摘要
根据聚合物驱油实验反演岩心孔隙度、渗透率的非均匀分布以及聚合物驱油机理模型参数对认识岩心的非均质性、聚合物驱油机理及二者之间的定量关系具有重要的意义.聚合物驱驱油机理复杂,具有很强的非线性,常规室内岩心驱油实验分析技术无法描述岩心非均质性,也很难测量得到聚合物黏浓关系、相对渗透率曲线等驱油机理参数.引入迭代集合卡尔曼滤波方法(EnKF),在岩心聚合物驱油实验的基础上,自动反演了岩心孔隙度、渗透率非均匀场、油水相对渗透率曲线及聚合物驱相关驱油模型参数.反演得到岩心模型参数均值与传统方法得到结果具有较好的一致性,基于模型参数的驱油计算结果与实际驱油实验结果具有很好的一致性.模型参数的量化表征可为聚合物驱油藏的有效开采提供基础.
According to the polymer flooding experiment, the inversion of non-uniform distribution of core porosity, permeability and polymer flooding mechanism model parameters is important for understanding the heterogeneity of the core, the mechanism of polymer flooding and the quantitative relationship between the two. The polymer flooding mechanism is complex which has strong nonlinearity. The conventional core flooding experimental analysis technique cannot describe the core heterogeneity. And it is difficult to measure the flooding parameter, such as the polymer viscosity-carrying relationship and relative permeability curve. So the iterative ensemble Kalman filter was introduced. Based on polymer flooding experiment, the core porosity, permeability non-uniform field, oil-water relative permeability curve and polymer flooding related displacement model parameters were obtained by the iterative EnKF automatic inversion. Core model parameter mean got by the automatic inversion has good consistency with the results of the traditional calculation methods. The flooding calculation results based on the model parameters have good similarity with actual oil displacement test results. The quantitative characterization of model parameters could offer basis to the effective mining of polymer flooding reservoirs.
作者
胡冰艳
陈旭
寇根
李琼
刘勇
安科
HU Bing-yan;CHEN Xu;KOU Gen;LI Qiong;LIU Yong;AN Ke(Xinjiang Laboratory of Petroleum Reserve in Conglomerate,Xinjiang Karamay 834000,China;Research Institute of Experiiment and Detection of Xinjiang Oilfield Company,Xinjiang Karamay 834000,China;Science College,China University of Petroleum (East China),Shandong Qingdao 266580,China)
出处
《地球物理学进展》
CSCD
北大核心
2018年第6期2330-2335,共6页
Progress in Geophysics
基金
新疆砾岩油藏实验室开放性项目(2015KL032
2017D04023)资助
关键词
迭代集合卡尔曼滤波
聚合物驱油
孔渗参数
吸附
相对渗透率
iterative EnKF
polymer flooding
permeability and porosity parameters
adsorption
relative permeability
