不稳定注水在广华油田广一区的应用

Application of unstable water injection in Guang-1 Area of Guanghua Oilfield

不稳定注水是油田开发中后期改善水驱效果的一种重要方法。针对广华油田广一区进入特高含水开发期的具体情况,我们采用不稳定注水的方式,并辅之以油井补孔、放大压差采油、老井恢复生产等措施,用以改善水驱效果,在控制油井含水上升,挖掘剩余油潜力方面,取得了较好效果。目前采出程度51.48%,已达到二次采油阶段较高原油采收率。

Unstable water injection is an important method to improve waterflood effect during the middle and later stage of oilfield development. Aiming at the special conditions of Guang-1 Area of Guanghua Oilfield being at extra-high water cut stage,we have used unstable water injection method,together with some measures such as oil well re-perforation、enhancing recovery through increasing pressure drawdown and making old oil well into reproduction to improve waterflood effect,which has gained good effects in controlling the increasing of water cut in oil producers and developing the production potential of residual oils. At present,the current oil recovery has been up to 51.48% of OOIP,and has reached higher oil recovery in secondary recovery stage.