摘要
结合实验与理论计算,分析纳米乳液的组装结构和稳定性,通过能量最小化结构优化和分子动力学模拟,考察柠檬烯纳米乳液在油藏沥青质和胶质中的行为,探讨柠檬烯纳米乳液驱油剂的作用机制。结果表明:柠檬烯分子的强疏水性和非平面结构在驱油过程中发挥关键作用,其疏水特性促进表面活性剂组装成高度稳定且尺寸较小的纳米胶束,从而有效减少地层对纳米乳液的吸附损失,扩大波及体积。此外,柠檬烯的非平面结构使其在分子间不规则碰撞中灵活旋转,能够深入渗透至稠油中的沥青质和胶质,并通过π—π相互作用解离这些组分的缔合作用,降低稠油黏度,增强流动性和剥离性能,从而显著提高原油采收率。这些发现为深入理解纳米乳液驱油剂的增产机制提供了新视角,并为开发更高效的纳米驱油剂提供了重要参考。
Combined with experiment and theoretical calculation,the assembly structure and stability of nanoemulsion were analyzed.Through structural optimization of energy minimization and molecular dynamics simulation,the behavior of limonene nanoemulsion in asphaltene and resin of reservoir was investigated,and the stimulation mechanism of limonene nanoemulsion oil displacement agent was discussed.The results indicate that the strong hydrophobicity and non-planar structure of limonene molecules play a crucial role in the oil recovery process.Its hydrophobic properties promote the surfactant to assemble into highly stable and small-sized nano-micelles,thus effectively reducing the adsorption loss of the stratum to the nanoemulsion in the reservoir and expanding the sweep volume.Additionally,the non-planar structure of limonene allows it to rotate flexibly during irregular molecular collisions,enabling deep penetration into the asphaltene and resin within heavy oil.Throughπ—πinteractions,limonene disrupts the aggregation of these components,reducing the viscosity of heavy oil,enhancing fluidity and detachment properties,and thereby significantly improving oil recovery rates.These findings offer new insights into the enhanced oil recovery mechanisms of nanoemulsion-based agents and provide important references for the development of more efficient nanoemulsion-based oil recovery agents.
作者
李建阁
LI Jiange(Production Technology Institute,Daqing Oilfield Co.,Ltd,Daqing 163453,China;Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation,Daqing Oilfield Co.,Ltd,Daqing 163453,China;National Key Laboratory for Multi-resource Collaborated Green Development of Continental Shale Oil,Daqing Oilfield Co.,Ltd,Daqing 163453,China)
出处
《安徽工业大学学报（自然科学版）》
CAS
2024年第5期483-489,共7页
Journal of Anhui University of Technology（Natural Science）
关键词
分子动力学
纳米乳液
柠檬烯
驱油剂
沥青质
降黏
油藏
采收率
molecular dynamics
nanoemulsion
limonene
oil recovery agent
asphaltene
viscosity reduction
reservoir
recovery ratio
