低渗透油藏CO_2驱开发效果影响因素分析  

Analysis of Influence Factors for Development Effect of CO_2 Flooding in Low Permeability Reservoirs

作　　者：李南 田冀 任仲瑛 郑强 

机构地区：[1]中海油研究总院开发研究院,北京100027 [2]北京石油机械厂,北京100083

出　　处：《油气井测试》2015年第4期7-10,75,共4页Well Testing

基　　金：国家973重大专项"CO2驱渗流力学理论"(2011CB707305-005);国家重大专项"海上油田丛式井网整体加密及综合调整技术"(2011ZX05024-002-006)内容

摘　　要：通过引入存气率、混相体积和混相效果等评判指标,采用实际动态和数值模拟相结合(动静结合)的手段,应用多元线性回归算法,建立了多因素筛选(序列)方法,完善了CO2驱混相程度评价方法,得到了影响开发效果的主控因素,为现场CO2驱方案的制定提供了一定的借鉴意义。结果表明,引入的存气率、混相体积和混相效果等参数,可以有效的评价混相开发效果;非均质程度对采出程度影响最为明显,其次是注入流体,影响较不明显的是原始地层压力;注入流体对混相效果影响最为明显,其次是原始地层压力,影响较不明显的是储层非均质程度。Through the introduction of judging indexes of gas storage rate,miscible volume and miscible effect,using the method combined with the actual dynamic and numerical simulation,applying multiple linear regression algorithm,a multi-factor screening(sequence)method has been built,the evaluation method of CO2 miscible flooding is improved,and the main control factors affecting development effect are obtained which provides a reference for planning the development of CO2 flooding.The results show that the gas storage rate,miscible volume and miscible effect can effectively evaluate the development effect of miscible;degree of heterogeneity has most obviously influence on oil recovery degree;secondly is the injective fluid;lastly is the original formation pressure;the injective fluid has most obviously influence on miscible effect effects;secondly is the original formation pressure,lastly is the reservoir heterogeneity.

关 键 词：低渗透油藏CO2驱 混相程度 影响因素 主控因素 

分 类 号：TE348[石油与天然气工程—油气田开发工程]