大庆油田三类油层聚合物驱开发实践

在分析大庆油田三类油层地质特征的基础上，通过室内物理模拟实验和数值模拟研究，以及对大庆油田正在开展的三类油层注聚合物试验区开发状况分析，总结出大庆油田三类油层聚合物驱开发的主要做法：细分开采层系，严格控制注聚合物对象，减少层间差异，提高油层动用程度；三类油层聚合物驱需缩小注采井距至100m左右，以提高聚合物驱控制程度，完善井网注采关系。优选三类油层聚合物相对分子质量时，需要考虑聚合物相对分子质量对驱油效果的影响，并考虑聚合物相对分子质量与油层配伍性以及低渗透油层黏土矿物膨胀对渗透率的影响。图3表5参8

Practice of tertiary-main layers polymer flooding in Daqing Oilfield

Based on physical simulation experiments and mathematical simulation,the paper summarizes a series of methods about tertiary-main layers polymer flooding in Daqing Oilfield,including: accurately dividing layer series of development;strictly controlling object of polymer-flooding;declining differences of formation;enhancing the degree of exploring oil-bearing formation;the injection-production well spacing should be 100m or so to enhance the controlling degree and improve injection-production connection.In selecting relative molecular weight of polymer,the oil displacement efficiency of polymer flooding,the compatibility of relative molecular weight and oil-bearing formation,and the impact of the clay swelling of low permeable formation on permeability should be considered.