页岩油微尺度流动油-固界面黏附作用机制  

Mechanism of oil-solid interface adhesion in micro-scale flow within shale oil reservoirs

作　　者：刘晓宇 黄振凯 昝灵[3] 姜志高[3] 牛骏 伦增珉 LIU Xiaoyu;HUANG Zhenkai;ZAN Ling;JIANG Zhigao;NIU Jun;LUN Zengmin(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing City,102206,China;SINOPEC Petroleum Exploration and Production Research Institute,Beijing City,102206,China;SINOPEC East China Oil&Gas Company,Nanjing City,Jiangsu Province,210019,China)

机构地区：[1]页岩油气富集机理与高效开发全国重点实验室,北京102206 [2]中国石化石油勘探开发研究院,北京102206 [3]中国石化华东油气分公司,江苏南京210019

出　　处：《油气地质与采收率》2025年第2期51-59,共9页Petroleum Geology and Recovery Efficiency

基　　金：国家自然科学基金项目“陆相泥页岩层系成岩热演化过程中有机无机相互作用及其对储集空间形成演化的影响”(42272142);“陆相富有机质页岩成烃动态演化与烃类赋存机理”(42090022);中国石化科技部项目“页岩油开发实验关键技术研究与应用”(P24159)。

摘　　要：针对中国苏北盆地溱潼凹陷阜宁组二段(阜二段)泥页岩储层,系统探讨了页岩油在微尺度流动油-固界面的黏附作用机制。通过详细分析泥页岩的矿物组成、孔隙结构及流体特征,结合原子力显微镜和激光共聚焦显微镜技术,揭示不同类型页岩中页岩油流动规律和油-固界面黏附作用机制。研究结果表明,页岩油在压力驱动下储层内呈现出明显的分组分动用特征,轻质组分优先动用吸附至页岩壁面,显著增强了油-固界面的黏附力,且随着压力增加,重质组分开始流动,并进一步提升了黏附力,但压力超过5MPa后黏附力趋于稳定。油-固界面黏附力测试表明,在低压条件下纹层状泥岩和块状粉砂质泥岩是提高页岩油采收率的重点类型;而在高压条件下,纹层状泥岩对页岩油的吸附和解吸附作用机制成为未来提高溱潼凹陷阜二段页岩油采收率的关键研究方向。This study focused on the mud shale reservoirs in the second Member of Funing Formation in Qintong Sag,Subei Basin of China,and systematically investigated the oil-solid interface adhesion mechanism of shale oil in micro-scale flow.Through detailed analysis of the mineral compositions,pore structures,and fluid characteristics of shale,the flow patterns of shale oil and the oil-solid interface adhesion mechanism in different types of shale were revealed by atomic force microscopy(AFM)and laser confocal microscopy.The findings indicate that shale oil in the reservoir exhibits distinct characteristics of selective production driven by pressure,whereby light components are preferentially adsorbed onto the shale walls,significantly enhancing the adhesion at the oil-solid interface.As pressure increases,heavy components start to flow,further augmenting the adhesion,but they stabilize once pressures exceed 5 MPa.Adhesion tests at the oil-solid interface demonstrate that laminated mudstone and massive silty mudstone emerge as key target shale types for enhancing shale oil recovery under low-pressure conditions.Under high-pressure conditions,the mechanism of adsorption and desorption of shale oil by laminated mudstone becomes the key research area for improving shale oil recovery in the second Member of Funing Formation in Qintong Sag.

关 键 词：页岩油 微尺度流动 油-固界面 黏附作用 溱潼凹陷 

分 类 号：TE122.2[石油与天然气工程—油气勘探]