疏松砂岩油藏微粒运移机理研究  

Study on the Mechanism of Particle Migration in Loose Sandstone Reservoirs

作　　者：范佳乐 侯亚伟 蔡晖 刘博伟 许万坤 FAN Jiale;HOU Yawei;CAI Hui;LIU Bowei;XU Wankun(Bohai Petroleum Research Institute,Tianjin Branch of CNOOC(China),Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459

出　　处：《重庆科技学院学报（自然科学版）》2023年第5期33-39,共7页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：“十四五”国家科技重大专项“海上油田大幅度提高采收率关键技术”子课题“海上双高-双特高水驱油田提高采收率油藏关键技术”(KJGG2021-0501)。

摘　　要：为进一步明确地层微粒运移与堵塞的主控因素,采用激光雕刻技术建立岩心铸体薄片模型并进行微粒运移模拟实验,基于计算流体力学–离散单元法分析孔喉内微粒的运移规律。研究表明,由于油井近井地带存在持续微粒源,微粒可通过运移在多孔介质中不均匀滞留或沉降,进而造成孔喉和孔隙堵塞。同时,在多孔介质中微粒的浓度对其滞留堵塞的影响较小,粒喉直径比为影响微粒堵塞的主控因素。In order to further clarify the main controlling factors of formation particle migration and plugging,the laser engraving technology was used to establish the core casting slice model and carry out particle migration simulation experiments.Based on computational fluid dynamics-discrete element method,the migration law of particles in the pore throat was analyzed.The research shows that due to the existence of continuous particle sources near the well,particles can be unevenly retained or settled in porous medium through migration,resulting in pore throat and pore plugging.At the same time,the concentration of particles in porous medium has little effect on its retention plugging,and the particle size-throat ratio is the main control factor affecting particle plugging.

关 键 词：疏松砂岩 微粒运移 计算流体力学-离散单元法 孔隙结构 激光雕刻模型 

分 类 号：TE357[石油与天然气工程—油气田开发工程]