高含水油藏注水层段划分及注采液量调配协同优化设计方法  

Collaborative optimization design method for water injection layer division and injection-production fluid allocation in high water cut reservoirs

作　　者：张先敏[1] 李闪闪 冯其红[1] 刘晨[1,2,3] 刘向斌 ZHANG Xianmin;LI Shanshan;FENG Qihong;LIU Chen;LIU Xiangbin(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;Oil Production Engineering Research Institute of Daqing Oilfield Co.,Ltd.,PetroChina,Daqing City,Heilongjiang Province,163453,China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]海洋石油高效开发国家重点实验室,北京100028 [3]中海油研究总院有限责任公司,北京100028 [4]中国石油大庆油田有限责任公司采油工程研究院,黑龙江大庆163453

出　　处：《油气地质与采收率》2025年第2期142-151,共10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)。

摘　　要：精细分层注水是高含水油藏提高采收率的重要手段,但其层段划分和配注量设计通常脱节,难以最大限度地发挥工艺协同效应。为此,在分层注水最佳层段划分数目未知的条件下,以经济净现值最大化为目标,考虑多种工程地质条件约束,构建了集注水层段划分组合及注采液量调配于一体的精细分层注水优化数学模型,并结合蜣螂优化算法,形成了高含水油藏注水层段划分及注采液量调配协同优化设计方法,实现精细分层注水关键工艺参数的一体化优化设计。以Egg模型为例,在维持注采总液量相同的条件下,对比了单一的各井注采液量优化、单一的分层注水措施参数优化以及两者一体化精细优化等3种方式下的调控效果。对比结果表明,对于层间物性干扰严重的高含水油藏,采用一体化精细优化方式,对分层注水井的层段划分方式、配注量及其他各井的注采液量调配进行协同优化,其效果显著优于单一注采液量优化或分层注水措施参数优化方式;一体化精细优化通过自动划分重组注水层段、智能匹配调整注采液量参数,有效缓解了高含水阶段的层间矛盾,优化水驱流场,实现各油层的均衡驱替,预测生产5a,采收率较优化前提高1.08个百分点。Fine layered water injection is a crucial method to enhance oil recovery in high water cut reservoirs.However,the design of water injection layer division and injection-production fluid allocation often lacks coordination,limiting the full realization of process synergy.To address this,under the condition of an unknown optimal number of water injection layers,a mathematical model of fine layered water injection optimization was developed.This model aimed to maximize economic net present value while considering multiple engineering and geological constraints,integrating water injection layer division and injection-production fluid allocation into a unified framework.By leveraging the Dung Beetle Optimizer,a collaborative optimization design method for water injection layer division and injection-production fluid allocation in high water cut reservoirs was proposed,enabling the integrated optimization design of key parameters for fine layered water injection.Using the Egg model as an example,this study compared the effects of three approaches:standalone optimization of injection-production fluid allocation,standalone optimization of layered wa‐ter injection parameters,and integrated fine optimization.The results indicate that for high water cut reservoirs with severe inter‐layer physical property interference,the integrated fine optimization approach significantly outperforms the other standalone meth‐ods by optimizing layer division of layered water injection wells,fluid allocation,and injection-production fluid allocation of other wells.Through automatic layer division and reorganization of water injection layers,coupled with intelligent matching and adjust‐ment of injection-production parameters,the approach effectively alleviates interlayer conflicts during the high water cut stage,op‐timizes the flow fields,and achieves balanced displacement across layers.Over a 5-year production forecast,this approach im‐proves the recovery factor by 1.08 percentage points compared to the pre-optimization scenario

关 键 词：高含水 分层注水 层段划分 蜣螂优化算法 协同优化 

分 类 号：TE341[石油与天然气工程—油气田开发工程]