辫状河沉积储层内部构型研究在港东一区的应用

Application of internal architecture of braided river sedimentary reservoir in No.No.1 area of Gangdong Oilfield

在油田开发中后期,辫流带内部构型单元对剩余油分布有着重要的影响,仅表征复合辫流带的分布已经不能满足油田开发的需要。本文以港东一区馆陶组为例,采用逐级解剖、分级描述的方法,对辫状河储层砂体及其内部构型进行了精细解剖,建立了五级构型界面——三级构型界面的岩电特征,重点针对心滩坝内部结构进行了详细剖析,并进一步分析心滩坝内部剩余油分布规律。在此基础上,有针对性地进行层内剩余油挖潜,方案实施后效果较好。

The internal configuration unit of the braided stream has an important influence on the distribution of remainingoil in the middle and late stage of oilfield development, only clear characterization of the distribution ofthe complex braided stream could not meet the needs of oil field development. Taking the Ng of No.1 area of GangdongOilfield as example, the sand bodies of the braided river reservoir and its internal configuration are finely analyzedby the cascade dissection and step description, the rock electrical characteristics from the five-grade configurationinterface to the three-grade configuration interface are established, the distribution of the remaining oil inbatture bar which are focused on are further analyzed. We have got good result on the development of the remainingoil on the basis of these measures.