水驱砂岩油藏储层物性时变规律分析方法综述  

Review of Analysis Methods of Petro-physical Properties Time-varying Law in Water Drive Sandstone Reservoirs

作　　者：谢倩 刘尚奇[1] 王瑞峰[1] 杨轩宇 XIE Qian;LIU Shang-qi;WANG Rui-feng;YANG Xuan-yu(PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China)

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《科学技术与工程》2023年第29期12354-12361,共8页Science Technology and Engineering

基　　金：中国石油集团科技项目(2021DJ3201)。

摘　　要：油田水驱开发以来,受注入水影响,储层物性变化较大。砂岩油藏具有非均质性强、黏土含量高等特点,经过多年注水冲刷以及开采后期油水重力分异作用影响,储层易形成局部优势渗流通道,地下渗流场发生很大变化,进而影响油藏开发后期油水运动和剩余油分布规律。依据初始储层物性参数已不能有效指导开发后期工作。为全面了解水驱油田储层物性变化研究方法及应用情况,寻找适合不同油田开发后期适用性技术方法,进行了大量调研,认为通过采用取心资料分析、驱替实验、孔隙网络模型、孔喉结构分形表征等方法,可从微观角度对孔喉特征参数进行描述,是研究储层微观物性变化的重要手段;而借助密闭取心、水驱油实验、数值模拟技术可定量表征储层参数变化,是研究储层宏观参数变化的重要手段。通过总结砂岩储层时变分析各方法的优势及存在问题,以期在实际应用中采用合理方法研究储层参数时变规律,精准刻画不同流动单元内物性参数变化,建立动态地质模型,精确模拟开发中后期油田剩余油分布,为油田开发调整提供可靠依据。In water flooding oilfields,the injected water has a significant impact on the reservoir physical properties.Sandstone reservoirs have strong heterogeneity and high clay content.After years of water flooding and the gravity differentiation of oil and water in the later stage of development,the reservoir is easy to form a local preferential flow path,and the underground seepage field has changed greatly,which further affects the oil and water movement and the remaining oil distribution in the later stage of reservoir deve-lopment.The initial petro-physical parameters can't be used to effectively guide the later development plan.A large number of investigations have been carried out in order to fully review the research methods and application of time-varying petro-physical properties in water drive reservoirs,and find suitable methods for different reservoirs in the later development stage.Coring data analysis,displacement experiment,pore network model,pore throat structure fractal characterization and other methods can be used to describe the pore throat characteristic parameters from a microscopic perspective,which are important means to study the changes of microscopic petro-physical properties.Sealed core analysis,water flooding experiment and numerical simulation technology can quantitatively characterize the changes of reservoir parameters,which are important means to study the changes of reservoir macro parameters.By summarizing the advantages and existing problems of various methods of reservoir properties time-varying analysis,it is expected to use reasonable methods to study the time-varying law of reservoir parameters in practical applications,accurately depict the changes of physical parameters in different flow units,establish dynamic geological models,accurately simulate the distribution of residual oil in the later stages of development,and provide reliable basis for oilfield development adjustment.

关 键 词：水驱开发 孔隙结构 孔隙网络 分形表征 储层物性时变 数值模拟软件 

分 类 号：TE343[石油与天然气工程—油气田开发工程]