基于数字化孔隙模型的聚驱后微观剩余油定量表征  

Quantitative characterization of micro residual oil after polymer flooding based on digital pore model

作　　者：刘洋[1,2] 夏惠芬 张思琪[3] 吴景春 蒋丽丽[1] 杨坤 李坤龙[1] LIU Yang;XIA Huifen;ZHANG Siqi;WU Jingchun;JIANG Lili;YANG Kun;LI Kunlong(Key Laboratory of Enhanced Oil and Gas Recovery(Northeast Petroleum University),Ministry of Education,Daqing 163318,China;China National Oil and Gas Exploration and Development Company Limited,Beijing 10000,China;Geological Institute of No.5 Oil Production Plant in Daqing Oilfield Company Limited,Daqing 163513,China)

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]中国石油国际勘探开发有限公司,北京100034 [3]大庆油田有限责任公司第五采油厂地质研究所,黑龙江大庆163513

出　　处：《中国石油大学学报（自然科学版）》2023年第6期111-120,共10页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(12002083)。

摘　　要：利用岩心压汞试验数据和CT扫描数据,构建波纹管状数字化孔隙模型,考虑聚合物溶液的黏弹性、不可及孔隙体积及吸附滞留特性,模拟不同驱油体系在该孔隙模型中的驱油过程,定量表征不同驱油体系的驱油效果及对不同类型剩余油的作用。结果表明:构建的数字化孔隙模型可以较好地模拟岩心孔隙度和渗透率,其相对偏差均小于5.0%;基于数字化孔隙模型计算的水驱及聚驱后采收率与岩心驱油试验结果的相对偏差分别为1.32%和0.97%;计算的聚驱后各类剩余油饱和度与岩石薄片荧光分析方法得到的结果接近,水驱后及聚驱后剩余油含量较高的为膜状剩余油和簇状剩余油,占剩余油比例超过85%。On the Basis of the core mercury injection test data and CT core scanning data,a corrugated tubular digital pore model was constructed.Considering the viscoelasticity,inaccessible pore volume,and adsorption retention characteristics of polymer solution,the oil displacement process of different oil displacement fluids in the pore model was simulated.The oil displacement effects and their effects on different types of remaining oil were quantitatively characterized.It is indicated that the constructed digital pore model can effectively simulate core porosity and permeability,and the relative deviations is less than 5.0%.The relative deviations between the recovery efficiency of water flooding and polymer flooding calculated based on the digital pore model and the results of oil displacement experiments in the core are 1.32%and 0.97%respectively.The saturation of various types of residual oil after polymer flooding is similar to the results obtained by the fluorescence analysis method of rock thin sections.After water flooding and polymer flooding,the remaining oil in film form and cluster form is more,accounting for more than 85%of the remaining oil.

关 键 词：数字化 孔隙模型 聚合物 剩余油 定量表征 含油饱和度 

分 类 号：TE53[石油与天然气工程—油气田开发工程]