多孔介质内流动微粒沉积规律研究  

Study of the deposition laws for particles flowing in porous media

作　　者：冯其红[1] 王相[1] 韩晓冬 王波[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,青岛266580 [2]中海油天津分公司

出　　处：《水动力学研究与进展（A辑）》2015年第4期401-405,共5页Chinese Journal of Hydrodynamics

基　　金：国家科技重大专项"海上稠油油藏高含水期剩余油分布机理研究"(2011ZX05024-002-002);国家自然科学基金"基于颗粒物质力学的储层参数变化流固耦合模拟方法"(51474233)~~

摘　　要：油田开发过程中,由于储层内微粒的变化,会导致储层参数随着流体的注入逐渐发生变化。储层内随流体流动的微粒在力的作用下会逐渐沉积到孔喉壁面,引起孔喉有效半径值减小,导致储层渗透率降低。为研究储层内流动微粒的在孔喉内的沉积规律及其影响因素,该文通过对流体中悬浮微粒进行受力分析和理论推导,建立了微粒沉积数学模型,计算微粒在孔喉内的运动轨迹,得到了能够判别流体中微粒发生沉积的识别标准。通过敏感性分析研究了微粒粒径、流体流速和流体黏度三个因素对微粒沉积的影响。模拟结果表明:微粒粒径越大,微粒越容易沉积到孔喉壁面;流体流速越大,越不利于微粒的沉积;流体黏度越大,流体对微粒的悬浮能力越强,越不利于微粒的沉积。During the development process of oil reservoirs, the variation of the particles in reservoir may result in the change of the formation parameter, such as the permeability and porosity. The particles flowing in the porous media would deposit on the surface of the pores and throats under the effect of different forces which will result in the decrease of the effective radius value and the permeability of the formation. For studying the deposition laws of the particles flowing in porous media and its influential factors, a mathematical model of particles deposition is built based on force analysis and the theoretical derivation. The trajectory of the particle could be calculated and the criterion for judging the deposition of the particle in pore-throats is obtained. Besides, sensitive analysis is also conducted for analyzing the effects of the particle radius, fluid rate and fluid viscosity on the particle deposition. The simulation results indicates that particles are more likely to deposit with the increase of the particle size;the larger of flow rate, the more difficult for particles deposition, and the greater viscosity of the fluid, the more detrimental for particles depositing on the pore-throat surface.

关 键 词：微粒运移 微粒沉积 受力分析 运动轨迹 流动能力 

分 类 号：TE319[石油与天然气工程—油气田开发工程]