不同类型油藏非均相驱均衡驱替方式及效果评价  

Balanced displacement methods and effect evaluation of heterogeneous combination flooding in different reservoirs

作　　者：吴德君 侯健[2] 刘丽杰 周康[3] 安志斌 WU Dejun;HOU Jian;LIU Lijie;ZHOU Kang;AN Zhibin(Exploration and Development Research Institute,Shengli Oilfield,Dongying 257000,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,东营257000 [2]中国石油大学(华东)石油工程学院,青岛266580 [3]山东科技大学能源与矿业工程学院,青岛266590

出　　处：《工程科学学报》2025年第3期419-429,共11页Chinese Journal of Engineering

基　　金：中国石化股份公司重大资助项目(P23248);中国石化股份公司课题资助项目(P22021,P24039)。

摘　　要：非均相驱协同矿场调整措施在孤岛油田中一区Ng3单元取得了良好的降水增油效果.然而,由于实际地层非均质性复杂、层间井网部署的差异及不同层位化学剂注入量不同,非均相驱在动用平面和纵向分布剩余油的过程中会相互影响,很难明确不同方式均衡驱替贡献力度,难以阐明不同类型剩余油的动用机制.为此,本文采用数值模拟方法,基于目标区块实际地层参数,建立了五种不同类型剩余油油藏机理模型,通过受效剩余油分布、洗油效率、波及系数、平面含水饱和度变异系数及纵向吸水不均衡系数等指标,评价了非均相驱平面及纵向均衡驱替效果,阐明了剩余油动用机制.数值模拟研究表明,非均相驱协同井网调整或分层配注等矿场调整措施,能最大程度扩大波及、提升均衡驱替效果.针对不同类型剩余油油藏,明确了均衡驱替方式贡献力度及实施优先级,实际应用时应根据油藏类型和矿场实施条件,选取适宜的均衡驱替方式.本研究为矿场非均相驱动用不同类型剩余油提供了合理的解释,对非均相驱在矿场不同类型油藏的进一步推广应用提供参考.The synergistic oil production using heterogeneous combination flooding and field adjustment measures achieved good results in increasing oil production and decreasing water cut in the Ng3 block of the Gudao Oilfield.However,because of the complex heterogeneity of the actual formation,differences in the deployment of interlayer well networks,and different injection volumes of chemical agents in different layers,the extraction of planar and vertical remaining oil by heterogeneous combination flooding is affected.Clarifying the contributions of different balanced displacement methods and elucidating the mechanism of extracting the different types of remaining oil are difficult.Therefore,this study establishes five different types of models for remaining oil reservoirs based on the actual formation parameters of target blocks using reservoir numerical simulations.The remaining oil,extracted remaining oil,oil displacement efficiency,sweep coefficient,planar water saturation variation coefficient,and vertical water absorption imbalanced coefficient are used to evaluate the balanced displacement effects of heterogeneous combination flooding.On this basis,the mechanism of the remaining oil extraction was elucidated.The numerical simulation results show that field adjustment measures such as well network adjustment and layered injection allocation for heterogeneous combination flooding can maximize the balanced displacement effect.For different types of remaining oil reservoirs,the priority of implementing balanced displacement methods was clarified.In practical applications,suitable balanced displacement methods should be selected based on the type of reservoir and conditions of the field implementation.In reservoirs with developed high-permeability zones,heterogeneous combination flooding effectively creates advantageous channels for water flow.Meanwhile,well network infilling can increase the swept volume of heterogeneous combination flooding in low-permeability areas and enhance the displacement efficiency of the enr

关 键 词：非均相驱 均衡驱替 剩余油动用 数值模拟 井网调整 分层配注 

分 类 号：TG142.71[一般工业技术—材料科学与工程]