油藏储集空间多尺度特征、储集体类型、缝洞体空间形态及分布模式、与生产井的配置关系等进行了系统研究,分析了各因素对剩余油分布的影响,建立了水驱后剩余油分布的主控因素模式;结合塔河油田的开发实践,系统研究了提高原油采收率的方法与途径。研究表明,缝洞型碳酸盐岩油藏水驱后剩余油分布主控因素可归结为局部高点、井控不足、连通通道屏蔽和弱水动力4大类。缝洞型碳酸盐岩油藏提高采收率是一个系统工程:天然能量开发阶段,做好生产调控,防止底水窜进;注水早期,依据储集体类型、连通性、空间位置构建注采关系,提高水驱控制及动用程度,尽量减少剩余油;注水开发中后期,依据剩余油分布主控因素及分布特征,通过加强井控、利用重力分异和毛细管的渗吸作用、扰动(改造)流场等措施,实施精准挖潜。同时做好技术储备,开展储集层改造、新型注入介质、智能优化开发等技术的研发,做好注水、注气技术的接替,最大限度地提高采收率。Based on comprehensive analysis of core,well logging,seismic and production data,the multi-scale reservoir space,reservoir types,spatial shape and distribution of fractures and caves,and the configuration relationship with production wells in fracture-cavity carbonate reservoirs were studied systematically,the influence of them on the distribution of residual oil was analyzed,and the main controlling factors mode of residual oil distribution after water flooding was established.Enhanced oil recovery methods were studied considering the development practice of Tahe oilfield.Research shows that the main controlling factors of residual oil distribution after water flooding in fracture-cavity carbonate reservoirs can be classified into four categories: local high point,insufficient well control,flow channel shielding and weak hydrodynamic.It is a systematic project to improve oil recovery in fracture-cavity carbonate reservoirs.In the stage of natural depletion,production should be well regulated to prevent bottom water channeling.In the early stage of waterflooding,injection-production relationship should be constructed according to reservoir type,connectivity and spatial location to enhance control and producing degree of waterflooding and minimize remaining oil.In the middle and late stage,according to the main controlling factors and distribution characteristics of remaining oil after water flooding,remaining oil should be tapped precisely by making use of gravity differentiation and capillary force imbibition,enhancing well control,disturbing the flow field and so on.Meanwhile,backup technologies of reservoir stimulation,new injection media,intelligent optimization etc.should be developed,smooth shift from water injection to gas injection should be ensured to maximize oil recovery.

关 键 词：碳酸盐岩 缝洞型油藏 多尺度性 剩余油分布 主控因素 提高采收率 

分 类 号：TE344[石油与天然气工程—油气田开发工程]