西安石油大学学报（自然科学版）2024，Vol.39Issue(3)：72-81,10.DOI:10.3969/j.issn.1673-064X.2024.03.009
致密油藏CO2驱和水驱分子动力学模拟及微观机理
Study of Microscopic Mechanism of CO2/Water Flooding in Tight Oil Reservoir Based on Molecular Dynamics Simulation
摘要
Abstract
In order to clarify the micro oil displacement mechanisms of CO2 flooding and water flooding,the CO2 and water oil displace-ment models are established respectively using molecular dynamics simulation method.The variation laws of density of crude oil in hy-drophilic nanopores with displacement time under different displacement conditions were studied,and the migration process of hydrocar-bon molecules in nanopores during oil displacement was analyzed.The research results indicate that as the injection rate increases,the oil displacement efficiency of both oil displacement media increases.During CO2 flooding,when the injection rate is low,the expansion of CO2 plays a major role;As the injection rate increases,displacement gradually plays a dominant role.In the process of water flooding,when the injection rate is low,imbibition plays a major role in hydrophilic nanopores.At this time,the displacement rate of crude oil in small pores is faster than that in large pores;As the injection rate increases,displacement gradually plays a dominant role,and the crude oil in the large pores is rapidly displaced.关键词
CO2驱油/水驱油/分子动力学/致密油藏Key words
CO2 flooding/water flooding/molecular dynamics/tight oil reservoir分类
能源科技引用本文复制引用
黄鑫淼,林伟,韩登林,雷征东,赵新礼..致密油藏CO2驱和水驱分子动力学模拟及微观机理[J].西安石油大学学报（自然科学版）,2024,39(3):72-81,10.基金项目
国家自然科学基金面上项目"陆相页岩油注二氧化碳吞吐提高采收率机理研究"(51974356) （51974356）
湖北省自然科学基金青年面上项目"盐间页岩油储层多尺度孔隙结构表征"(2021CFB182) （2021CFB182）
中国石油科技创新基金项目"页岩油储层多尺度储集空间结构特征和纳米受限流体的数值模拟研究"(2022DQ02-0102) （2022DQ02-0102）
