摘要
影响特高含水油藏剩余油可采潜力的因素极其复杂,且各因素的影响程度差异明显,常规方法多以剩余油饱和度或剩余油储量丰度等单一指标评价剩余油潜力,难以有效指导特高含水油藏剩余油挖潜。在充分考虑特高含水油藏剩余油可采潜力影响因素的基础上,综合表征储层非均质性、剩余油可采储量规模、水淹状况以及油水分流能力的差异,构建了特高含水油藏剩余油可采潜力量化评价指标体系,并考虑不同指标对剩余油可采潜力控制程度的差异,将加速遗传算法与投影寻踪模型相结合来确定各评价指标的客观权重,从而构建了剩余油可采潜力指数,形成特高含水油藏剩余油可采潜力量化评价新方法。以渤海Q油田南区主力产层NmIL砂体为例,开展特高含水油藏剩余油可采潜力量化评价,结果表明,新方法可综合表征不同区域位置的储层物性、可采储量丰度和油水分流能力对剩余油可采潜力的影响,实现了主力产层NmIL砂体剩余油可采潜力分布的差异化定量评价,优势可采潜力区域刻画明显,将其作为NmIL砂体下一步井网加密调整潜力区域,以精准指导加密水平井的部署,为特高含水油藏剩余油挖潜提供了一种全新的分析方法与思路。
The factors affecting the remaining oil recoverable potential in ultra-high water-cut reservoirs are extremely complex,ex-hibiting substantial variations in their impact.Conventional methods often rely on singular indicators such as remaining oil satura-tion or remaining oil abundance to assess remaining oil recoverable potential,which fails to guide tapping remaining oil in ultra-high water-cut reservoirs effectively.By considering the factors affecting the remaining oil recoverable potential in these reservoirs and comprehensively characterizing the heterogeneity of reservoirs,the scale of remaining oil reserves,watered conditions,and oil/water flow capacity,we constructed a quantitative assessment indicator system to tap the remaining oil recoverable potential in ultra-high water-cut reservoirs.In addition,according to the control degree difference of the indicators on remaining oil recoverable po-tential,we determined the objective weights of each evaluation indicator by combining the accelerated genetic algorithm and the projection pursuit model.We constructed the remaining oil recoverable potential index to form a new quantitative assessment method of the remaining oil recoverable potential in ultra-high water-cut reservoirs.Taking the NmIL sand body of the main produc-tion layer in the south area of Bohai Q Oilfield as an example,we quantitatively assessed the remaining oil recoverable potential in ultra-high water-cut reservoirs.The results reveal that the new method can comprehensively characterize the effects of reservoir physical properties,remaining oil reserves,and dynamic characteristics of oil/water flow on the remaining oil recoverable potential in different locations and realize the differential quantitative assessment of the distribution of remaining oil recoverable potential in NmIL sand body of the main production layer.In addition,the dominant recoverable potential area is clearly characterized,and it is taken as the potential area for the subsequent adjustment of infill wells in the NmIL sand body to accurately guide the deployment of infill horizontal wells,thereby offering a novel perspective for tapping remaining oil resources in such reservoirs.
作者
刘晨
冯其红
何逸凡
张先敏
周文胜
LIU Chen;FENG Qihong;HE Yifan;ZHANG Xianmin;ZHOU Wensheng(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao City,Shandong Province,266580,China;State Key Laboratory of Offshore Oil Exploitation,Beijing City,100028,China;CNOOC Research Institute Co.,Ltd.,Beijing City,100028,China;CNOOC(China)Tianjin Branch,Tianjin City,300459,China)
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2024年第1期137-144,共8页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项“海上稠油油田开发模式研究”(2016ZX05025-001)
中海油重大科技项目“海上‘双高-双特高’水驱油田提高采收率油藏关键技术”(KJGG2021-0501)。
关键词
特高含水期
剩余油
可采潜力指数
投影寻踪
优势潜力丰度
ultra-high water-cut period
remaining oil
recoverable potential index
projection pursuit
dominant recoverable poten-tial abundance
作者简介
刘晨(1985-),男,山东日照人,高级工程师,博士,从事油田开发方面的研究工作。E-mail:liu099339@163.com;通信作者:冯其红(1969-),男,四川西充人,教授,博导。E-mail:fengqihong@126.com。
