大庆油田高含水期深部液流转向试验研究

摘要

At present,Daqing Oilfield has entered the extra high water-cut stage.With the increasing recovery percent of reserve,the effect of waterflooding becomes worse and worse because of high scattered remaining oil distribution,more watered-out wells,and serious interlay interference.Now,the conventional chemical conformance control technologies can not be used to plug deep parts in high permeability layer or large channel.Taking SⅡ1+2b formation in the western of Bei 3 block as an example,we studied the deep fluid diversion technology.A new technology for improving effect of wateflood-ing was proposed,which includes plugging water breakthrough channel and increasing the utilization of medium to low per-meability formations.The technology can provide a new way for further improving the development effect of water flooding oilfield at high water-cut stage.%大庆油田目前已进入特高含水期。随着区块采出程度的日益提高，剩余油高度分散，水淹普遍，层间矛盾较为突出，水驱效果变差。目前，常规的化学调剖方法还很不完善，不能够对高渗层或大孔道深部进行封堵。以北三区西部SⅡ1＋2b层为例，对深部液流转向技术进行研究，并且提出封堵水窜通道，增加中低渗透层利用率，改善水驱效果的新技术，为高含水油田进一步改善水驱开发效果提供新的途径。