裂缝性礁灰岩强底水油藏控水对策研究  

Research on water control strategies for fractured reef limestone reservoirswith strong bottom water

作　　者：杨勇 李芳芳 孙常伟 程佳 刘远志 江任开 YANG Yong;LI Fangfang;SUN Changwei;CHENG Jia;LIU Yuanzhi;JIANG Renkai(CNOOC China Ltd.,Shenzhen Branch,Shenzhen,Guangdong,518054,China;CNOOC EnerTech-Drilling&Production Co.,Tianjin,300452,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518054 [2]中海油能源发展工程技术分公司钻采工程研究院,天津300452

出　　处：《天然气与石油》2024年第2期68-74,共7页Natural Gas and Oil

基　　金：中国海洋石油集团有限公司重大科技专项“南海东部油田上产2 000万吨关键技术研究”(CNOOC-KJ 135ZDXM37SZ)。

摘　　要：裂缝性礁灰岩强底水油藏孔、缝、洞发育,底水能量供应充足,由于裂缝发育的非均质性及裂缝产状类型的多样化,油井水锥规律非常复杂,亟需发展有效的控水措施。以流花11-1油田为例,基于岩心描述、铸体薄片分析和扫描电镜实验结果对储层进行分类,并建立不同储层机理模型,研究不同储层水平井水锥规律。在此基础上通过分析油井历史控堵水措施效果,针对性提出不同储层后期控堵水对策。研究结果表明,4类储层中致密裂缝型和孔洞裂缝型储层最易发生水锥,表现为油井见水快、含水率上升快、产量递减快;在现场已实施的3类控水措施中,“连续封隔体+流入控制装置(Inflow Control Device, ICD)”控水措施既能充填裂缝,又能降低高产能段流量,起到均衡控水的作用,现场应用效果最好。该项研究对于裂缝型底水油藏的高效开发具有重要意义,为该类油田的见水规律和控水对策提供借鉴。The fractured bottom water reef limestone reservoir is characterized by a well-developed fracture network and a large bottom aquifer.The heterogeneity of the fracture network and the diversity of fracture occurrences complicate water coning in production wells,necessitating adaptive water control technologies.This study uses the Liuhua 11-1 oilfield as a case study,where the reservoir s microscopic porous structure was categorized into four types based on core descriptions,rock core SEM,and cast rock thin sections.Numerical simulation models were developed to investigate the water coning characteristics of different reservoir types,and various water control methods were evaluated.The results show that distinct water coning behaviors across different reservoir types.Tight-fractured and cave-fractured reservoirs are prone to rapid water coning,leading to early water breakthrough,quick increases in water cut,and swift declines in oil production.Upon assessing the adaptability and effectiveness of existing water control measures,the“continuous packer+Inflow Control Device(ICD)”approach was found to be efficacious.This method not only fills the fractures but also reduces the flow rate in high-productivity sections to achieve water control balance.This research is of great significance for the efficient development of fractured bottom water reservoir,and provides reference for the water coning and water control method of this type of oilfield.

关 键 词：礁灰岩 储层分类 水锥规律 控水措施 

分 类 号：TE349[石油与天然气工程—油气田开发工程]