CAJ | 학술논문

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。
유전개발과정중，유우저층내미립적변화，회도치저층삼수수착류체적주입축점발생변화。저층내수류체류동적미립재력적작용하회축점침적도공후벽면，인기공후유효반경치감소，도치저층삼투솔강저。위연구저층내류동미립적재공후내적침적규률급기영향인소，해문통과대류체중현부미립진행수력분석화이론추도，건립료미립침적수학모형，계산미립재공후내적운동궤적，득도료능구판별류체중미립발생침적적식별표준。통과민감성분석연구료미립립경、류체류속화류체점도삼개인소대미립침적적영향。모의결과표명：미립립경월대，미립월용역침적도공후벽면；류체류속월대，월불리우미립적침적；류체점도월대，류체대미립적현부능력월강，월불리우미립적침적。
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.