聚-三元同驱系统压力分布及影响因素研究

Study on Pressure Distribution and Influencing Factors of Polymer-Trinity Flooding System

研究大庆萨中东区二类油层聚-三元同驱系统,运用数值模拟方法,计算并分析在各个时期平面井间和纵向地层压力分布规律;同时,综合考虑影响地层压力分布的因素,通过正交设计方差分析原理,将各因素对压力分布的影响程度进行排序。研究结果表明,在不同时期,平面和纵向上压力变化较大,存在相互干扰,但随着时间推移,该干扰逐渐削弱,得到压力存在趋于一致趋势的规律;影响地层压力分布的主控因素,对地层压力分布影响程度大小排序为注采速度>注采比>渗透率变异系数>注入时机三元中聚合物浓度>聚合物浓度。对矿场实际施工工作有一定指导意义。

For polymer-ternary drive system in Daqing Sa Middle East Class II reservoirs, numerical simulation was used to calculate and analyze formation pressure distribution in the plane between wells and in vertical formation in various periods; at the same time, factors to affect formation pressure distribution were analyzed; by orthogonal design analysis, the influence degree of various factors on pressure distribution was ordered. The results show that, in different periods, planes and longitudinal pressure variations are larger, there is interfere with each other, but as time goes on, the interference undermines; the pressure exists convergence trend; the degree order of influence on the formation pressure distribution is injection production rate injection-production ratio permeability variation coefficient injection timing ternary polymer concentration polymer concentration.