非均相体系在微通道中的封堵性能研究  

Study on plugging performance of heterogeneous systems in microchannels

作　　者：夏惠芬[1,2] 杨坤[1,2] 李坤龙 蒋丽丽 刘洋[1,2] XIA Huifen;YANG Kun;LI Kunlong;JIANG Lili;LIU Yang(Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education,Northeast Petroleum University,Daqing City,Heilongjiang Province,163318,China;National Virtual Simulation Experimental Teaching Center of Petroleum and Natural Gas Engineering(Northeast Petroleum University),Daqing City,Heilongjiang Province,163318,China)

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]石油与天然气工程国家级虚拟仿真实验教学中心(东北石油大学),黑龙江大庆163318

出　　处：《油气地质与采收率》2024年第1期119-125,共7页Petroleum Geology and Recovery Efficiency

基　　金：国家自然科学基金项目“黏弹性乳状液滴微观渗流机理及耦合模型”(12002083)。

摘　　要：基于大庆油田天然岩心孔隙尺度分布特征建立了微通道模型,考虑非均相体系中的分散相和连续相的变形及流动特征,以相场法建立流动模型并用有限元方法求解,模拟了分散相颗粒在微通道内的生成,并实现了颗粒分选,研究了微观孔喉结构中匹配系数和孔喉比对颗粒封堵性能的影响。结果表明,颗粒在微观孔喉结构中发生弹性封堵时,孔喉入口处压力随颗粒运移通过而呈现周期性变化;颗粒与孔喉最佳匹配系数为[1.0,1.4),此区间内颗粒能够在孔喉入口处暂时封堵,变形运移通过孔喉后恢复原形;当孔隙直径相同时,匹配系数和孔喉比越大,颗粒通过压力越大;颗粒粒径越大,颗粒通过压力临界值越小。This paper establishes a microchannel model based on the pore scale distribution characteristics of natural cores from Daqing Oilfield.It considers the deformation and flow characteristics of the dispersed and continuous phases in the heterogeneous system,builds a flow model by the phase field method,and solves it by the finite element method.The paper also simulates the gen-eration of dispersed phase particles in the microchannel,realizes particle sorting,and studies the effect of the matching coefficient and pore-throat ratio on the plugging performance of particles in the microscopic pore-throat structure.The results show that when the particles are elastically plugged in the microscopic pore-throat structure,the pressure at the entrance of the pore throat changes periodically with the migration of the particles through the pore throat.The optimal matching coefficient between the particles and the pore throat is[1.0,1.4).In this interval,the particles can be temporarily plugged at the entrance of the pore throat and recover their original shape after deformation and migration through the pore throat.When the pore diameter is the same,a larger matching coefficient and pore-throat ratio indicate greater pressure of particles through the pore throat,and larger particle size reflects a smaller critical value of particles through the pore throat.

关 键 词：非均相体系 相场法 封堵性能 孔喉比 匹配系数 

分 类 号：TE345[石油与天然气工程—油气田开发工程]