极端耗水层带形成机制及流场调控增效模式——以陆相砂岩特高含水后期整装油田为例  

Formation mechanism of extreme water consumption zone and synergistic mode of flow field regulation:A case study of uncompartmentalized oilfield of continental sandstone in the late stage of ultra-high water cut

作　　者：束宁凯 刘丽杰 姚秀田[3] 黄迎松[2] 赖枫鹏[4] 崔文富[5] SHU Ningkai;LIU Lijie;YAO Xiutian;HUANG Yingsong;LAI Fengpeng;CUI Wenfu(Sinopec Petroleum Exploration and Development Research Institute,Beijing 102206,China;Exploration and Development Research Institute,Sinopec Shengli Oilfield Company,Dongying,Shandong 257015,China;Gudao Oil Production Plant,Sinopec Shengli Oilfield Company,Dongying,Shandong 257231,China;School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China;Shengli Oil Production Plant,Sinopec Shengli Oilfield Company,Dongying,Shandong 257400,China)

机构地区：[1]中国石化石油勘探开发研究院,北京102206 [2]中国石化胜利油田分公司勘探开发研究院,山东东营257015 [3]中国石化胜利油田分公司孤岛采油厂,山东东营257231 [4]中国地质大学(北京)能源学院,北京100083 [5]中国石化胜利油田分公司胜利采油厂,山东东营257400

出　　处：《油气藏评价与开发》2024年第2期237-246,266,共11页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项“胜利油田特高含水期提高采收率技术”(2016zx05011);中国石化重点科技项目“胜坨油田特高含水期深度开发关键技术”(P20070-4)。

摘　　要：以胜利油区陆相砂岩油藏整装油田为代表,主力单元进入特高含水后期(含水率大于95%),局部区域出现极端耗水现象,水油比急剧上升,注入水利用率大幅下降,吨油操作成本成倍增加,经济效益变差,但油藏中还有60%左右剩余地质储量。注入水沿着极端耗水层带窜流是制约陆相砂岩整装油田特高含水后期效益开发的关键问题。以提高特高含水老油田开发效益为目标,明晰了极端耗水层带形成机制及调控机理,建立了基于老井的变流线调控极端耗水层带扩波及方法,形成特高含水后期油藏精准描述及调控极端耗水层带扩波及的效益开发技术体系。通过应用流场调控技术,使传统认为含水率98%近废弃油藏开展示范应用,基于极端耗水层带流场调控经济寿命期延长10a以上,产油量大幅增加,含水率下降,吨油操作成本下降,实现了特高含水后期老油田低成本开发。Represented by the integrated oilfield of the continental sandstone reservoir in Shengli Oil Zone,the main unit of which has entered the late stage of ultra-high water cut(>95%).This stage has led to significant challenges,including extreme water consumption in certain areas,a sharp increase in the water-to-oil ratio,a marked decline in the utilization rate of injected water,rising operating costs per ton of oil,and diminishing economic returns.Despite these issues,approximately 60%of the remaining geological reserves are still present in the reservoir,making the widespread drilling of new wells economically unfeasible.The primary obstacles to profitable development at this stage include the preferential flow of injected water through zones of extreme water consumption and limited dynamic sweep efficiency.Addressing the identification,description,and management of these extreme water consumption zones is crucial for achieving profitable development in maturing oilfields with ultra-high water cuts.This paper suggests a comprehensive approach to tackle these challenges.It involves understanding the formation and control mechanisms of extreme water consumption zones,characterizing reservoir heterogeneity based on configuration and lithology,quantitatively describing the distribution of these zones,and devising strategies to regulate their expansion using variable streamlines in existing wells.The goal is to develop a suite of profitable development technologies that enable precise reservoir characterization and effective management of extreme water consumption zones in the late ultra-high water cut stage.Traditionally,a reservoir with a 98%water cut is considered nearly depleted.However,by applying key technologies for flow field regulation and benefit enhancement to a demonstration unit within such a reservoir,its economic lifespan can be extended by over a decade.This approach can stabilize annual oil production,reduce water cut,lower operating costs per ton of oil,and facilitate low-cost development in maturing o

关 键 词：陆相油藏 特高含水后期 极端耗水层带 流场调控 增效模式 关键技术 

分 类 号：TE341[石油与天然气工程—油气田开发工程]