三角洲前缘截削式水下分流河道砂体油藏单井控制水锥研究

Single Well Water-cone Controlling in Cut Type Sand Reservoirs of Underwater Channel Delta Front

辫状河三角洲前缘截削式水下分流河道砂体内部层次复杂。针对东营凹陷新立村油田沙二段辫状河三角洲前缘水下分流河道砂体油藏,在岩心观察的基础上,结合粒度分析资料和室内渗透率测试资料,对整个断块所有井进行测井二次解释处理,对水下分流河道砂体平面分布形态和渗透率分布特征做了研究;并以A8-7井为例建立单井地质模型,进行室内数值模拟计算研究,在实践中取得了较好的增油效果,以期提高底水油藏的单井采收率水平。

The internal hierarchy of cut type underwater distributary channel sand of braided fluvial river delta front was very complex.Based on the sand braided fluvial underwater channel in Xinlicun Oilfield in Dongying Sag,by observing the cores and analyzing the viscosity data and permeability data all the detected wells in the block were re-interpreted,its plain distributive shape and permeability distribution characters were studied.A single well geological model was established by using Well XLA8-7 for example,and a laboratory numerical simulation was carried out.The result shows that good effect is obtained for oil increment,it can be used to enhance oil recovery.