摘要
根据前人实验研究成果 ,建立黏弹效应本构方程 ;以临界德博拉数法和临界黏弹流速法作为发生黏弹效应门限的判断方法 ,建立考虑黏弹效应的数学模型 ,提出了相应数值计算方法。用编制的软件 ,结合大庆油田聚合物驱实际 ,以对比计算方法研究了黏弹效应对聚合物驱油效果的影响 ,结果表明 :聚合物驱油过程中的黏弹现象常发生于注入井与生产井的近井区域 ,能够起到提高采收率、降低含水率、抑制高渗层水淹的良好驱油效果。对比黏弹模型与原模型的分层吸水、产油、产液量变化 ,认为利用黏弹效应开发中、低渗层 ,可使之成为增产主力 ;生产井附近的黏弹效应可使中、高渗层产油能力反弹 ,能够提高驱油效率。图 1表 3参 7(黎洪摘 )
In this project, based on laboratory research, constitutive equation of viscoelastic effect was determined, the critical Deborah number and the critical viscoelastic velocity were selected to be threshold values, that is, viscoelastic effect would happen when polymer solution flows through porous media, if the critical Deborah number or the critical viscoelastic velocity is exceeded. All these done helped establish the numerical simulation method of viscoelastic effect and made it possible to improve the software of polymer flooding successfully. Using the improved software and by the means of numerical simulation, changes which viscoelastic effect could make of polymer flooding were studied, and finally made conclusions that profile control and mid-low permeability oil layer potential development play important roles in recovery increment, meanwhile the improvement of flooding efficiency also can not be overlooked.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2002年第3期91-93,98,共4页
Petroleum Exploration and Development
关键词
黏弹效应
数值模拟
研究
聚合物驱油
本构方程
viscoelasticity
polymer flooding
constitutive equation
numerical simulation
