摘要
以吴起Z区块延9油藏为研究对象,在油藏地质研究的基础上开展注水开发效果评价。延9油藏属于典型的岩性-构造油藏,构造上总体表现为平缓的西倾单斜构造,局部鼻状隆起对产量具有决定性作用。开发初期依靠天然能量开发,2014年投入注水开发,目前水驱控制程度达到60%以上,随着注水地层能量得到有效补充,地层压力保持大于100%;但由于各小层砂体发育不稳定,平面上注水见效大,同时受油藏边底水的影响,含水上升率较高,下步重点从制定合理的生产制度和注水参数,实现延安组油藏稳油控水,从而进一步提高区块原油采收率。
This article takes the Yan 9 reservoir in the Zhangtaizi oil area of Wuqi as the research object,and conducts an evaluation of the effectiveness of water injection development based on reservoir geological research.Yan 9 oil reservoir is a typical lithological-structural reservoir,which is generally characterized by a gentle west-dipping monocline structure,with local nose-shaped uplifts playing a decisive role in production.In the early stage of development,it relied on natural energy development.In 2014,it invested in water injection development.Currently,the degree of water drive control has reached more than 60%.As the energy of the water injection formation is effectively supplemented,the formation pressure remains greater than 100%;However,due to the unstable development of sand bodies in each sublayer,water injection has a significant effect on the plane,and at the same time,it is affected by the edge and bottom water of the reservoir,resulting in a high rate of water cut increase.The next step is to focus on developing a reasonable production system and water injection parameters to achieve stable oil production and water control in the Yan’an Formation reservoir,thereby further improving the recovery rate of crude oil in the block.
作者
朱锦艳
王伟龙
Zhu Jinyan;Wang Weilong(Wuqi oil production plant of Yanchang Oilfield Co.,Ltd,Yan’an 717600;Production and Construction Project Headquarters of Yanchang Oilfield Co.,Ltd,Yan’an 716000)
出处
《石化技术》
2025年第5期230-231,169,共3页
Petrochemical Industry Technology
关键词
延安组
构造特征
注水效果
采收率
Yanan Formation
Structural characteristics
Water injection effect
Recovery ratio
