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针对濮城油田东区 Es下2 油藏储层非均质性严重、高含水开发期水驱动用程度低的特点 ,对其储层沉积特征、流动单元沉积微相及与剩余油分布的关系进行了研究。该区 Es下2 亚段属于浅水湖泊三角洲 ,骨架砂体为水道砂、水道间砂、前缘砂、远砂坝。动态资料及油藏精细数值模拟研究表明 ,流动单元的沉积微相与油层的水淹程度和地下剩余油的分布密切相关 :河道砂微相油层水淹严重 ,剩余油潜力较小 ;前缘砂和河道间微相油层水淹程度中等 ,剩余油潜力大 ;远砂坝微相油层水淹程度低 ,剩余油潜力中等。根据剩余油分布特点 ,确定了 5种改善水驱效果的方法 ,实施后取得了很好的效果
In view of the characteristics of reservoir heterogeneity and low degree of water-driven use in high water cut during the development of Es 2 reservoirs in the eastern area of Pucheng Oilfield, the relationship between reservoir sedimentary features, sedimentary microfacies of flow units and distribution of remaining oil Study. Sub-paragraph Es 2 belongs to the shallow lakes delta, skeleton sand body is water channel sand, channel sand, front sand, far sand dam. The dynamic data and reservoir numerical simulation show that the sedimentary microfacies of flow units are closely related to the degree of flooding and the distribution of remaining oil in the reservoir. The waterflooding of the channel sand micro-facies is serious and the residual oil potential is small. And the inter-channel micro-facies reservoir has a moderate degree of flooding. The remaining oil potential is high. The submarine sand dam microfacies have a low degree of flooding and a moderate residual oil potential. According to the distribution characteristics of remaining oil, five methods to improve the effect of waterflooding were determined, and good results were achieved after implementation