油田聚合物驱潜力评估方法

Oil field polymer flooding potential evaluation method

通过喇、萨、杏油田聚合物驱开发实践经验总结,认为油层的连通状况、油层中有效厚度大于1 m单砂层储量的大小、层系组合等都是决定聚合物驱开发效果最重要的因素。基于上述认识,利用精细地质研究成果,研究建立了反映油层连通状况的有效储量控制系数统计模型。同时考虑油层中有效厚度大于1 m单砂层储量的比例,建立了聚合物驱采收率提高值评估模型。在上述研究的基础上,结合聚合物驱开发层系组合原则、经济评价结果,研究建立了一套系统的聚合物驱潜力评估方法。采用该方法可对油田聚合物驱的储量潜力和增油潜力做出比较准确的评估,并将聚合物驱潜力分层定量化,使聚合物驱规划方案编制具有可操作性,为油田的开发决策提供重要的基础。

Based on polymer flooding experience in Lamadian, Sa ertu and Xingshugang oilfields, the paper holds that the communication status of reservoir, the reserve of single sand layer whose net thickness is more than one meter, and layer system are all the most important factors to determine the polymer flooding development effect. Based on the above knowledge, the paper studied and established an available reserve control ratio statistical model to reflectreservoirs communication status by using fine geological research results. At the same time, considering the reserve ratio of single sand layers with net thickness over one meter, the paper has also established a polymer flooding EOR value evaluation model. Based on the study mentioned above, combining polymer flooding development layer system combination principle and economic evaluation result, the paper has studied and established a set of systemic polymer flooding potential evaluation method. With this method, the reserve potential and EOR potential of polymer flooding in oil field can be evaluated quite accurately, and polymer flooding potential layer allocation can be quantified to let polymer flooding programming have operability and provide important basis for oil field development strategy making.