摘要
现有的聚合物驱分流量方程多针对陆上油田建立,且对聚合物流动过程中涉及的物化现象考虑不足,对渤海稠油油藏的适应性较差。为更好的描述海上油田注聚油藏动态,结合现有的分流量方程,考虑了聚合物黏弹性、聚合物老化降解以及原油张弛特性等关键因素的影响,建立了改进的聚合物驱分流量方程,为海上聚合物驱快速评价提供一种有效的预测方法。计算分析表明:聚合物黏弹性、降解效应、原油黏度特性以及不可及孔隙体积等均会对聚驱分流曲线形态产生明显影响;改进后的分流量方程能较准确预测海上聚合物驱动态。
The existing oil-water fractional flow theory in polymer flooding was mostly for onshore oilfields,and none of the flow equations can account for sufficient physico-chemical phenomena.The applicability of these equations was very poor for Bohai heavy oil reservoir.In order to get a better description of polymer flooding dynamics of offshore oilfield,a modified fractional flow equation was set up based on existing flow theory,with polymer viscoelasticity,polymer degradation and relaxation characteristics of crude oil taken into account.It can be served as an effective prediction method for fast evaluation of polymer flood offshore oilfields.The calculation results show that： viscoelasticity of polymer,degradation effect,viscosity properties of crude oil and inaccessible pore volume all have obvious influence on oil-water fractional flow curve;the equation established in this paper can accurately predict polymer flooding performance of offshore fields.
出处
《科学技术与工程》
北大核心
2013年第18期5158-5163,共6页
Science Technology and Engineering
基金
国家科技重大专项(2011ZX05024-004-07)资助
关键词
聚合物驱
分流量
稠油油藏
海上油田
黏弹性
polymer flooding fractional flow equation heavy oil reservoir offshore oilfield vis-coelasticity
