油气地质与采收率2025，Vol.32Issue(5)：46-54,9.DOI:10.13673/j.pgre.202402002
页岩油多组分烃-岩相互作用力学特征
Mechanical characteristics of interaction between rock and multi-component hydrocarbon in shale oil
摘要
Abstract
Interfacial effects and intermolecular forces dominate in shale nanopores,and the classical theory of continuum medium mechanics has limitations or even failures,thus becoming a key issue limiting the development of shale oil and gas storage and flow theories,as well as mathematical simulations.In order to address this issue,the interaction between alkane molecules in shale oil and graphene walls in shale nanopores and the adsorption/retention characteristics of multi-component alkanes in shale oil were studied.By using molecular dynamics simulation,single-component and multi-component systems of shale oil were constructed to analyze the adsorption behavior and retention phenomena of different alkane molecules in the pores,as well as the effects of van der Waals forces,pore sizes,and other factors on the strength of the interactions and the characteristics of adsorbed layers.The simulation results show that the interaction strength between alkane molecules and graphene walls increases nonlinearly with the increase in the number of carbon atoms in alkane molecules due to the irregularity of molecular arrangement and nonlinear van der Waals forces.In the single-component system of shale oil,the number of adsorption layers of alkane molecules increases with the increase in the interaction strength between alkane molecules and graphene walls,but the adsorption strength gradually decreases with the increase in the number of adsorption layers;in the multi-component system of shale oil,there are obvious component differentiation and heavy hydrocarbon retention phenomenon.关键词
页岩油/烃-岩相互作用/吸附特征/纳米级孔隙/重烃滞留Key words
shale oil/interaction between hydrocarbon and rock/adsorption characteristic/nanopore/heavy hydrocarbon retention分类
能源科技引用本文复制引用
孙文苑,王子怡,高澜恺,张晟庭,李靖,吴克柳,陈掌星..页岩油多组分烃-岩相互作用力学特征[J].油气地质与采收率,2025,32(5):46-54,9.基金项目
国家自然科学基金项目"深水稠油采出颗粒流固微观力学特征及在油水体系中迁移/稳定机理研究"(52304071),中国石油大学(北京)石油工程教育部重点实验室开放课题基金项目"页岩油地面集输过程颗粒界面运移特性多尺度建模研究"(2462024PTJS002). （52304071）
