伊拉克Ahdeb油田注采井组连通性分析与应用  

Analysis and Application on the Communication of Injection/Production Well Group in Ahdeb Oilfield,Iraq

作　　者：张秦汶[1,2] 张烈辉 刘启国[1] 江有适[1] 崔力公[2] Zhang Qinwen;Zhang Liehui;Liu Qiguo;Jiang Youshi;Cui Ligong(Southwest Petroleum University,Chengdu,Sichuan 610500,China;CNPC Chuanqing Drilling Engineering Company Limited,Chengdu,Sichuan 610051,China)

机构地区：[1]西南石油大学,四川成都610500 [2]中国石油川庆钻探工程公司,四川成都610051

出　　处：《特种油气藏》2018年第4期72-75,共4页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金"三维大变化尺度缝洞型碳酸盐岩油藏流体流动规律及流-固耦合综合模型研究"(51374181)

摘　　要：针对伊拉克Ahdeb油田高渗带油藏注水开发效果差、注采井间连通性不明确、驱油规律复杂等问题,运用多元线性回归方法和物质平衡理论分析Ahdeb油田注水开发中高渗带对注水开发的影响,建立了井间连通系数计算模型,同时结合水驱特征曲线和含油率模型对未来注水开发进行预测优化。研究结果表明:在高渗带的影响下,AD1-11-2H井与4口相邻注水井的连通系数分别为0.21、0.14、0.12、0.31,通过不同的连通系数计算并提出了有效注水速度的概念。根据注采井组之间不同的有效注水量并结合水驱特征曲线和含油率模型对井组进行优化配注。AD1-11-2H井组优化配注1 a后,采出程度达12.5%,年采油速度为2%,综合含水率为57%,完成了开发方案目标。研究成果对非均质性较强的高渗带油藏注水开发具有重要的指导意义。The oil reservoirs with high permeability zones in Ahdeb Oilfield,Iraq are faced with poor water flooding effect,unclear injection-production well communication and complicated oil displacement laws.To solve these problems,the effects of high permeability zones on water flooding development of Ahdeb Oilfield were analyzed by means of multivariate linear regression method and material balance theory.Furthermore,the model for calculating the interwell communication coefficient was established and the future water flooding development was predicted and optimized based on the waterflood characteristic curve and the oil content model.It is shown that under the effect of high permeability zones,the communication coefficient between Well AD1-11-2H and its adjacent water injectors is 0.21,0.14,0.12 and 0.31,respectively.After the communication coefficients were calculated,the concept of equivalent water injection rate was proposed.The injection allocation of injection/production well group was optimized based on effective water injection volume between different injection/production well groups,combined with waterflood characteristic curve and oil content model.One year after the optimized injection allocation in Well group AD1-11-2H,the degree of reserve recovery is 12.5%,yearly oil production rate is 2%and composite water cut is 57%.Obviously,the target of development scheme is achieved.The research results can be used as the reference for the water flooding development of strongly heterogeneous oil reservoirs with high permeability zones.

关 键 词：高渗带油藏 井间连通性 多元线性回归 物质平衡理论 伊拉克Ahdeb油田 

分 类 号：TE349[石油与天然气工程—油气田开发工程]